Split and multi-split systems in Portsmouth
A free survey, a clear specification and a fixed price for split and multi-split air conditioning in Portsmouth.
- Free site survey and fixed written quote
- Unit sizes, refrigerant and price set out in writing
- Work planned around your opening hours
How much does a split air conditioning system cost in Portsmouth?
In Portsmouth, guide prices run from about £1,650 to £3,395 per system, plus VAT. A typical job (two-room multi-split) usually comes to £3,950–£6,850 plus VAT. You get a fixed written quote after the free survey.
A split air conditioning system has an indoor unit and an outdoor unit joined by refrigerant pipework.
Where we work around Portsmouth
Portsmouth is one of the main commercial centres in Hampshire, with city-centre offices, retail streets, hospitality venues and business parks on its edges.
Postcode districts we cover in Portsmouth include PO5. We also work in nearby Gosport, Fareham and Havant. Buildings across Hampshire range from converted period offices to modern units with deep ceiling voids, so we measure each site rather than relying on a standard package.
What the job covers
- Survey and unit sizing
- Wall-mounted, floor-standing or under-ceiling indoor units
- Outdoor unit on wall brackets, a flat roof frame or ground mounts
- Pipework in neat trunking or concealed routes
- Condensate drainage
Prices in Portsmouth
Prices below include our regional adjustment for the South East (15% above the UK guide).
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| Single split 2.5–3.5 kW | £1,650–£2,795 | £1,980–£3,354 | per system |
| Single split 5–7 kW | £2,250–£3,395 | £2,700–£4,074 | per system |
| Multi-split, 2 indoor units | £3,950–£6,850 | £4,740–£8,220 | per system |
| Multi-split, 3–4 indoor units | £5,695–£11,450 | £6,834–£13,740 | per system |
| Extra pipework beyond 5 m | £40–£75 | £48–£90 | per metre |
Ex VAT, supply and install with standard access.
How it works in Portsmouth
Survey
We size the unit to the room and agree indoor and outdoor positions and the pipe route.
Mount the units
Indoor unit on a mounting plate, outdoor unit on brackets or a frame with anti-vibration mounts.
Pipe and wire
Pipework, interconnecting cable and condensate are run and made off neatly. In Portsmouth we agree timings around your opening hours.
Test and commission
Pressure test, evacuation, any extra refrigerant charge, then commissioning and handover.
Before you book in Portsmouth
Outdoor unit position
Outdoor units need air flow and access, and should be away from neighbours' windows to keep noise down.
Neighbours and noise
Outdoor units near flats — common above shops — need careful siting so noise at neighbours' windows stays low. We choose positions and quieter units with that in mind.
Refrigerant rules
Since 1 January 2025, new single split systems holding under 3 kg of refrigerant in Great Britain cannot use refrigerant with a GWP of 750 or more — in practice, R32 or lower.
Leased premises
If your Portsmouth premises are leased, the landlord's written consent is usually needed for external units, wall penetrations and roof access. We provide drawings and data sheets for the request.
Typical premises in Portsmouth
- Warehouses and industrial: cooling for offices, mezzanines, control rooms and temperature-sensitive areas.
- Gyms and leisure: high-capacity cooling and fresh air for gym floors, studios and changing rooms.
- Retail and shops: comfortable shop floors, stockrooms and entrances, even with the door open.
- Salons and spas: comfortable salons and treatment rooms despite dryers, lamps and steam.
Compliance in England: refrigerant work falls under GB F-gas rules, and buildings with more than 12 kW of air conditioning in total need a periodic energy inspection (often called TM44).
Your questions answered
How much does a split air conditioning system cost in Portsmouth?
Guide prices in Portsmouth run from about £1,650 to £3,395 per system, plus VAT. A typical job (two-room multi-split) costs £3,950–£6,850 plus VAT. We fix the price in writing after a free survey.
Do you also cover Gosport, Fareham and Havant?
Yes. Alongside Portsmouth, we also cover Gosport, Fareham and Havant. Each has its own page with local guide prices.
Which postcodes do you cover in Portsmouth?
All of them, including PO5. Give us your postcode when you enquire and we will confirm the visit details.
Can a split system heat in winter?
Yes. Modern split systems are heat pumps and can heat efficiently down to well below freezing.
How much does a split air conditioning system cost for a business?
A single wall-mounted split typically costs £1,450–£2,950 plus VAT installed. Multi-splits with two to four indoor units are typically £3,450–£9,950 plus VAT.
Get a guide price for Portsmouth
Free survey and fixed written quote. We reply with a guide price or to book the survey.