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Ask whether your home is a good fit
A heat pump can lower energy bills, but only if it is matched well to the property. Ask the contractor how they will assess your home’s size, insulation levels, and heat loss before recommending a system.
You should also ask whether your radiators, pipework, and hot water cylinder can work with a heat pump. In many UK homes, the answer depends on how efficiently the home retains heat.
Ask how much you are likely to save
Contractors should be able to give a realistic estimate of running costs. Ask them to compare your current boiler bills with expected heat pump costs based on your actual energy use.
It is also worth asking what assumptions they are using. For example, savings will vary depending on insulation, electricity tariffs, and how the system is controlled.
Ask about insulation and other upgrades
A heat pump works best in a well-insulated home. Ask the contractor whether you need loft insulation, cavity wall insulation, draught-proofing, or better glazing before installation.
Some properties may need only small improvements, while others may need more work to achieve good efficiency. A good contractor should explain which upgrades will have the biggest impact on lowering bills.
Ask how the system will be sized and controlled
An oversized or poorly set-up heat pump can waste energy and cost more to run. Ask how they will size the system and whether they will calculate the heat loss room by room.
You should also ask about controls, such as thermostats, weather compensation, and zoning. Proper controls can help keep the home comfortable without using more electricity than necessary.
Ask about installation quality and ongoing support
Installation quality has a big effect on performance and bills. Ask who will do the work, what accreditations they have, and whether they follow UK standards such as MCS.
It is also sensible to ask what aftercare is included. Find out whether they offer commissioning, maintenance advice, and help if the system does not perform as expected.
Ask about grants, warranties, and the long-term picture
Some UK homeowners may be eligible for support such as the Boiler Upgrade Scheme. Ask the contractor whether they can help you understand any grants or financial incentives available.
Finally, ask about warranties, expected lifespan, and servicing costs. A heat pump is a long-term investment, so knowing the full picture will help you judge whether it really will lower your home energy bills.
Frequently Asked Questions
Ask about system sizing, expected efficiency, installation quality, thermostat setup, ductwork condition, and estimated energy savings so you can compare proposals based on long-term operating costs, not just upfront price.
A qualified contractor should perform a load calculation to choose a properly sized system. An oversized or undersized heat pump can waste energy, reduce comfort, and increase monthly utility bills.
Efficiency ratings such as SEER2, HSPF2, and COP help estimate how much electricity the system uses. Higher efficiency usually means lower operating costs, especially when the contractor matches the equipment to your home.
Ask whether your ducts leak, need sealing, insulation, or resizing. Even a high-efficiency heat pump can lose performance through poor ductwork, which can raise energy bills.
The contractor should inspect insulation, windows, air leakage, duct condition, electrical capacity, and existing HVAC equipment. These factors affect whether a heat pump can reduce bills effectively in an older home.
Ask which federal, state, utility, or local rebates apply, whether the equipment qualifies, and if the contractor handles paperwork. Incentives can reduce upfront costs and improve payback time.
A contractor should explain how cold-climate models maintain efficiency in low temperatures, what backup heat is needed, and how that affects winter electricity use and monthly bills.
Ask how often filters, coils, refrigerant levels, and outdoor units should be checked. Regular maintenance keeps the system efficient, prevents energy waste, and helps avoid higher utility bills.
A contractor should recommend programmable or smart thermostat settings, explain when to use setback temperatures, and show how to avoid inefficient temperature swings that can increase energy use.
Ask who will install the system, what testing will be done, and whether airflow, refrigerant charge, and electrical connections will be verified. Proper installation is critical for achieving projected energy savings.
A contractor may review past utility bills, perform a home energy assessment, and compare your current heating and cooling costs with expected heat pump performance to estimate possible savings.
Ask whether your current ductless setup is efficient, if zoning can be improved, and whether additional indoor heads or controls would reduce wasted energy and better match room-by-room demand.
Compare equipment efficiency, load calculations, included labor, duct upgrades, warranty terms, and estimated yearly operating costs. The lowest bid is not always the best value if it leads to higher energy bills.
Ask whether the system uses electric resistance backup, gas backup, or another source, and how often it will run. Backup heat can affect winter energy bills if it is used too frequently.
The contractor can suggest zoning controls or ductless solutions to heat and cool only occupied areas. Better zoning reduces wasted energy in unused rooms and can lower monthly bills.
Ask which refrigerant the system uses, whether it affects efficiency, and whether the model is optimized for long-term performance. Better system design and correct refrigerant charge support lower operating costs.
A contractor may identify insulation gaps and air leaks that force the heat pump to work harder. Sealing and insulating the home can reduce the system load and lead to lower energy bills.
Ask what parts and labor are covered, how long the warranty lasts, and whether maintenance is required to keep coverage valid. A strong warranty protects your investment if energy savings do not meet expectations.
A contractor should explain how local winter and summer temperatures affect performance, what efficiency you can expect in your region, and whether a specific model is suited to your climate.
Ask how the system will be commissioned, what performance tests will be provided, and how you can monitor energy use afterward. Post-installation verification helps confirm that the heat pump is delivering the expected savings.
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