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2021 IECC Climate Zone 5C: Vented Attic, ICF Wall, ICF Basement Foundation

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Heat Pump Water Heater Guide - Best Practices and Technical Considerations for Single-Family New Construction

Reference

Informational guide describing the design, installation, and maintenance best practices and technical considerations for integrated Heat Pump Water Heaters in single-family and multifamily new construction.

Building Science Education: Heat Pump Water Heater Training Module

Reference

Training module describing the operation, efficiency, consumer and seller benefits, and cost comparison of Heat Pump Water Heaters (HPWH) against conventional gas, oil, or electric water heaters.

Climate Change, Extreme Heat, and Health Webinar

Presentation

Presentation describing the health impacts of the extreme heat due to climate change.

Imery & Co

Reference

Rain Control in Buildings, BSD-013

Reference

Document covering basic moisture control principles in the design of above-grade building enclosures; driving rain as a moisture load on walls; a classification system of the various rain control strategies available for walls; and good design practises for walls.

The cool exhaust air from this heat pump water heater is ducted out of the room, inducing warmer intake air to enter through a wall grille

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Anatomy of a Heat Pump Water Heater

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Accelerating Residential Building Decarbonization: Market Guidance to Scale Zero-Carbon-Aligned Buildings

Reference

Report providing product manufacturers, fabricators, contractors and installers, design professionals, owners, and real estate developers with technical performance and cost guidance for scalable zero-carbon-aligned new construction pathways and retrofit packages to achieve zero carbon retrofits and...

Ecotope

Reference

Central heat pump water heaters like this fully packaged system provide efficient, reliable domestic hot water for multifamily buildings; storage tanks are within the enclosure, and the heat pump is seen just outside.

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This mechanical room contains both the storage tanks (right) and heat pumps (left) of a central heat pump water heating system

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A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance.

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This fully packaged/skid-mounted central heat pump water heating system was shipped to the building on a truck and craned into location

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This packaged central heat pump water heating system has the heat pumps on the exterior of the blue enclosure, and the storage tanks, temperature maintenance equipment, mixing valve, and control modules on the inside

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Insight Homes

Reference

This fully specified central heat pump water heating system has four individual outdoor heat pump units plumbed in parallel to indoor storage tanks

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Types of heat pump water heaters commonly used in central heat pump water heating systems include single pass units, multi pass units, and integrated units

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A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi-pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance

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A central heat pump water heating system with a temperature maintenance swing tank configuration uses the water from the primary storage tank to provide most of the heat for hot water circulation temperature maintenance

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This central heat pump water heating system with a hot water circulation loop that returns to the primary storage tank relies on a multi pass heat pump to provide both primary DHW heating and hot water circulation temperature maintenance

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This central heat pump water heating system with a hot water circulation loop that returns to the primary storage tank relies on a single pass heat pump to provide both primary DHW heating and hot water circulation temperature maintenance

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Wrong: The exhaust air from one heat pump water heater is blowing into the intake of the heat pump water heater next to it

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Right: Maintenance valves are installed at the inlet and outlet of this central heat pump water heater

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Wrong: HPWH inlet and outlet are piped to mixing valve inlet and DCW make up, driving erratic HPWH and mixing valve behavior

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Kalamazoo Valley Habitat for Humanity

Reference

This retrofit central heat pump water heater system utilizes the existing water heater as a swing tank to provide temperature maintenance for the hot water circulation loop

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2021 IECC Climate Zone 5C: Vented Attic, ICF Wall, ICF Basement Foundation

Heat Pump Water Heater Guide - Best Practices and Technical Considerations for Single-Family New Construction

Building Science Education: Heat Pump Water Heater Training Module

Climate Change, Extreme Heat, and Health Webinar

Imery & Co

Rain Control in Buildings, BSD-013

The cool exhaust air from this heat pump water heater is ducted out of the room, inducing warmer intake air to enter through a wall grille

Anatomy of a Heat Pump Water Heater

Accelerating Residential Building Decarbonization: Market Guidance to Scale Zero-Carbon-Aligned Buildings

Ecotope

Central heat pump water heaters like this fully packaged system provide efficient, reliable domestic hot water for multifamily buildings; storage tanks are within the enclosure, and the heat pump is seen just outside.

This mechanical room contains both the storage tanks (right) and heat pumps (left) of a central heat pump water heating system

A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance.

This fully packaged/skid-mounted central heat pump water heating system was shipped to the building on a truck and craned into location

This packaged central heat pump water heating system has the heat pumps on the exterior of the blue enclosure, and the storage tanks, temperature maintenance equipment, mixing valve, and control modules on the inside

Insight Homes

This fully specified central heat pump water heating system has four individual outdoor heat pump units plumbed in parallel to indoor storage tanks

Types of heat pump water heaters commonly used in central heat pump water heating systems include single pass units, multi pass units, and integrated units

A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi-pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance

A central heat pump water heating system with a temperature maintenance swing tank configuration uses the water from the primary storage tank to provide most of the heat for hot water circulation temperature maintenance

This central heat pump water heating system with a hot water circulation loop that returns to the primary storage tank relies on a multi pass heat pump to provide both primary DHW heating and hot water circulation temperature maintenance

This central heat pump water heating system with a hot water circulation loop that returns to the primary storage tank relies on a single pass heat pump to provide both primary DHW heating and hot water circulation temperature maintenance

Wrong: The exhaust air from one heat pump water heater is blowing into the intake of the heat pump water heater next to it

Right: Maintenance valves are installed at the inlet and outlet of this central heat pump water heater

Wrong: HPWH inlet and outlet are piped to mixing valve inlet and DCW make up, driving erratic HPWH and mixing valve behavior

Kalamazoo Valley Habitat for Humanity

This retrofit central heat pump water heater system utilizes the existing water heater as a swing tank to provide temperature maintenance for the hot water circulation loop

Washington State Energy Code - WSEC

California REACH Codes

Advanced Water Heating Specification (AWHS) and Qualified Products List (QPL)