Gas Flue and lean-to

[PThomas]

Hi All

We have 10 year old house with a gas boiler.
I'm currently planning a lean-to on the back of the house, across the kitchen area.
The lean-to will extend the width of the house which is approx. 4.8m, however the flue from the boiler would end up under the lean-to.
It will be constructed from 16mm polycarbonate triplewall. Distance from flue to roof will be over 300mm, probably over 500mm.

As the lean-to is not enclosed (Only the house wall), will there be any issues with the flue position?

Thanks in advance for suggestions and advice.

 

[45yearsagasman]

If you'd give the exact model it would help. Some boilers are allowed under a lean to / car port with open ends.

 

[PThomas]

It's a ideal icos he15 model.

 

[45yearsagasman]

Below balconies or a car port roof. 25mm (1")*
BS5440-1 2000 200mm (8")

Extracted from inst instructions

I would interpret that as a yes providing the lean to is open both ends.

 

[swbjackson]

It my be allowed but the lean to will probably be dripping with condensation. The clearances to openings also increase to 1200mm from 300mm when under a car port and I would view this lean to as a similar situation.

 

[PThomas]

It my be allowed but the lean to will probably be dripping with condensation. The clearances to openings also increase to 1200mm from 300mm when under a car port and I would view this lean to as a similar situation.

Why would you view this as a car-port?
It's open on 3 sides.

 

[harry0harry]

Hi you quoted,The lean-to will extend the width of the house which is approx. 4.8m.
Is there a fence,wall or other any physical boundary on the sides of the proposed lean to ?.
Everything is possible but a photo of the rear of your house would be an advantage,then you will get a definitive answer.

Good luck.

 

[PThomas]

Hi you quoted,The lean-to will extend the width of the house which is approx. 4.8m.
Is there a fence,wall or other any physical boundary on the sides of the proposed lean to ?.
Everything is possible but a photo of the rear of your house would be an advantage,then you will get a definitive answer.

Good luck.

I will look into a photo.
There are fences both sides, approx. 6ft. There will be a clear 2ft min gap between top of fence and bottom of lean-to. The lean-to will not be right up against the fences, there will be a gap of > 6" at least.