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Evaluating Moisture Control of Variable-Capacity Heat Pumps in Mechanically Ventilated, Low-Load Homes in Climate Zone 2A

Reference

This report evaluates the performance of variable-capacity comfort systems, with a focus on inverter-driven, variable-capacity systems, as well as proposed system enhancements.

A properly sized cold climate heat pump can meet 100% of a home’s heating load in nearly any location in the United States

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Average wet-bulb temperatures across the United States

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Heat Recovery Ventilator (HRV)

Video

Video describing the Cold Climate Housing Research Center heat recovery ventilator system.

Strategy Guideline: Proper Water Heater Selection

Reference

Report about proper water heater selection developed to provide step-by-step procedures for evaluating preferred cost-effective options for energy efficient water heater alternatives based on local utility rates, climate, and anticipated loads.

Deep Energy Retrofits - Source Energy and Carbon Decisions

Reference

Part of a larger LBNL report (Deep Energy Retrofit Guidance for the Building America Solutions Center), the Source Energy and Carbon Decisions chapter helps users carefully assess the impacts of switching from gas to electricity for heating end-uses, using source energy and/or carbon emissions...

Hot Water Solutions

Reference

Website for consumers describing heat pump water heater technology and linking to retailers and installers.

Indirect evaporative cooler diagram

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Indirect/direct evaporative cooler blower diagram

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Room Air Conditioners

Reference

Web page providing an overview of room-level air conditioning systems such as window units and mini-splits.

HVAC in Multifamily Buildings

Reference

Paper providing a comprehensive overview of HVAC system design considerations and challenges specific to multifamily residential buildings, focusing on optimizing performance and addressing common issues.

Improving Air-Conditioner and Heat Pump Modeling

Reference

Presentation on Improving Air-Conditioner and Heat Pump Modeling.

Still Placing Ducts in the Attic? Consider Burying Them

Reference

Information sheet about buried ducts.

Building America Research Benchmark Definition - Updated December 2009

Reference

Document describing the Building America research benchmark for the residential building program.

By plotting the heating capacities at -4°F and 5°F and drawing a line between them, the capacity at 0°F can be estimated

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Air-Source Heat Pump Sizing and Selection Guide

Reference

Document providing step-by-step guidance to sizing air-source heat pumps for a cold climate.

These plots compare sizing approaches in terms of the approximate annual heating load a heat pump might carry throughout the year for a hypothetical home in Minneapolis, MN.

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This plot shows a heat pump’s minimum and maximum heating capacities overlaid with a home’s heating load line, allowing a designer to assess how well-suited the equipment is for the specific home.

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This plot shows a heat pump’s minimum and maximum heating capacities overlaid with a home’s heating load line, allowing a designer to assess how well-suited the equipment is for the specific home.

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This plot shows a heat pump’s minimum and maximum cooling capacities overlaid with a home’s cooling load line, allowing a designer to assess how well-suited the equipment is for the specific home.

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Wrong: This heat pump is oversized even for Approach 4, and its modulating zone has a small overlap with the home’s heating load line, resulting in a large amount of short-cycling.

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Wrong: Sized per Approach 3, there is small overlap between this heat pump’s modulating zone and the home’s heating load line, resulting in excessive short-cycling; it will require backup heat when the temperature is below 5°F

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Evaluating Moisture Control of Variable-Capacity Heat Pumps in Mechanically Ventilated, Low-Load Homes in Climate Zone 2A

A properly sized cold climate heat pump can meet 100% of a home’s heating load in nearly any location in the United States

Average wet-bulb temperatures across the United States

Heat Recovery Ventilator (HRV)

Strategy Guideline: Proper Water Heater Selection

Deep Energy Retrofits - Source Energy and Carbon Decisions

Hot Water Solutions

Indirect evaporative cooler diagram

Indirect/direct evaporative cooler blower diagram

Room Air Conditioners

HVAC in Multifamily Buildings

Improving Air-Conditioner and Heat Pump Modeling

Still Placing Ducts in the Attic? Consider Burying Them

Building America Research Benchmark Definition - Updated December 2009

By plotting the heating capacities at -4°F and 5°F and drawing a line between them, the capacity at 0°F can be estimated

Air-Source Heat Pump Sizing and Selection Guide

These plots compare sizing approaches in terms of the approximate annual heating load a heat pump might carry throughout the year for a hypothetical home in Minneapolis, MN.

This plot shows a heat pump’s minimum and maximum heating capacities overlaid with a home’s heating load line, allowing a designer to assess how well-suited the equipment is for the specific home.

This plot shows a heat pump’s minimum and maximum heating capacities overlaid with a home’s heating load line, allowing a designer to assess how well-suited the equipment is for the specific home.

This plot shows a heat pump’s minimum and maximum cooling capacities overlaid with a home’s cooling load line, allowing a designer to assess how well-suited the equipment is for the specific home.

Wrong: This heat pump is oversized even for Approach 4, and its modulating zone has a small overlap with the home’s heating load line, resulting in a large amount of short-cycling.

Measure Guideline: Ventilation Guidance for Residential High-Performance New Construction - Multifamily

Air Source Heat Pumps Tax Credit

Heat Pump Retrofit Strategies for Multifamily Buildings

Comparing Motor Technologies

Wrong: Sized per Approach 3, there is small overlap between this heat pump’s modulating zone and the home’s heating load line, resulting in excessive short-cycling; it will require backup heat when the temperature is below 5°F

Technology Solutions Case Study: Improving the Field Performance of Natural Gas Furnaces

Technology Solutions Case Study: Selecting Ventilation Systems for Existing Homes

Heat Pump Water Heating Modeling in EnergyPlus - Building America Residential Energy Efficiency Stakeholder Meeting

Energy Savings and Breakeven Costs for Residential Heat Pump Water Heaters in the United States