Title 24 Compliance & HERS Rating Services Across California

Who is a Structural Engineer? A structural engineer is a professional who specializes in designing, analyzing, and testing structures such as buildings, bridges, tunnels, and other infrastructure. Structural engineers use scientific principles and advanced engineering knowledge to ensure that structures are safe, stable, and durable. ​ Structural engineers work in many different industries and sectors, including construction, transportation, energy, and manufacturing. They may work on new construction projects, renovations or additions to existing structures, or the maintenance and repair of aging infrastructure. ​ Some common tasks that a structural engineer might perform include: ​ Analyzing the strength and stability of a structure Designing new structures or modifications to existing structures Testing building materials and components for strength and durability Creating blueprints and technical drawings for construction projects Developing and implementing safety procedures and protocols Collaborating with architects, contractors, and other professionals to ensure that the structure is designed and built to meet project specifications. ​ Structural engineers play a critical role in ensuring that buildings and other infrastructure are safe and reliable for use. They are also responsible for ensuring that structures are designed in compliance with building codes and regulations, and that they can withstand the forces of nature and other potential hazards. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

Here are some common scenarios when you may want to consider hiring a structural engineer: ​ During the design phase of a new construction project: If you are planning to build a new home, commercial building, or other structure, you may want to hire a structural engineer to ensure that the design is sound and meets building codes and regulations. The structural engineer can work with your architect or builder to create a design that is safe, stable, and durable. ​ Before purchasing or renovating a property: If you are considering purchasing or renovating a property, you may want to hire a structural engineer to perform an inspection and evaluation of the structure. The structural engineer can identify any potential issues or problems, such as foundation or framing issues, and provide recommendations for repairs or modifications. ​ When planning a major renovation or addition: If you are planning a major renovation or addition to an existing structure, you may want to hire a structural engineer to evaluate the existing structure and ensure that any modifications or additions are feasible and safe. ​ When dealing with damage or structural issues: If your property has experienced damage, such as from a natural disaster, fire, or water damage, you may want to hire a structural engineer to evaluate the damage and recommend repairs or modifications. Similarly, if you have noticed structural issues, such as cracks or sagging floors, you may want to hire a structural engineer to identify the cause and provide recommendations for repairs. ​ In general, a structural engineer can be hired at any stage of a construction or renovation project where the structural integrity of a building or infrastructure is a concern. By working with a structural engineer, you can ensure that your project is safe, stable, and designed in compliance with building codes and regulations. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

The cost of a structural engineer can vary depending on several factors, including the complexity of the project, the location, the engineer's experience and qualifications, and the scope of the services required. In general, the cost of hiring a structural engineer for a residential project can range from a few hundred dollars to several thousand dollars, depending on the scope of work. For a commercial project, the cost can be significantly higher. Some structural engineers may charge an hourly rate, which can range from around $100 to $250 per hour, while others may charge a flat fee for a specific service, such as a foundation inspection or a design review. Some engineers may also charge a percentage of the project cost, which can range from 1% to 5% or more, depending on the project's complexity. It's important to keep in mind that the cost of a structural engineer is just one part of the overall cost of a construction or renovation project. Hiring a qualified engineer can help ensure that the project is designed and built to meet all necessary safety and structural requirements, which can help prevent costly mistakes and delays in the long run. If you are considering hiring a structural engineer, it's a good idea to get multiple quotes from different engineers and to ask for references and examples of their past work. This can help you find an engineer who is experienced, qualified, and offers fair pricing for their services. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

An architectural drafter is a professional who specializes in creating technical drawings and plans for buildings and other structures. Architectural drafters work with architects and other design professionals to transform design concepts into detailed drawings that can be used for construction or renovation projects. ​ Architectural drafters use computer-aided design (CAD) software and other tools to create detailed 2D and 3D drawings of buildings and other structures. These drawings include floor plans, elevations, sections, details, and other technical drawings that are used by construction professionals to build or renovate a building. ​ Architectural drafters work closely with architects, engineers, contractors, and other construction professionals to ensure that the design is practical and meets all building codes and regulations. They may also work with clients to help them visualize the design and make modifications based on their needs or preferences. ​ Architectural drafters may specialize in a particular type of building or structure, such as residential, commercial, or industrial buildings, or they may focus on specific aspects of building design, such as interior design, lighting design, or sustainability. They may work for architectural firms, engineering firms, construction companies, or government agencies. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

An architectural drafter can be hired at various stages of a construction or renovation project. Some common scenarios where you may want to consider hiring an architectural drafter include: ​ When planning a new building: If you are planning to build a new home, commercial building, or other structure, you may want to hire an architectural drafter to create detailed plans and drawings of the proposed design. The architectural drafter can work with you to create a design that meets your needs and preferences, and that is feasible in terms of building codes, regulations, and practicality. ​ When renovating an existing building: If you are planning to renovate an existing building, an architectural drafter can create detailed plans and drawings of the proposed changes. This can help ensure that the renovation is feasible and complies with building codes and regulations, and can help prevent costly mistakes or delays. ​ When creating interior design plans: If you are planning to renovate or redecorate the interior of a building, an architectural drafter can create detailed plans and drawings of the proposed changes. This can help you visualize the changes and make sure that the design is feasible and practical. ​ When designing outdoor living spaces: If you are planning to create an outdoor living space, such as a deck, patio, or pool area, an architectural drafter can create detailed plans and drawings of the proposed design. This can help ensure that the design is feasible and that it meets your needs and preferences. ​ In general, an architectural drafter can be hired at any stage of a construction or renovation project where technical drawings or plans are required. They can work with you to create a design that meets your needs and preferences, while ensuring that it complies with building codes and regulations and is feasible in terms of practicality and construction. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

The cost of hiring an architectural drafter can vary depending on several factors, including the experience of the drafter, the scope of the project, the location, and the specific services needed. In general, the cost can range from $50 to $150 per hour, although some drafters may charge a fixed fee for a specific project. ​ For small projects, such as creating plans for a simple home renovation or an outdoor living space, the cost may be at the lower end of this range, while larger projects, such as designing a new home or commercial building, may be at the higher end. The complexity of the design and the amount of detail required in the plans can also affect the cost. ​ In addition to the hourly rate or project fee, some architectural drafters may charge additional fees for services such as site visits, revisions, or additional meetings. It's important to discuss all fees and charges with the architectural drafter before hiring them to ensure that you understand the total cost of the project. ​ While the cost of hiring an architectural drafter may seem like an added expense, it can be a worthwhile investment in ensuring that the project is designed properly and meets all building codes and regulations. By working with an architectural drafter, you can ensure that the design is feasible and practical, and that any potential issues or problems are identified and addressed before construction begins. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

MPDLA proudly provides Title 24 compliance reports in compliance with California Building Energy Efficiency Standards. Through energy simulation, we ensure that our clients’ projects meet the standards set for new construction and large post-construction alterations of existing buildings under title 24. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

MPDLA is proud to offer Home Energy Rating System (HERS) Inspections throughout Southern California. Our team of certified professionals are knowledgeable in the latest industry standards, regulations and procedures to ensure quality assurance for each inspection. We take pride in delivering thorough, efficient inspections that meet all applicable regulations mandated by the state of California. Contact us today for more information! Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

MPDLA is proud to provide architectural drafting and interior design services in Southern California. With a focus on quality, care, and attention to detail, our experienced professionals can create prints tailored to meet your specific needs. Whether it's a commercial or residential space, we have the capability and expertise to work with you from conception through completion. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

MPDLA is pleased to offer structural engineering services in Southern California. We are dedicated to providing top quality services and strive for excellence with every project. Our team of experienced engineers is available to work on a variety of projects, such as design, rehabilitation, load testing, and more. With our proven track record of success, you can be sure that your project will be done right the first time. Contact us today and discover why we are the best choice for your structural engineering needs. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

MPDLA specializes in providing Permit Expediting services throughout Southern California. With years of experience in the industry, our team is well-equipped to handle a wide range of organizational and procedural challenges associated with the permit obtaining process. We are dedicated to ensuring timely approval and completion of each project, so that you can get your business up and running as soon as possible. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

A. Mandatory Requirements: ​ Mandatory roof deck insulation in newly constructed attic systems in Climate Zones 4 and 8–16 to meet an area-weighted average U-factor no greater than 0.184 (§150.0[a]1). Ducts in conditioned space can be uninsulated if specific conditions are met as explained in Section 4.4.1 (§150.0[m]1B). Electric readiness is now required for space heating, cooking, and clothes dryers when gas equipment is installed. Electrical infrastructure must be provided to the equipment location for the future installation of electrical appliances. (§150.0[t]-[v]). The electric-ready requirements for gas water heaters have been revised (§150.0[n]). Updated mechanical ventilation requirements based on the 2019 version of ASHRAE 62.2 (§150.0[o]). New requirements for central fan integrated ventilation systems requiring a motorized controlled damper (§150.0[o]1B). ​Updated local exhaust requirements for kitchen range hoods. Gas ranges require higher ventilation rates or capture efficiencies than electric ranges. (§150.0[o]1G). ​ Simplify the hot water piping language and align with the Plumbing Code (§150.0[j]). Updated HPWH-ready requirements for gas water heater installations that include providing a designated space for a future HPWH installation. (See Electric Readiness — Chapter 10.) New battery storage-ready infrastructure requirements. (§150.0[s]). B. Prescriptive Compliance: Under the prescriptive compliance approach, the heating equipment is required to be a heat pump in Climate Zones 3, 4, 13, and 14. In other climate zones, it can be either a heat pump or a gas heating system (§150.1[c]6). Under the prescriptive compliance approach, water heating equipment is required to be a heat pump water heater or a solar water heating system with electric backup and minimum 70 percent solar fraction. In Climate Zones 3, 4, 13, and 14 a gas instantaneous water heater is allowed (§150.1[c]8). ​ C. Performance Compliance: All compliance software programs approved by the CEC use the same compliance engine as the public domain software. The technical details and information about how the energy budget is determined are included in the 2022 Single-Family Residential Buildings Alternative Compliance Manual (ACM) Reference Manual. A new Energy Design Rating (EDR) metric, EDR1, was added that is based on hourly source energy. What was referred to as just “Efficiency EDR” in the 2019 code is now efficiency EDR2. D. Compliance requires meeting three components of an Energy Design Rating (EDR): (1) EDR (source), (2) Efficiency EDR2, and (3) Total EDR2 (§150.1(b)1). For more information, see Chapter 8. E. Additions and Alterations: An exception was added that not require junior accessory dwelling units (JADUs) that are classified as additions to an existing building to meet the whole-building mechanical ventilation requirements. JADUs are dwelling units that are no more than 500 square feet and contained entirely within an existing single-family building, New language clarifying when mechanical ventilation requirements apply to alterations. Ceiling insulation in additions 700 square feet or less must meet R-38 in Climate Zones 1, 2, 4, and 8–16 and R-30 in Climate Zones 3 and 5–7. Expand the cool roof requirements for steep-sloped roof replacements to Climate Zones 4 and 8–9. The allowable exceptions were also revised. Expand the cool roof requirements for low-sloped roof replacements to Climate Zones 4, 6–12, and 14. The allowable exceptions were also revised. Add a new requirement for roof deck insulation for low-sloped roof replacements in Climate Zones 1, 2, 4, and 8–16. R-14 continuous roof deck insulation or and equivalent assembly roof assembly U-factor of 0.039 is required. Various exceptions to this requirement are allowed. New language modifying when replacement electric resistance space heating equipment is allowed. Reduce the duct sealing target for altered duct-and space-conditioning systems from 15 percent to 10 percent of total duct leakage in all climate zones. ncrease the prescriptive duct insulation from R-6 to R-8 in Climate Zones 1–2, 4, 8–10, and 12-13. ​ Reduce the 40-foot trigger for prescriptive duct sealing and insulation to 25 feet for altered systems. Eliminate the minimum length requirement for additions and require duct sealing whenever an existing duct system is extended to serve an addition. Add a prescriptive requirement for insulation and sealing in vented attics for altered ceilings or when an entirely new or complete replacement duct system is installed in a vented attic. The requirements apply in all climate zones except 5 and 7. Various exceptions to this requirement are allowed. ​ New doors that result in an increase in exterior door area must meet the newly constructed building requirements of a maximum U-factor of 0.20. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

Title 24 is a set of energy efficiency standards for buildings in the state of California, and a Title 24 compliance report is a document that confirms that a building meets those standards. The report is required by law for new construction and for certain types of renovations or additions to existing buildings. The Title 24 compliance report includes information about the building's insulation, heating and cooling systems, lighting, and other features that affect energy usage. The report will detail how the building's design, materials, and systems meet the specific requirements of Title 24, which vary depending on the building's location, size, and use. The report may be prepared by a qualified energy consultant or engineer who is trained in Title 24 requirements and has the necessary software and tools to perform the necessary calculations. The compliance report must be submitted to the local building department in order to obtain permits and approvals for construction or renovation. In summary, a Title 24 compliance report is a document that confirms a building meets energy efficiency standards required by law in the state of California. It helps ensure that buildings are designed and built to be as energy-efficient as possible, which can lead to lower energy costs for owners and occupants and help reduce greenhouse gas emissions. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

The cost of a Title 24 Energy Report can vary depending on several factors, such as the size and complexity of the building, the location, and the scope of the project. However, in general, the cost of a Title 24 Energy Report can range from a few hundred dollars to several thousand dollars. ​ For residential projects, the cost of a Title 24 Energy Report typically ranges from $300 to $1,000, depending on the size of the home and the complexity of the design. For commercial projects, the cost can be higher, ranging from $1,000 to $5,000 or more, depending on the size and complexity of the building. ​ It's important to note that the cost of a Title 24 Energy Report is just one of several costs associated with building a new construction project or renovating an existing building. However, investing in an energy-efficient design can help you save money on energy costs in the long run, as well as qualify for rebates and incentives from utility companies and government agencies. ​ If you're planning a new construction project or a major renovation in California, it's important to budget for the cost of a Title 24 Energy Report and work with a certified energy consultant or HERS rater to ensure that your building meets the state's energy efficiency standards. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

Compliance Document RegistrationThe CEC developed the HERS program in part to help ensure compliance with the Energy Code for residential projects that require field verification and diagnostic tests (HERS Verification). Registration of compliance documentation (CF1Rs, CF2Rs, and CF3Rs) is required for any residential construction project for which a CF3R is required. (Not all residential construction projects require a CF3R.) Reference Residential Appendix RA2 and Reference Joint Appendix JA7 provide detailed descriptions of procedures and responsibilities for the registration of CF1R, CF2R, and CF3R.​Compliance document registration is required for all newly constructed homes, most additions, and many alterations. When registration is required, compliance documents must be electronically submitted to a CEC-approved HERS Provider. The HERS Provider services include a HERS data registry (HERS registry) for the registration and retention of compliance documents.​All compliance documents (CF1Rs, CF2Rs, and CF3Rs) submitted to the registry must be certified and signed by the applicable responsible person (§10-103) as well as any other required signatories. The registry will assign a unique registration number to each document when completed, and certification (by an electronic signature) is provided by all signatories. The registry will retain the unique registered documents, which are available via secure Internet access to authorized users. This allows authorized users download unalterable electronic certificates or to make paper copies of the registered documents for purposes such as submittal to the enforcement agency, posting in the field for inspections, or sharing with the building owner. (See Section 2.2.9 of this manual.)​Types of registry users include energy consultants, builders, building owners, construction contractors and installers, HERS Raters, enforcement agencies, and the CEC. Document authors are typically employed by the person responsible for the document, with specific exceptions. Authorized users are granted access rights to the electronic data associated with the projects under their direct control.​Complying with and enforcing the Energy Code in residential buildings involves many parties. Those involved may include the architect or designer, builder/developer, purchasing agent, general contractor, subcontractor/installer, energy consultant, plan examiner, inspector, Realtor®, and owner/first occupant. All these parties must communicate and cooperate for the compliance and enforcement process to run efficiently. The Energy Code specifies detailed reporting requirements intended to provide design, construction, and enforcement parties with the information to ensure that the energy features are properly installed. Each party is accountable to ensure that the features that it is responsible for are correctly installed. This section outlines each phase of the process, responsibilities, and requirements. The energy compliance documentation has been revised and reorganized. Prescriptive (Chapter 1.6) versions of the certificate of compliance (CF1R) have been designed to be used specifically with: 1. Single-family residential newly constructed buildings (CF1R-NCB-01). 2. Single-family residential additions (CF1R-ADD-01). 3. Single-family residential alterations (CF1R-ALT-01). 4. Single-family residential HVAC changeouts (CF1R-ALT-02). 5. Solar water heating worksheet (CF1R-STH-01). The certificate of installation (CF2R) is separated into: 1. Envelope (CF2R-ENV). 2. Lighting (CF2R-LTG). 3. Mechanical (CF2R-MCH). 4. Plumbing (CF2R-PLB). 5. Photovoltaic and battery storage, solar-ready zone area, and solar thermal water heating (CF2R- PVB, SRA, and STH, respectively). These categories and most compliance measures have a separate CF2R form that is specific to a particular installation. CF2R forms also incorporate references to applicable mandatory requirements. The HERS certificate of verification (CF3R) forms are categorized and organized in the same way as the CF2R forms. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

Home Energy Rating System (HERS) rating is a measurement of a home's energy efficiency. It is calculated by a certified HERS rater who performs a series of tests and inspections on the home to evaluate its energy performance. The HERS rating system provides a score between 0 and 150, with lower scores indicating better energy efficiency. A HERS rating of 0 means that the home produces as much energy as it consumes, while a HERS rating of 150 means that the home is not at all energy-efficient and consumes a lot of energy. ​ The HERS rating system is used to determine a home's energy efficiency and identify areas for improvement. Homeowners can use the rating to make energy-efficient upgrades and lower their energy bills, while builders can use it to design and construct more energy-efficient homes. Additionally, some states and municipalities require a HERS rating as part of their energy code or building regulations. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

HERS ratings are important because they provide an objective measurement of a home's energy efficiency. The rating allows homeowners, homebuyers, builders, and real estate professionals to compare the energy efficiency of different homes and make informed decisions based on their energy costs and environmental impact. ​ There are several benefits to having a HERS rating: Energy efficiency: The rating provides a detailed analysis of the home's energy performance, allowing homeowners and builders to identify areas for improvement and make energy-efficient upgrades. ​ Lower energy bills: By making energy-efficient upgrades based on the HERS rating, homeowners can save money on their energy bills over the lifetime of the home. ​ ​Environmental impact: Homes with higher HERS ratings use more energy and have a greater environmental impact than those with lower ratings. Improving a home's HERS rating can reduce the amount of energy consumed and lower its environmental impact. ​ Resale value: Homes with lower HERS ratings may have a higher resale value because they are more energy-efficient, and buyers are often willing to pay more for homes with lower energy costs. ​ ​ Overall, HERS ratings are an important tool for evaluating and improving the energy efficiency of homes, which can benefit homeowners, builders, and the environment. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

A HERS rater is a trained and certified professional who performs a series of tests and inspections on a home to evaluate its energy efficiency. Here are some of the key tasks that a HERS rater typically performs: ​ Conduct a site visit: The rater will visit the home and collect data on its size, orientation, construction type, and other features that may affect energy efficiency. ​ Perform a blower door test: This test measures the air tightness of the home, which can affect energy efficiency and indoor air quality. ​ Conduct a duct leakage test: This test measures the efficiency of the home's heating and cooling system by evaluating how much air is lost through leaks in the ductwork. ​ Inspect insulation: The rater will inspect the home's insulation and evaluate its type, location, and effectiveness. ​ Evaluate windows and doors: The rater will inspect the windows and doors for air leaks and evaluate their energy efficiency. ​ Analyze lighting and appliances: The rater will evaluate the home's lighting and appliances for energy efficiency. ​ Provide a HERS rating: Based on the data collected during the inspection, the rater will calculate a HERS rating for the home, which provides a score between 0 and 150. ​ Provide recommendations: The rater will provide recommendations for energy-efficient upgrades that can improve the home's HERS rating. ​ Overall, the goal of a HERS rater is to provide a comprehensive evaluation of a home's energy efficiency and identify opportunities for improvement. This information can help homeowners and builders make informed decisions about energy-efficient upgrades that can save money on energy bills and reduce the home's environmental impact. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

The cost of a HERS rating can vary depending on the size, location, and complexity of the home, as well as the specific services provided by the HERS rater. However, the cost of a HERS rating typically ranges from $300 to $800, with the national average around $500. ​ In addition to the initial HERS rating, some HERS raters offer additional services, such as energy modeling, which can provide a more detailed analysis of the home's energy performance and identify specific areas for improvement. These services may add to the overall cost of the rating. It's also important to note that some states and utilities offer incentives or rebates for homes that achieve a certain HERS rating or make energy-efficient upgrades based on the HERS rating. These incentives can help offset the cost of the rating and make it more affordable for homeowners. ​ ​ Overall, the cost of a HERS rating is a worthwhile investment for homeowners and builders who want to improve the energy efficiency of their homes and save money on energy bills over the long term. Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377

This section describes some procedures and requirements for HERS verification of energy efficiency features. HERS testing is performed by HERS Raters who are trained and certified to perform these services. The HERS Raters cannot be employees of the builder or contractor whose work they are verifying. Also, they cannot have a financial interest in the builder’s or contractor’s business, or advocate or recommend the use of any product or service that they are verifying. The training, quality assurance, and general oversight of the HERS Raters are conducted by HERS providers. ​ HERS verification is required only when certain regulated efficiency requirements or equipment features are installed. If such efficiency requirements or equipment features are not installed, then HERS verification is not required. For example, if a dwelling that must comply with the Energy Code does not have air distribution ducts, then HERS verification for duct leakage is not required for compliance. The following features require HERS verification: Duct sealing Duct location, surface area, and R-value Low-leakage ducts entirely in conditioned space Low-leakage air handlers Verification of return duct design Verification of air filter device design, filter MERV rating, and labeling Verification of prescriptive bypass duct requirements Refrigerant charge in ducted split-system and ducted packaged unit air conditioners and heat pumps, and mini-split system Refrigerant fault indicator display (FID) Verified system airflow Air handler fan efficacy Verified energy efficiency ratio (EER) Verified seasonal energy efficiency ratio (SEER) Heat pump-rated heating capacity Evaporatively cooled condensers Variable-capacity heat pump credit Whole-house fan Central fan ventilation cooling systems Continuous whole-building mechanical ventilation airflow Intermittent whole-building mechanical ventilation airflow Kitchen exhaust (including vented range hoods) Building envelope air leakage Quality insulation installation (QII) Quality insulation installation for spray polyurethane foam Verified pipe insulation credit (PIC-H) HRV/ERV system fan efficacy Verified central parallel piping (PP-H) Verified compact hot water distribution system expanded credit (CHWDS-H-EX) Demand recirculation: manual control (R-DRmc-H) Demand recirculation: sensor control (R-DRsc-H) ​Multiple recirculation loop design for DHW systems serving multiple dwelling units Verified drain water heat recovery system (DWHR-H) Still have questions? Email, text, or call us with your questions. We will get back to you within 1 business day. info@mpdla.com | (310) 683-4377