Rooms and property types · 6 min read
Home Office Air Conditioning: Working From Home Comfortably
A home office is a small room with people, screens and glazing in it. That combination overheats faster than anywhere else in the house.
Published 2026-07-22 · Updated 2026-07-22 · WDI Group (Surrey) Ltd
Small room, large heat load
Two monitors, a laptop, a docking station and a person add up to several hundred watts of continuous heat in a room that might be nine square metres. Add a south-facing window and the room is unusable by lunchtime in July.
That is why home offices often need proportionally more cooling capacity than a bedroom of the same size.
It is a year-round problem
The same room is often freezing at 8am in January, because the central heating is programmed around a household that used to be out all day. A reversible unit fixes both ends of the year with one piece of equipment.
Heating one room to work in, instead of the whole house, is where the running cost argument becomes obvious.
Garden rooms and outbuildings
Garden offices are lightweight, heavily glazed and thermally quick — hot in summer, cold in winter. They are one of the best applications for a small split system, and the pipe run to a condenser on the outside of the building is usually short and simple.
The electrical supply to the building needs checking; we assess it at survey.
- Check supply capacity to the outbuilding first
- Short pipe runs keep cost down
- Small 2.0–2.5kW units are usually enough
- Quiet operation matters for video calls
Video calls and background noise
Microphones pick up fan noise that you stop noticing. A quality indoor unit on low fan is inaudible on a call; a portable air conditioner in the same room is not.
This alone is why many home workers switch from portables to a fixed system.
Frequently asked questions
- Can I claim it as a business expense?
- That is a question for your accountant. Note that VAT treatment depends on whether the space is residential accommodation — we set out the treatment on the quotation.
- Will it cope with a rack of IT equipment?
- Tell us the equipment load at survey. Server and comms rooms are a different design problem and we handle those on the commercial side.