For a typical Hampshire home, a single split AC unit installation runs £1,500–£3,000 including supply and fitting. Multi-room or ducted systems can push £5,000–£10,000+. Factors affecting price: property age (older Hampshire stock often needs extra work), F-Gas certified labour, and whether a new electrical circuit is needed.

Technically you can mount and wire some portable/window units yourself, but for split systems the answer is effectively no — handling refrigerants in the UK requires an F-Gas certificate (EU Regulation 517/2014, still enforced post-Brexit in GB). Doing it without certification is illegal and voids warranties. Hampshire homeowners must use a registered engineer.

A single split unit takes 4–8 hours for a competent F-Gas engineer. Multi-room systems typically take 1–2 days. Older Hampshire properties (Victorian/Edwardian terraces common around Winchester, Eastleigh, Fareham) can add time due to thicker walls for pipe routing.

In most cases, no. Domestic AC falls under permitted development as long as the outdoor unit isn’t on a wall facing a highway, is under 0.6m³, and sits more than one metre from the boundary. However, if your property is listed or within the curtilage of a listed building — common around Winchester and Romsey — you’ll almost certainly need listed building consent before proceeding. Always check with your local council: Winchester City Council, Southampton City Council, or Eastleigh Borough Council depending on your postcode.

Yes — most modern air conditioning systems are capable of delivering hot air as well as cold. This makes them a genuine year-round solution for Hampshire homes, not just a summer purchase.

UK law requires that air conditioning systems using refrigerant gases are installed by F-Gas certified engineers. While you can technically install a portable unit yourself, any fixed system that involves refrigerant pipework must be handled by a trained and licensed professional. Doing it without certification is illegal and will void your warranty.