THE BRISTOL FIELD GUIDE / AIR SOURCE HEAT PUMPS
A heat pump can fit outside while its pipe route back to the heating system remains awkward. Sketch both ends of the run for a Bristol quote.
START WITH THE PROPERTY
On a Bristol plot with a small outside area, the outdoor unit might fit while the route back to the heating plant is awkward. Photograph the likely wall entry and any level changes between the two.
BEFORE YOU ACCEPT A QUOTE
A complete price should show pipe length, penetrations, insulation, drainage and reinstatement. If the designer has assumed a route through a finished room, ask to see it before the quote becomes an order.
LOCAL COST EVIDENCE / OCTOBER 2026
A quoted installation price depends on the work inside the home. Electricity use depends on the finished design and tariff.
We could not verify a representative local average for a fully installed, family-sized system. Published installer figures mix starting prices, example homes and different scopes. Averaging them would suggest more certainty than the evidence allows.
For a useful comparison, ask each installer to itemise the heat pump, cylinder, radiator changes, electrical work and commissioning, then show the price before and after any eligible grant.
about £730approximate annual cost if the October–December 2026 unit rate lasted a full year
This is a model, not a measured bill or an average for families with heat pumps. It starts with 9,985 kWh, the 2024 mean annual domestic gas use per meter in Bristol, City of. We apply 85% boiler efficiency and a heat pump seasonal performance factor of 3.1, then price the electricity at 26.58p per kWh in South Western England.
Calculation: 2024 mean gas kWh per domestic meter × 0.85 ÷ 3.1 × Ofgem electricity unit rate. The result is rounded to the nearest £10. It assumes the gas meter's entire use was for heating and hot water, so cooking and other gas use can make it too high. It does not include existing electricity standing charges, servicing, or changes to your other electricity use.
Gas consumption is by local authority, except London, which uses the London region. Oxfordshire combines its five districts by gas-meter count. The electricity rate follows the distribution region for the place; Oxfordshire spans two regions. Actual cost depends on your heat-loss survey, hot-water use, chosen tariff, controls and the installed system's measured performance. Ask the installer for a property-specific annual estimate.
ILLUSTRATIVE QUOTE COMPARISON
One installer uses the closest outside position but leaves internal making good provisional.
Another draws a longer external run with specified insulation and wall entry.
Walk both routes at the property. Compare drainage, heat loss, appearance and reinstatement before deciding which price is complete.
ANOTHER PROJECT AT THE SAME ADDRESS?
NEXT STEP IN BRISTOL
Fuel use, radiator sizes and a heat-loss report if you have one help the designer judge performance. A tidy pipe route alone does not show whether every room will be warm.