The bigger the size of heat pump, the better…right? Not really. When it comes to finding the right size heat pump for your house, there’s only a small margin for error: too big and the heat pump will short cycle; too small and the system will use the backup heater too often. Both cases will leave you with an inefficient and costly system.
The size of heat pump you need for your home will ultimately depend on 3 things:
Outdoor design temperature
Desired room temperature
Flow temperature
1.Outdoor design temperature
Air source heat pumps absorb heat from the air by passing icy-cold refrigerant liquid through heat exchanger coils. The warmer the air temperature outside, the better the heat pump will perform.
To ensure that the heat pump can meet your home’s demand for heat all year round, heat pumps are sized based on the coldest air temperatures of the year for your area. For example, heat pumps installed in Manchester use an outdoor air temperature of around -2.6oC.
The outdoor design temperature for your area will be taken from the MCS database – the higher the coldest temperature is, the smaller your heat pump needs to be. Unfortunately, there’s not a lot you can do to change this, since the minimum outdoor temperature will depend on where your home is located in the country.
The only downside to this is whenever the temperature is above this ‘worst case’ air temperature, the heat pump is technically oversized for your heating demand.
Remark：
Some of the articles are taken from the Internet. If there is any infringement, please contact us to delete it. If you’re interesting in heat pump products，please feel free to contact OSB heat pump.