Extraction from an Inglenook

thebullsback

Hi all,advice needed please.
We live in a terrace house built around the 1900s and in the kitchen dinner is a Inglenook where we have put our gas hob.
The previous owner has a built in extractor fan above the hob which vents into the chimney void via a charcoal filter .
I want to change this set up and fit a more powerful extractor and vent the air out through trunking along the top of our kitchen units to an outside wall about five foot away .
Anyone ever tried to drill through the side of a chimney breast before ? How thick is it .
Thank you for reading

sew_what

Why do you want to vent sideways? up the chimney is much simpler!
The sides of our chimney breast is two bricks thick - about 9 inches, but you'll have to open up the void to redirect the extractor.

thebullsback

what do i need to go straight up ?Are there any regs .

Rockingit

In the strictest sense there are no regs for this as 1) it's domestic and 2) not new build. If the chimney ultimately vents to fresh air (ie, it's not been capped off) then you're fine. You might want to fit a short length of duct (normally 125 or 150mm for cooker hoods) vertically to give the whole thing a head start up the run but you're fine - nature and physics will do the rest! Just make sure you get a decent resealing around the entry point.

CKdesigner

DO NOT VENT A COOKER HOOD INTO A CHIMNEY!!!

By venting a cooker hood into a chimney without consulting a professional, experienced in ducting extraction systems up chimneys (which is extremely costly to do it correctly) then you are putting several pieces in place to have a serious house fire!

Consult a builder to see whether the side wall of the chimney can be core drilled (usually fine) for ducting the cooker hood sideways - this is the simplest and correct way to do it in a domestic situation.

As I say do not go up the chimney - it is completely the wrong thing to do!

CK