Residential · UK

Domestic Air Con Installation

Domestic air con installation for UK houses, flats and apartments. Quiet 19 dB inverter splits sized to your rooms, tidy first-fix pipework where possible, dedicated fused spur from the consumer unit and F-Gas commissioning on the same day.

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From: £1,500 per room
Timeline: 1 day per room, 2–4 days for whole-home
Warranty: 5 years parts & labour

Why choose this

Ultra-quiet 19 dB indoor units ideal for bedrooms
Reverse-cycle heating with COP 4.0+ for year-round use
Neat first-fix pipework where accessible; discreet trunking elsewhere
5-year manufacturer parts & labour warranty registered on the day
Landlord method statement pack for leasehold flats included

What's included

Free in-home survey and heat-load calculation
Wall or floor-mounted indoor unit selection
Outdoor condenser on brackets or ground feet with acoustic pads
Dedicated fused spur from consumer unit (Part P notified)
Nitrogen pressure test, vacuum and F-Gas commissioning
Cleardown, warranty registration and handover pack

Who this domestic air con installation service is for

We deliver domestic air con installation for UK homeowners, landlords, tenants (with landlord consent) and self-builders installing air con in houses, flats, apartments and HMOs. Typical projects sit in the 2.0–7.0 kW per room band, and every scheme is designed by an F-Gas certified engineer against a full CIBSE Guide A heat-load calculation — never a rule-of-thumb watts-per-square-metre guess.

We cover the whole UK from London-based engineering hubs, with same-week surveys inside the M25 and 7–14 day lead times nationally. All work is delivered by directly-employed engineers rather than subcontractors, so the person who quotes your job is accountable for how it is installed and commissioned.

System types we recommend

For a single bedroom or living room we specify a wall-mounted inverter split — the Mitsubishi MSZ-LN Designer (19 dB, choice of pearl / ruby / silver / black finish) or Daikin Emura on premium jobs, the MSZ-AP or Daikin Perfera on value-led jobs. For whole-house coverage we design multi-split systems that share one condenser between two and five indoor units, or ducted systems that hide the indoor equipment in the loft or ceiling void. For flats with no external wall access we specify approved through-wall or internal water-cooled condenser solutions that meet leasehold restrictions.

Every specification is written against your actual building fabric, occupancy pattern and electrical capacity. We do not resell a single manufacturer — the design drives the equipment choice, not the other way around. If your incoming supply is constrained, we flag it at survey and offer a phased approach or a load-shedding controller rather than pretending the problem does not exist.

The survey, design and installation programme

A senior engineer attends site within 3–5 working days of enquiry. The survey covers heat gains (fabric, solar, occupancy, equipment), electrical capacity, condenser positioning, structural loading, acoustic constraints to neighbours, drainage routes and any planning/landlord constraints. Photos, measurements and load calculations feed into a written fixed-price proposal within 48 hours.

Once awarded, we produce a full drawing pack — pipe routes, electrical schedule, condenser structural loading, refrigerant volume and BS EN 378 risk assessment. Installation runs to a published programme with daily photo updates. Commissioning follows BSRIA BG 49 with a full test-and-balance report, an F-Gas record and manufacturer warranty registration on the day of handover.

Costs, timeline and running expenses

Domestic Air Con Installation typically starts at £1,500 per room for a compact single-zone scheme. Multi-zone and specialist projects scale with equipment tonnage, condenser positioning complexity and any out-of-hours working requirement. Programme duration is 1 day per room, 2–4 days for whole-home. We quote fixed prices — nothing is added on site without written change control.

A 2.5 kW bedroom split running 8 hours a night in summer uses about 3.6 kWh (£1.10 at 30 p/kWh). Used as a heat pump through spring and autumn it delivers 3.5–4.5 kW of heat per 1 kW of electricity — comfortably cheaper than gas central heating in mild weather and dramatically cheaper than direct electric or oil. Modern R-32 inverter equipment routinely delivers seasonal efficiency ratings (SEER) between 6.5 and 8.5, which is 30–50% better than the R-410A systems installed a decade ago. On heat-pump duty, coefficients of performance (COP) sit between 3.5 and 4.5 in UK conditions — comfortably ahead of gas heating on marginal-cost pence-per-kWh once carbon pricing is factored in.

Compliance, warranties and aftercare

Every installation is notified under Building Regulations Part P (electrical) and Part L (energy) where applicable, and lodged with the appropriate competent-person scheme. Systems containing 5 tCO₂e or more of F-Gas refrigerant require statutory annual leak checks under Regulation EC 517/2014 — we hold the F-Gas company certificate and can act as your Responsible Person, keeping records for HMRC and Environment Agency inspection.

Equipment carries a 5-year manufacturer parts warranty (compressor included) when installed by an accredited engineer. We register the warranty on the commissioning day so there is nothing for you to file. Our installation workmanship carries a 12-month cover-all warranty, and PPM service plans start at £110 per outdoor unit per year — sufficient to preserve manufacturer cover and catch drift before it becomes downtime.

Brands we install and why

Mitsubishi Electric (MSZ-LN, MSZ-AP), Daikin (Emura, Stylish, Perfera), Panasonic (Etherea), Fujitsu (Nocria X, ASYG), LG (Artcool Gallery) and Samsung (WindFree Elite) cover 95% of our domestic installations. Every unit is selected for low noise, high seasonal efficiency and strong heat-pump performance in UK winter conditions.

All refrigerant work uses R-32 (GWP 675) as standard, with R-454B (GWP 466) available on request for future-proofing against the F-Gas phase-down schedule. We steer clients away from R-410A (GWP 2088) for any new install — the refrigerant is being progressively withdrawn from supply and top-up costs will rise sharply between 2026 and 2030.

Working around your operation

Downtime is the hidden cost of any air conditioning project. We routinely deliver work in evening slots (18:00–02:00), Sunday shutdowns and staged week-by-week phasing so your day-to-day operation continues unaffected. Overnight and weekend working commands a modest 10–20% uplift which we itemise transparently at quotation.

Dust management, negative-pressure containment and daily photo close-out reports are standard for any works in occupied premises. Where a phased approach is chosen, we deliver temporary cooling (portable spot coolers or hire chillers) to bridge critical zones during the transition — priced separately so you can choose whether the resilience is worth the line item.

Flats, leasehold consent and freeholder-friendly options

Installing domestic air con in a flat requires written freeholder or managing-agent consent before we drill walls or bracket external equipment. We prepare a full method statement covering core-drill diameters, refrigerant volumes, fire-stopping through compartment walls, external bracket loading and neighbour acoustic impact — the pack most freeholders ask for as a standard.

Where the lease prohibits external condensers on balconies or walls, internal water-cooled condensers vent warm air through the kitchen extractor route or a discreet louvre. Efficiency drops slightly (SEER around 5.5 versus 7.0+ for standard splits) but the entire installation stays inside the flat and stays freeholder-compliant. For permitted external mounting we use low-vibration brackets with acoustic pads and position condensers below any neighbour's window line where the elevation allows.

Bedrooms, home offices and open-plan living areas

Bedrooms are the most sensitive noise environment in the house, which is why we default to Mitsubishi MSZ-LN or Daikin Emura in sleeping spaces — both hit 19 dB on lowest fan speed, quieter than a whisper. Sizing matters more than headline capacity: a 3.5 kW unit in a small bedroom short-cycles on and off, which wastes energy and creates noticeable temperature swings. A correctly-sized 2.0 kW unit runs continuously at low output, holds temperature within 0.5 °C and uses less electricity overall.

Home offices benefit from occupancy-linked control — the system idles when the room is empty and ramps to setpoint within 3–4 minutes of you sitting down. Open-plan kitchen / living / dining spaces are almost always better served by a single 5.0–7.0 kW ducted unit than multiple wall-mounted splits, because a single unit avoids the cold-air draughts that occur where two units' airflow patterns meet.

Why choose us for this work

We are F-Gas certified installers with directly-employed engineers, fully insured to £10m public liability and £5m professional indemnity. Every project comes with a fixed price, a written programme, a photo record and a 5-year warranty on equipment plus 12 months on workmanship. We publish real client references on request — not gated behind a form.

Request a quote online and we will book a site survey. Same-week surveys inside the M25, 7–14 day lead times nationally, and a qualified engineer attending the survey rather than a scripted call-centre operator.

Frequently asked questions

How much does domestic air con installation cost?＋

Fully-fitted prices start at £1,500 per room. Multi-zone and specialist projects scale with equipment tonnage and installation complexity. All quotes are fixed price — no on-site supplements.

How long does the installation take?＋

1 day per room, 2–4 days for whole-home

Do you handle Building Regulations sign-off?＋

Yes. Part P electrical work is notified via our NAPIT/NICEIC scheme and Part L energy compliance is documented in the commissioning pack. You receive certificates on the day of handover.

What refrigerant do you use?＋

R-32 as standard (GWP 675). R-454B (GWP 466) is available on request for maximum future-proofing against F-Gas phase-down. We do not install R-410A for new schemes.

Do you offer service and maintenance plans?＋

Yes — PPM plans start at £110 per outdoor unit per year and include filter cleans, coil disinfection, drain-line flush, refrigerant pressure check and electrical inspection. Statutory F-Gas leak checks are included on qualifying systems.

What warranty applies?＋

5-year manufacturer parts warranty on equipment (compressor included) plus 12 months workmanship warranty on our installation. Annual servicing preserves manufacturer cover.

How much does domestic air con installation cost?＋

A single-room wall split fully installed starts at £1,500–£2,200. Multi-room systems land at £4,500–£9,500 depending on the number of indoor units and pipe run complexity.

Will installation damage my walls or décor?＋

Core drills are 65–80 mm through the wall — clean, sealed and rendered on completion. Pipework runs in white trunking where a hidden route is not available. We dust-sheet the room and vacuum before we leave.