Yes, it can. Most modern split air conditioning systems work in reverse as well, so the same unit that cools a room in July can heat it in January. So if you’re wondering whether air conditioning can heat your home through a South Wales winter, the short answer is yes, especially for single rooms, extensions and garden offices. Our air conditioning installation service covers systems that do both.
Most people still think of air con as a summer thing. That’s changing, and for good reason.
How does air conditioning heat a room?
A split air conditioning system is basically an air to air heat pump. In summer it pulls heat out of your room and dumps it outside. In winter it flips the process round.
The outdoor unit draws warmth from the outside air, even when it feels cold out there, and the refrigerant carries that heat indoors. The wall-mounted unit then blows warm air into the room.
Because it’s moving heat rather than making it from scratch, a good system can put out several units of heat for every unit of electricity it uses. That’s why air conditioning for heating can be surprisingly efficient compared with plug-in electric heaters.
Does air conditioning work in a cold South Wales winter?
For most of the year, yes. Our winters tend to be damp and grey rather than bitterly cold, which suits air source systems well.
Efficiency does drop as the temperature outside falls. On a hard frost the unit works harder, and you may notice it pause now and then to defrost the outdoor coil. That’s normal. It’s not a fault.
Modern units are designed to keep heating well below freezing, although exact performance depends on the model. It’s worth checking the manufacturer’s operating range before you buy, or asking your installer.
Where air conditioning makes most sense as heating
Air con isn’t usually a straight swap for your central heating. It doesn’t heat water for your taps or radiators, for a start. Where it really earns its keep is in rooms that your existing system struggles with, such as:
- Conservatories and garden rooms that are freezing in winter and roasting in summer
- Loft conversions and extensions where the radiators were never quite enough
- Home offices, so you’re not heating the whole house just to work in one room
- Bedrooms that face the prevailing wind, which plenty of hillside homes in the Valleys will know about
In older terraces across Newport, Pontypool and Cwmbran, it’s common to find one back room or extension that’s always colder than the rest. A single wall unit can sort that without touching the boiler. Take a look at our air conditioning in Newport page to see how we cover the city and surrounding areas.
Which air conditioning units can heat?
Most wall-mounted split systems sold for homes today offer both heating and cooling. The Worcester Bosch air conditioning range is a good example. The Bosch Climate 3000i, which we install, provides heating and cooling from the same unit, so you get year-round comfort from one system. Midea’s wall-mounted split systems also come with a heating mode.
Portable air conditioners are a different story. Many only cool, and the ones that do heat tend to be less efficient. If heating matters to you, a fixed split system is the better bet. Our guide to the best air conditioning systems goes into more detail on the options.
Is running air con for heating expensive?
It depends on the unit, how well insulated the room is, how you use it and your electricity tariff. Because heat pumps move heat rather than generate it, running costs are often lower than direct electric heating for the same room.
We won’t throw made-up figures at you. The best way to get a realistic idea is to look at the unit’s seasonal efficiency rating for heating (known as SCOP) and talk it through with an installer. You can also read our guide on how much air conditioning costs to understand what affects installation prices.
What to check before you install air conditioning for heating
A few things to sort out first:
- Room size and insulation. An undersized unit will run flat out and still struggle.
- Where the outdoor unit goes. It needs airflow and a sensible pipe route to the indoor unit.
- Planning rules. Many installs fall under permitted development, but listed buildings and conservation areas, such as parts of Monmouth town centre, may need permission. Check with your council if you’re unsure.
- A qualified installer. Fitting a split system involves handling refrigerant, which legally needs an F-Gas certified engineer. This isn’t a DIY job.
If you’re further out, we also fit air conditioning in Monmouth and across Monmouthshire.
Frequently asked questions
Can air conditioning replace my central heating?
In most homes, not entirely. Air to air systems heat the air in the rooms where units are fitted, but they don’t provide hot water or feed radiators. Many South Wales homeowners use air con alongside their boiler, heating problem rooms or covering the shoulder months in spring and autumn without firing up the whole central heating system.
Is there a grant for air conditioning that heats?
Air to air heat pumps, which is what heating air conditioning is, aren’t currently covered by the Boiler Upgrade Scheme. That scheme is aimed at air to water and ground source heat pumps that replace a boiler. Grant rules change, so it’s worth checking the latest government guidance before you plan an install.
Why does my air conditioning blow cold air for a minute on heat mode?
Most units hold back the indoor fan until the coil has warmed up, so you shouldn’t get a blast of cold air. If you do notice a short pause or a cooler spell, the unit may be running a defrost cycle. This is normal in frosty weather. If it happens constantly, get it checked by a qualified engineer.
Is autumn a good time to install air conditioning?
It can be. Demand for air conditioning tends to peak during summer heatwaves, so planning ahead in the cooler months gives you time to choose the right unit and have it ready for heating through winter and cooling next summer.
Thinking about air conditioning for year-round comfort?
If there’s a room in your home that never quite warms up, a heating and cooling air conditioning unit could be the answer. Give us a call on 01633 865903 or drop us a message and we’ll talk you through the options for your home.
