Six reasons not to buy a heat pump in 2022

5. They don’t cut bills very much

The potential savings from installing a heat pump depend on what type of system it is replacing.

Under normal circumstances, a heat pump costs £400 to £465 less than a G-rated gas boiler each year in a typical household. However, Class A gas boilers are still around £35 to £55 cheaper than a heat pump each year.

This is likely to change in the next decade. The government plans to move green electricity surcharges, which are currently levied on household electricity bills, to gas bills.

However, ministers are expected to phase in the changes over a period of up to 10 years, meaning gas will remain cheaper for the foreseeable future.

Air source heat pumps can become less efficient when the outside temperature is colder. According to Green Age, an energy conservation consultancy, an air source heat pump’s COP can be as low as two in winter, instead of the usual three.

This means that for every unit of electricity required to run the unit, the heat pump produces one unit of heat.

Gas boilers have a lower coefficient of performance than this, 0.85, but since gas is much cheaper than electricity, the cost is approximately similar.

6. They don’t work well in poorly insulated homes

When purchasing a heat pump, many households also have to factor in the cost of properly insulating their home.

Houses need to be well insulated for heat pumps to be effective as the units operate at lower temperatures and will therefore have difficulty heating and maintaining the house at temperature. They work better with lower temperature heating systems such as B. underfloor heating.

Around 25 million homes in the UK are not adequately insulated. Upgrading a poorly insulated home can cost thousands of pounds, but it ultimately pays off in lower energy bills.

Insulating an attic in a three bedroom semi detached house can cost between £300 and £350. To add cavity wall insulation, the same house could expect to pay between £450 and £500.

External insulation and plastering can cost between £8,500 and £15,000 for a three bedroom semi-detached house and internal insulation and plastering can typically cost between £5,000 and £7,000 for a house.

Read more about what our readers think about installing heat pumps here.

This article will be updated with the latest advice. Six reasons not to buy a heat pump in 2022

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