Front Door and Side Panel - 0.87 or 1.1 W/(m²·K)

[NewToAllOfThis]

Our front opening is 1500mm wide by 2200mm high and leads straight into the hallway and upstairs. Underfloor heating downstairs.

 

Looking at either 0.87 or 1.1 W/(m²·K) versions. price difference for the 0.87 version is additional £1050

 

Any comments appreciated as to what the difference in heat loss will be in money terms and also what the general warmth / cold areas will be.

[JohnMo]

Heat loss difference is basically the area X temperature difference between indoor and outdoor.

 

So let's say the temp difference is 15 for the heating season.

 

15 x 3.3 x 0.87 = 43w

15 x 3.3 x 1.1 = 54w

 

Heat loss difference is 11w each hour for the heating season, say 180 days.

 

11w x 24 x 180 = 47 520w or 47.5kWh.

 

In financial terms £4.75 year heating saving at 10p / kWh.

 

Not sure how well insulated you are or airtight, spending the money difference there may be a better use of your money.