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Water Heating

By moving heat from one place to another instead of generating heat directly, gas or electric heat pump water heaters are up to three times more energy efficient than conventional water heaters. Explore a variety of commercial products and applications for this efficient water heating solution.

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The Best Solutions Come in Easy-to-Use Packages
  • Water Heating

The Best Solutions Come in Easy-to-Use Packages

Central heat pump water heater (CHPWH) systems serve the domestic hot water needs of a building in one central plant. Though they have become a key decarbonization technology by reducing greenhouse gas emissions and saving energy and costs, their complex design and installation requirements can pose barriers to widespread adoption. Packaged CHPWH systems reduce this complexity by simplifying design and installation.

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Project Spotlight: Central Heat Pump Water Heaters
  • Water Heating

Project Spotlight: Central Heat Pump Water Heaters

Central heat pump water heater (CHPWH) systems serve the domestic hot water needs of a building in one central plant. Though they have become a key decarbonization technology by reducing greenhouse gas emissions and saving energy and costs, their complex design and installation requirements can pose barriers to widespread adoption. Packaged systems reduce this complexity by simplifying design and installation.

 learn more
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Featured Resources

Case Study: Elizabeth James House CO2 Heat Pump Water Heater (HPWH) Multifamily Retrofit
Resources
  • Water Heating

Case Study: Elizabeth James House CO2 Heat Pump Water Heater (HPWH) Multifamily Retrofit

The Elizabeth James House CO2 HPWH Multifamily Retrofit case study demonstrated that multiple Sanden (CO2) heat pump water heaters (typically used in single-family residential applications), together with a novel “swing tank” design, can collectively serve the water heating and recirculation loop temperature maintenance needs of a 60-unit low-rise multifamily building in the Pacific Northwest.
Case Study: Hopeworks Station Place Distributed CO2 HPWH Performance Project
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  • Water Heating

Case Study: Hopeworks Station Place Distributed CO2 HPWH Performance Project

This case study monitored the performance of multiple Sanden (CO2) HPWHs distributed throughout the top floor of a 65-unit multifamily building. The Sanden unit was designed for use in single family homes but was adapted for multifamily use in this project by using a distributed heat trace design.
Case Study: Bayview Towers Hot Water Load Shift Demonstration and Simulation Analysis
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  • Water Heating

Case Study: Bayview Towers Hot Water Load Shift Demonstration and Simulation Analysis

The Bayview Tower project retrofitted an aging electric resistance water heating system in an occupied affordable housing high-rise located in Seattle. The new commercial heat pump water heating system at Bayview Towers marked the United States' first large-capacity CO2 refrigerant-based domestic water heating system. It is also the first installation of a load shift-capable commercial HPWH system nationwide.
Design Guide: CO2 Heat Pump Water Heaters for Multifamily Buildings
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  • Water Heating

Design Guide: CO2 Heat Pump Water Heaters for Multifamily Buildings

This CO2 Heat Pump Water Heaters for Multifamily Buildings Design Guide is intended as a reference for designing central commercial heat pump water heating (CHPWH) systems that use CO2 technology. The information in this guide can be used by developers, engineers, and architects to understand how central commercial heat pump water heaters can fit into a multifamily housing project, whether it is a full renovation, a technology upgrade, or a new build.
Design Guide: Central Heat Pump Water Heater (CHPWH)
Resources
  • Water Heating

Design Guide: Central Heat Pump Water Heater (CHPWH)

This design guide is intended to help consulting design engineers become familiar with how to design central heat pump water heater (CHPWH) systems in commercial buildings, in particular multifamily and other multi-tenant residential uses.
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Quick Jumps

  • HVAC

    Better comfort and energy costs start with the right HVAC. Understand how heating, cooling and airflow all directly contribute to the energy efficiency and tenant comfort of your commercial building.

  • Integrated Design

    From HVAC and lighting controls to secondary windows, there are many solutions for an efficient commercial building. Knowing how to integrate those solutions so they work together in an energy-efficient system may mean saving time and money. Whether it’s a retrofit or new commercial project, learn how to apply an integrated design.

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