Heat Trust has developed a Heat Cost Calculator that allows a heat network customer to gain an indication of the annual heating and hot water cost for a similar-sized property if it had a modern gas boiler.

It has been developed specifically for use by residential heat network customers only.

It will be most relevant to new build properties that are heat-metered. The results are for information purposes only and it will not provide a bespoke assessment for your particular situation.

To accompany the Heat Cost Calculator, we have developed an accompanying customer information sheet to explain the difference between heating and hot water costs associated with a gas boiler compared to district heating. The Heat Cost Calculator assumes that the supplier is not only responsible for the supply of heat and the operation of maintenance of the network – but also the maintenance of equipment within the customer premises for the lifetime of the network, including the Heat Interface Unit. Customers should note that contractual terms vary from heat network to heat network. What is and what is not covered in your heat charges will vary on a case by case basis. The results returned by this calculator should therefore be read alongside the terms and conditions of supply for the relevant heat network. A suite of frequently asked questions has also been prepared and all the background assumptions are available in a further information document. Please use the links to the tabs on the left to access each of these documents.

9th November 2022 UPDATE - GAS PRICE ASSUMPTION:  The Heat Cost Calculator tool now uses the direct debit Energy Price Guarantee (EPG) regional unit rates (including VAT at 5%) for domestic gas as the best model of a typical domestic gas price. These can be found here. These rates are in place from 1st October 2022 until 31st March 2023.

We are looking to develop the Heat Cost Calculator further to provide a comparison against electric heating at a future date. We undertook a consultation seeking views on this in May - July 2019, specifically seeking feedback on the formulas that could be used. Please click this link to read the consultation document: Electric Heat Cost Calculator consultation. Please click this link to read the responses: Electric Heat Cost Calculator responses.