Our house has huge windows, which are great, but they do have their downsides: large heat loss in the winter and high solar gain in the summer. I was curious to see how much our windows contribute to the heat loss of our house, so I used the Heatpunk heat loss calculation tool to run some experiments.

Heatpunk tool: https://heatpunk.co.uk/

Our home system summary:
6.8 kWp solar array split E/W
5 kW Gen 2 GivEnergy hybrid inverter
14.7 kWh GivEnergy batteries
A2A heat pump heating/cooling system
Myenergi eddi hot water diverter
Fiat 500e EV

00:00 Introduction
00:33 Why are big windows a problem?
02:04 Octopus referral plea
02:48 Heat loss calculation with existing windows
04:07 Heat loss with small windows
05:18 Heat loss with triple glazing
06:28 Closing remarks

Please note that Tim is not a professional consultant, just an enthusiastic amateur, so cannot reply to requests for advice or opinions on specific systems or green investment opportunities. Thank you for your understanding.

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