wood burner and back boiler

[aitch]

The legal requirement under the building regs is for a 6 inch flue unless the stove is Defra approved to burn wood in a smoke control area and has a 5 inch outlet. Then a 5 inch liner can be used.

 

Most if not all stoves of the heat output you need would have a 6 inch or larger flue, very very few are Defra approved. You could have it installed without a liner if the chimney is assessed as sound by the installer but you wont get the efficiency out of it that you would with a liner, the stove wont pull as hard. A bit like driving your car in third gear all the while.

 

Sounds like the first steps are to get quotes for the install and plumbing work, then see if the installer can drop a 6 inch liner down before going forward.

 

A

 

It is a defra approved one, I'm in a smokeless zone but it sounds like 6" is pretty standard. I've had someone who's come recommended round and he's done a smoke test and the chimney is sound but advised to get one for peace of mind and efficiency like you have said.

[aitch]

We now supply all heating and hot water from a high-efficiency wood stove & boiler combo tied to an 800 ltr thermal store. Heating is downstairs via under floor heating from the store and hotwater is via a coil in the top of the store

 

I think you've got it right. We can't fit that size tank anywhere though so we're just going to insulate everywhere we can and get an efficient boiler.