About the ratings for 'Installing a ground source heat pump'

All Bloom actions are rated on CO₂ reduction, popularity, easiness and cost. The methodology behind each rating is defined below, along with further rating information for 'Installing a ground source heat pump'.

CO₂ reduction

The average emission reduction resulting from this action in the first 12 months, in kilograms or tonnes.

For this action:

1.8-6.4 tonnes of CO₂ per year per house, dependent on the type of fuel being replaced - or 0.8-2.8 tonnes per person (assuming an average of 2.3 people per house). Based on a semi-detached house.

Popularity

Number of registered Bloom users who have planted this action seed.

Easiness

How easy it is to complete the action, as rated by registered Bloom users.

Please note: during beta testing, this value has been editorially assigned. When enough users have rated an action, this will represent the average user rating

Cost

Average outlay required to initiate an action in £.

For this action:

A typical 6-8kW system costs £7,300-11,800 (excluding the cost of radiators and under floor heating); with an annual saving of £300-600, dependent on the type of fuel being replaced.

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