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- TL;DR Summary
- Is it possible to calculate heat loss improvements by knowing how the surface temperature changed?

Hello,

My house has some heat loss. As an example I know the outside door temperature. How can I calculate the heat loss delta if I reduce the door temperature by 1 degree?

I know that there is a formula to calculate a heat loss based on the U-value of a fabric. But I can't get those values as the walls and even doors are not made from a solid material. So in most cases it is not possible for me to get U-values.

So I thought if it is possible to calculate it based on temperature of surfaces?

* Ambient temp: -2°C

* Door outside temp 4°C

* Door inside temp 20°C

* Door height: 2.2m

* Door width: 0.8m

How many watts could be saved by decreasing heat loss if I insulate the door and its outside temperature drops to 3°C ?

I need this to reason the house insulation in many places to my landlord. As now he is not sure if it makes sense but I pay a lot on my electricity bills.

I would appreciate any help with this.

My house has some heat loss. As an example I know the outside door temperature. How can I calculate the heat loss delta if I reduce the door temperature by 1 degree?

I know that there is a formula to calculate a heat loss based on the U-value of a fabric. But I can't get those values as the walls and even doors are not made from a solid material. So in most cases it is not possible for me to get U-values.

So I thought if it is possible to calculate it based on temperature of surfaces?

**Details:*** Ambient temp: -2°C

* Door outside temp 4°C

* Door inside temp 20°C

* Door height: 2.2m

* Door width: 0.8m

How many watts could be saved by decreasing heat loss if I insulate the door and its outside temperature drops to 3°C ?

I need this to reason the house insulation in many places to my landlord. As now he is not sure if it makes sense but I pay a lot on my electricity bills.

I would appreciate any help with this.