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Basics & Theory

Energy Vanguard: These Ain't Yer Grandpappy's Heat Pumps
Energy Vanguard says an NESEA Building Energy conference gave reasons why a lot of people in the cold climate of New England love heat pumps.

IEA HPC: Overview Of Heat Pump Technology
IEA Heat Pump Center gives general information about heat pumping technology. It explains why this technology is beneficial, how it works and what typical applications are. It also tells you about different types of heat pumps and different working fluids.

IRC: Report On Heat Pumps For Residential Heating
Canadian Institute for Research in Construction report has a good description of air source heat pumps, their performance, and comparison of costs with electric furnace. 1978

REW: Overview Of Geothermal Heat Pumps
Renewable Energy World article outlines how different types of heat pumps function and some of their main applications.
Information Sources

NRCan: Types Of Heating Equipment & Controls
Natural Resource Canada describes various types of residential heating systems and controls.

US DOE: Types Of Heat Pump Systems
US Department of Energy provides information on types of heat pump systems.
Issues & Performance

Energy Vanguard: Why Does My Heat Pump Frost Over?
Energy Vanguard describes why the outdoor unit of a heat pump will occasionally grow frost around the outside of the unit when it's in heating mode.

GBA: Low Carbon Footprint Of Minisplits
Green Building Advisor describes why heating with a minisplit heat pump is greener than heating with fossil fuels.

NIST: Analysis Of Installation Faults On Heat Pump Performance
US National Institute of Standards and Technology study Sensitivity Analysis of Installation Faults on Heat Pump Performance found that substantial equipment efficiency is lost due to design and installation deficiencies. It presents faulty practices commonly-performed by contractors and details the resultant additional energy consumption. (PDF)
Procedures

Energy Vanguard: Benefit Of Heat Pumps & Hydronics
Energy Vanguard says heat pumps and hydronics are a great team for high performance homes.

Energy Vanguard: Shocking Truth About Heat Pumps
Energy Vanguard says the shocking truth about heat pumps is that they might well be a great fit for your home, or they might not. It depends. Are your priorities low energy bills, environmentally friendly energy sources, uniform heating with lower temperatures or short blasts of higher temperatures?

HGTV Remodels: 10 Key Features Of Heat Pump Systems
HGTV Remodels describes 10 key features of heat pump heating and cooling systems.

NRCan: Free Heat Pump Pre-Screening Tool
NRCan free Heat Pump Pre-Screening Tool is software that provides rapid assessments of heat pump systems for a specific set of building parameters, with minimal input requirements. This means that feasibility studies can be better justified and focused on only the most promising technologies for a given multi-family or commercial project.

NRCan: Heating & Cooling With Heat Pump
Natural Resourses Canada Office of Energy Efficiency supplies information on both air-source and ground-source heat pumps and related equipment (including thermostats).

Plumbing & Mechanical: Outdoor Reset Control & Heat Pumps
Plumbing & Mechanical describes how to maximize both the heating capacity and COP of heat pumps using outdoor reset control.
Product Supply

NRCan: Search For Heat Pump Products & Ratings
Natural Resources Canada provides online search for heat pump brands and their energy efficiency ratings.
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