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Air Source Heat Pump Installation in Bristol

The most popular choice for Bristol homes. Efficient, quiet, and eligible for the full £7,500 government grant.

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How It Works

How Air Source Heat Pumps Work

A simple 4-step cycle that extracts free heat from the outdoor air.

1

Absorb

The outdoor unit absorbs heat from the air — even at temperatures as low as -25°C.

2

Compress

A compressor concentrates the absorbed heat, raising it to a usable temperature.

3

Transfer

The heat is transferred to your central heating system and hot water cylinder.

4

Expand

The refrigerant expands and cools, ready to absorb more heat from the air.

Benefits

Why Choose an Air Source Heat Pump?

Lower Energy Bills

Save up to £327/year vs gas with a heat pump tariff.

£7,500 Government Grant

The BUS grant is deducted directly from your invoice.

Eco-Friendly

Cut your carbon footprint by up to 70% compared to gas.

Works to -25°C

Modern ASHPs operate efficiently in all UK weather conditions.

15–25 Year Lifespan

Significantly longer than a gas boiler (10–15 years).

EPC Improvement

Boost your EPC rating and add ~£11,000 to your property value.

Local Expertise

Why ASHPs Are Perfect for Bristol Homes

Bristol's mild winters (average 2°C) mean air source heat pumps achieve an excellent Coefficient of Performance (COP) of 3.5–4.0. This makes them significantly cheaper to run than in colder parts of the UK.

Compact units suit terraced houses. Modern ASHPs are about the size of a washing machine and can be wall-mounted or floor-standing. Even the narrow rear gardens typical of Bristol's Victorian terraces in BS3, BS6, and BS7 have enough space.

Conservation area compliant options. With 33 conservation areas in Bristol, we specialise in discreet installations using low-noise models like the Samsung EHS Quiet (35 dB) and acoustic screening where needed.

Costs

Air Source Heat Pump Costs in Bristol

Prices include installation. The £7,500 BUS grant is deducted directly from your invoice.

Property HP Size Before Grant After Grant
Flat / 1-2 Bed Terrace 5–6 kW £8,000–£10,000 £500–£2,500
3-Bed Semi-Detached 7–10 kW £10,000–£12,000 £2,500–£4,500
4-Bed Detached 10–12 kW £12,000–£14,000 £4,500–£6,500
5+ Bed Large House 12–16 kW £14,000–£18,000 £6,500–£10,500
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Brands We Install

Popular Air Source Heat Pump Brands

Mitsubishi

Ecodan R32

The most installed heat pump brand in the UK. Proven reliability with excellent after-sales support and parts availability.

~40 dB 5–14 kW

Vaillant

aroTHERM Plus

Uses natural R290 propane refrigerant and delivers 75°C flow temperatures — ideal for Bristol's Georgian and Victorian homes with high ceilings.

54 dB 3.5–19 kW

Samsung

EHS Mono HT Quiet

One of the quietest heat pumps available at just 35 dB. Perfect for Bristol terraced houses where noise sensitivity is important.

35 dB Various

Daikin

Altherma 3

Japanese engineering with exceptional cold-weather performance. Operates efficiently down to -28°C with R32 refrigerant.

~38 dB Various

The Process

How We Install Your Heat Pump

From first contact to cosy home — here's what to expect.

1

Free Survey

We assess your property, calculate heat loss, and recommend the right system.

2

Detailed Quote

Transparent pricing including all works, grant deduction, and finance options.

3

Grant Application

We apply to Ofgem for the £7,500 BUS grant on your behalf.

4

Installation

3–5 day professional installation by our MCS-certified engineers.

5

Commissioning

System testing, handover, and ongoing support.

FAQs

Air Source Heat Pump Questions

How does an air source heat pump work?
An air source heat pump extracts heat from the outside air — even when it's as cold as -25°C — and transfers it into your home. It works like a fridge in reverse, using a refrigerant cycle to absorb and concentrate heat. For every 1 kWh of electricity used, a heat pump delivers 3–4 kWh of heat.
Are air source heat pumps noisy?
Modern air source heat pumps are very quiet. Units like the Samsung EHS Quiet operate at just 35 dB — quieter than a library. The Worcester Bosch Compress 5800i is even quieter at 32 dB. We always recommend and install low-noise models, especially for terraced houses in Bristol.
Will an air source heat pump work in Bristol's climate?
Absolutely. Bristol's mild winters (average 2°C) are ideal for air source heat pumps, which operate efficiently down to -25°C. In fact, Bristol's climate means your heat pump will achieve a higher Coefficient of Performance (COP) compared to colder regions of the UK.
How much space does an air source heat pump need?
The outdoor unit is roughly the size of a washing machine (about 1m x 1m x 0.4m). It needs to be positioned outside with good airflow — typically against an exterior wall. Even small Bristol terrace house gardens have enough space.
Can I get an air source heat pump in a conservation area?
Yes, but you may need planning permission in Bristol's 33 conservation areas. We specialise in discreet installations using acoustic enclosures and low-profile units. We handle the planning process for you.
What size air source heat pump do I need?
The size depends on your property's heat demand. A typical 3-bed Bristol semi needs 7–10 kW, while a larger 4-bed detached house might need 10–12 kW. We perform a detailed heat loss calculation during our free survey to get the sizing exactly right.
How long do air source heat pumps last?
Air source heat pumps typically last 15–25 years with proper maintenance — significantly longer than a gas boiler (10–15 years). Annual servicing keeps them running at peak efficiency. We offer servicing plans for all installations.
What are the running costs compared to gas?
With a heat pump-specific tariff like Octopus Cosy, a typical Bristol 3-bed semi saves around £327 per year compared to gas. Oil and LPG replacements save even more — up to £1,100 per year. From April 2026, electricity prices are dropping further, improving the savings.

Ready to Join Bristol's Green Heating Revolution?

Get a free, no-obligation quote and find out how much you could save with a heat pump and the £7,500 government grant.

Get a Free Quote Call 0117 000 0000

Ready to save £7,500 on your heat pump?

Get a free, no-obligation quote from Bristol's MCS certified installers.

Get a Free Quote Call 0117 000 0000