Heat Loss Calculation Information

Heat Loss Calculation Information

A heat loss calculation survey ensures the system is sized correctly for your property; it can be considered as the foundation for the heating system. If the heat pump is sized incorrectly, whether that is undersized or oversized, then you may suffer from comfort problems, high running costs and possible faults and failures over time.

The calculation works out the peak heat load of the property by measuring all of the fabric and ventilation heat losses for the coldest day of the year based on geographical location, it also works out all of the heat losses for each room and then allows you to correctly size the emitters for those rooms, whether they be radiators, underfloor heating or fan convectors to keep your whole home at your designed temperature, ensuring that you only pay for what you need.

The surveyor needs to input the data and measurements into the heat loss calculator software, once complete the calculator will give us the peak heat loss. The data will comprise of the areas of the walls, floors, roof, windows and doors and their corresponding thermal efficiencies or U values.

A heat pump will be selected based on its kW rating compared to the kW heat loss of the building, always ensuring that the heat loss capability of the heat pump is higher to ensure comfort.

The outcome of any good heat loss assessment should be a specification for a correctly sized heat pump, providing for the lowest possible flow temperature, running through correctly sized pipe work at designed flow rates with the right emitters, providing you with a warm home, running efficiently, saving you money, and lowering your carbon footprint.

We only use government-approved, independent surveyors to carry out the heat loss survey. It is likely to cost between £360-£420 if a new Energy Performance Certificate (EPC) is being done for the property at the same time. An EPC showing no recommendations to install cavity wall and/or loft insulation is a requirement for claiming the Boiler Upgrade Scheme voucher. A heat loss calculation survey alone will cost around £330-360. As we use independent surveyors, those prices are set by the surveyor themselves and are subject to change.

The cost of the heat loss & EPC will be deducted from the final cost of installation if Solum GB completes the installation. The heat loss and EPC is yours to keep, and you can share it with other companies to get quotations.
As an MCS accredited installer, we are required to provide you with a system that meets 100% of your hot water and heating demand. MCS certifies low-carbon products and installations used to produce electricity and heat from renewable sources.

Membership of MCS demonstrates adherence to these recognised industry standards, highlighting quality, competency and compliance.

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