A couple I recently talked to told me that they had window manufacturers, insulation manufacturers, a ventilation system import company and a solar company telling them they could save with each of those products a minimum of 30% of their heating costs. If each of them could save 30%, then combined together they would not ever have heating bills again. Sadly, in reality it doesn’t work like that. The numbers you get from people selling products often tend to be the perfect case scenario for their particular product, not the actual measured average or much less your actual home.

This calculator is designed to help you assess the basics. Let’s say you are thinking of buying a solar photovoltaic (electric) system or upgrade your windows. You can enter all details below- your annual electricity charges (for solar), your annual heating costs (for the windows), what it costs, if there are government grants and so forth and the calculator will tell you how much each of those items would have to save you monthly to get your money back. This is a first sense check that says if you continue to live your life the same way as before the changes what your potential savings need to be.

If it passes this first sense check, get in touch and we can model your building up to actually give you a more accurate prediction if the product you are looking for has a positive return on investment or if another product is much more suitable for you. Check out our thermal modelling service here to find out more about financial return on investment for different products or see the Projects page for examples on what to look out for.

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*Please note, the calculator may not function properly on mobile devices. For the best experience, please use a desktop version.