Can air conditioning heat a business? Air-to-air heat pumps explained
How reverse-cycle air conditioning heats commercial premises, how efficient it is, how to size it for winter and when it can replace electric or gas heating.
Short answer
Yes. Reverse-cycle air conditioning is an air-to-air heat pump and can be the main heating for many offices, shops and studios, delivering several units of heat for each unit of electricity. It needs sizing for winter heating output, sensible controls and outdoor units positioned for defrost drainage.
How it works
A heat pump moves heat rather than making it. In heating mode the outdoor unit extracts heat from the outside air — even when it is cold — and the indoor units release it into the room. The ratio of heat delivered to electricity used is the coefficient of performance (COP); it is higher in mild weather and lower in very cold weather.
Sizing for winter
Heating output falls as the outdoor temperature drops, so units should be selected using their output at winter design conditions, not their headline cooling rating. Draught-proofing and controls can reduce the capacity needed.
Where it works best
- Offices and shops currently heated by electric panel heaters
- Studios and showrooms used in the daytime
- Premises with an existing air conditioning system that is only used for cooling
- Buildings where gas heating is being removed
Practical points
- Outdoor units defrost in cold, damp weather — plan drainage away from paths
- Set indoor units to direct warm air downward
- Use schedules and set-backs rather than constant high set points
- Keep filters clean: heating output drops when air flow is restricted
Questions
Is it cheaper than gas?
It depends on gas and electricity prices, the system's efficiency and the building. We give a running-cost estimate with the quote.
Will it work below freezing?
Yes, modern units heat well below freezing, with reduced output.
Related services
- Air-to-air heat pumps
- Split and multi-split systems
- Commercial air conditioning installation
- HVAC design and heat load surveys
This guide is general information, not legal advice. Rules can change; check the current position with the relevant authority for your building.