Heat Pump for Cold Climate
The cold-climate heat pump (CCHP) is the latest development in the design of high-efficiency air-source heat pumps. Thanks to the inverter or variable speed drive compressor design, these heat pumps can achieve high efficiency even in winter.
CCHP operates at close to 400% efficiency at 47°F or higher. When the temperature drops to zero, CCHP will maintain an efficiency of about 200%. This means that CCHP can provide 2 to 4 units of heating energy for every unit of energy consumed. CCHPs are very efficient, they can provide up to 90% of space heating needs, with an overall seasonal efficiency of 250%.
Just like other heat pumps, CCHP doubles as a cooling system in summer.
Classification of cold climate air source heat pumps:
1. Centrally ducted heat pump
The central pipe heat pump looks like a central air conditioner. It has an outdoor unit and a coil located in the domestic plumbing system.
In summer, the heat pump operates like a central air conditioner. The circulating fan passes air through the indoor coil. The refrigerant in the coil absorbs heat from the indoor air and then pumps the refrigerant to the outdoor coil (condenser unit). The outdoor unit discharges any heat in the home into the outdoor air and at the same time cools the home.
In winter, the heat pump reverses the direction of refrigerant flow, and the outdoor unit absorbs heat from the outdoor air and transfers it to the indoor coil in the piping system. The air passing through the coil absorbs heat and distributes it to the home.
2. Mini-split (ductless) heat pump
The working principle of the mini split heat pump is similar to the central pipe heat pump, but it does not use a pipe system. Most mini split or ductless systems have an outdoor unit and one or more indoor units (machine head). The indoor unit has a built-in fan that can move air to the coil to absorb or release heat from the coil.
A system with multiple indoor units is usually required to heat and cool the entire home. The mini split heat pump system is most suitable for homes without piping systems, such as homes with hot water boilers, steam boilers or electric skirting heaters. The mini split system is also very suitable for homes with open concept floor plans, as these homes require fewer indoor units.
The difference between CCHP and standard air source heat pump is:
1. The rated heating seasonal energy factor (HSPF) is higher.
2. Equipped with variable capacity compressors, making them incredibly efficient.
3. Install with a cross set point of approximately 0°F to ensure operation during the heating season.
4. Available rebates
Cold weather heat pump maintenance:
1. Check the air filter every 3 months to see if it needs to be replaced
2. Routine inspections to ensure that the supply air outlet and return air outlet are unobstructed
3. Regularly check and clean the outdoor coil to ensure that it is free of leaves, seeds, dust and lint
4. Annual system inspection conducted by qualified service professionals.
5. A licensed refrigeration technician can inform you of other operation and maintenance details of the system.
Please email us or call us directly to find out if CCHP is right for you.