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Nbishara. I have recently read about a Passivhaus that had been built for a couple, called the Denby Dale project. The one thing I noticed, was that it had 300mm of insulation fitted. I appreciate the feedback from people on here, but as I don't yet understand how to calculate the U values...

I'm not 100% sure on the exact setup that he has, but I think he uses the GSHP mainly for hot water and he has some other heat pump for a ventilation system that heats the home. Maybe he didn't need the other thing with the GSHP, but I don't know at the minute. Do you have a link of where the...

mointainwalker. The electric heat pump is something to do with the heating of the house. I agree that I don't know much (but should) about U values, but all I have done is adhered to what the BCO has told me to do. I know what is needed, but what I would like to know is exactly how U values...

Inky Pete. There are five areas that are used for calculating heat loss and they are the floor, walls, roof, windows and doors. Although doors and windows (including roof windows) are part of the main structure they have to be included in the calculations as well. The reason for this is...

Hi jeds. This is the reason why I posted on here. I wanted to get some feedback from other people on ideas/experiences that they have. I will definitely look into SIP panels. The plan was to construct it out of timber frame with either 150/200mm external walls and instead of part filling...

Windows and doors. Unless you like it dark and never go out.

Hi. I am going to be building my own property next year and have plans to start my own new build construction company after my own build has been completed. The main requirement that I need is for the property to be as energy efficient as possible. Regulations are changing frequently and as...