Many reversible air conditioning systems are air-to-air heat pumps. They transfer heat rather than creating it directly, but suitability depends on the building and intended pattern of use.
What this service usually involves
- Seasonal efficiency and performance at lower outdoor temperatures
- Whether supplementary heating remains necessary
- Air distribution between rooms
- Running-cost comparisons based on your tariffs and usage
What a useful quote should cover
Ask for the same scope from every company: rooms or zones, outdoor position options, pipe and drain routes, electrics, access, working hours, VAT, exclusions and warranty route. A low headline total with vague allowances is harder to compare than a complete written proposal.
Compare evidence, not badges
Ask each business for the legal name that will contract with you, relevant individual and company credentials, insurance details, equipment schedule, exclusions, warranty route and payment terms. Verify evidence with the issuing body where possible. Read what we check and what you should verify.
Related next steps
- Estimate installation cost or plan servicing
- Use the quote comparison checklist
- Browse installers by area
Related guides
- Air-to-air heat pump vs air conditioner
- Air Conditioning Running Costs in the UK
- How to choose air conditioning size and capacity
- Quiet air conditioning and outdoor-unit noise
- Air Conditioning Planning Permission in England
- Bedroom air conditioning for London and Essex homes
- Air-to-Air Heat Pump Grant UK: BUS in 2026
- Air Conditioning VAT in the UK
- Mitsubishi Heating and Air Conditioning in the UK
- Daikin Altherma vs Air Conditioning in the UK
- Can Air Conditioning Heat a Room in the UK?
- Can Air Conditioning Replace a Boiler in the UK?
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Useful official references
- GOV.UK: fluorinated gas guidance collection
- The Fluorinated Greenhouse Gases Regulations 2015
- Energy Saving Trust: air-to-air heat pumps
- Met Office: UK climate averages
- Planning Portal: air conditioning
- GOV.UK: Approved Document O overheating
- UK Health Security Agency: hot weather and health
- Ofgem: energy price cap
- CIBSE knowledge resources
- ASHRAE datacom resources
- Leasehold Advisory Service
- GOV.UK: air conditioning inspections for buildings
- UKHSA: Heat mortality monitoring report, England 2025
- UKHSA: Beat the heat, staying safe in hot weather
- GOV.UK: Heat summary, climate policies and indoor health