Heat Loss Calculations and Heating Design From Just £1000
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What is a Heat Loss Calculation?
A Heat Loss Calculation makes sure your new heating system is the perfect fit for your home. By looking at how your property is built – including insulation, windows, doors, and floors – we can see how much heat each room loses.
This helps us:
- Choose the right size radiators or heaters for every room
- Recommend the most efficient boiler or air source heat pump (ASHP) for your whole home
- Keep you warm and comfortable while saving money on your energy bills
In short, it’s the smart way to design a heating system that’s built around your home and your comfort.


Why choose a ServiceMy Heat Loss package?
Before installing any heating system, it’s essential to complete a Heat Loss Design. This ensures your engineer can correctly size the radiators and other heat emitters in each room.
For gas combi boilers, room-by-room calculations are helpful but not always critical, as these systems are more forgiving. However, with Air Source Heat Pumps (ASHPs), accurate Heat Loss Calculations are vital. Without them, your property could end up with the wrong size radiators or even the wrong size heat pump, which can affect comfort and efficiency.
Our experienced Assessors and Surveyors provide detailed Heat Loss Surveys with a fast turnaround, giving you confidence that your heating system will be designed to perform at its best.
What is MCS sign off?
MCS sign off is your proof of quality when an Air Source Heat Pump is installed.
Why is MCS sign off important?
- Quality assurance – It proves your system has been designed and installed by an approved installer who meets strict standards.
- Peace of mind – You know your system is safe, reliable, and built to perform.
- Access to funding – Many grants and incentive schemes (such as the Boiler Upgrade Scheme) require your system to have MCS certification.
- Better efficiency – Correct design and installation means your system will run at maximum efficiency, saving you money on bills.

FAQs
A Heat Loss Design is a calculation that shows how much heat each room in your home loses through walls, floors, windows, and doors. This ensures your heating system is designed correctly and that radiators or other heat emitters are sized properly.
ASHPs are highly efficient but much more sensitive to heat demand. A Heat Loss Calculation ensures the correct size of radiators and heat pump are installed so your home stays warm and the system performs as it should.
The survey itself is usually completed in a single visit, and we provide a full detailed report with a quick turnaround.
Yes. By making sure your heating system is correctly sized, you avoid wasted energy, lower your bills, and improve comfort throughout your home
Have More Questions?
Our dedicated team is here to assist with all your heat loss and heating design requirements. Contact us today to discuss how we can help.
