Rangehood installation, angled ceiling

[Shacklife]

Hi all,
In the kitchen of my shed-house is a gas stove/oven but no rangehood or extractor fan - I would like to install one. I plan on replacing the gas unit with an electric one, and an induction cooktop.
The ceiling is Colourbond at a ~40° angle, with just a 90mm cavity between that and the roof, corrugated gal sheets. I'm not sure how to approach a solution.

My question is, how should I go about building a rangehood to suit, with coverage for a 60cm cooktop? What should I be looking for in terms of a fan, hood and vent?
I'd welcome rough ideas or specific products, am hoping to source most second hand and happy to construct a cowl etc in timber where possible.

Cheers,
Rob
20241208_125310.jpg

[ForeverYoung]

the solution to the slope is you make an oval hole so the flue (if round) can be vertical.
if a square/rectangle flue then similar but different - not sure what shape you call it.
in the past I just made a template to get the hole shape right, but there are probably google answers if you put in the flue size and roof angle.

as for the rangehood itself - get one that sucks, literally.
see a demo and make sure it can suck & hold an A4 piece of paper.

width - to match your cooktop.
height above cooktop - as per safety specs - they are different for gas and electric.

one thing to remember is you want the flue above the roof to be high - in fact, higher than your ridgeline, otherwise it won't draw as well as it should; but you rarely see anyone do it.

[ErrolFlynn]

how should I go about building a rangehood

That would be quite a project. Consider buying one and save yourself work and possibly troubles.

I've only fitted one rangehood. It leaked on the first downpour. And I thought I was being so careful. Tried to fix it - failed. Called in a roof plumber - okay for a while, then it leaked. Called in another roof plumber and got it fixed.

I promised myself if I ever fit another one it's not going through the roof. It'll be going through the wall where it's protected by the eaves.

[r3nov8or]

That would be quite a project. Consider buying one and save yourself work and possibly troubles. ...

I think the problem here is that, judging by the steel splashback, the roof/ceiling starts at around about the start/underside of a legal rangehood, and you won't find one off the shelf with that profile.

@Shacklife, can you confirm the distance from the hob to the ceiling measured at the splashback...

[Shacklife]

I think the problem here is that, judging by the steel splashback, the roof/ceiling starts at around about the start/underside of a legal rangehood, and you won't find one off the shelf with that profile.

@Shacklife, can you confirm the distance from the hob to the ceiling measured at the splashback...

Between the hob and ceiling is 570mm.

Thanks for the other suggestions, much appreciated.

[yvan]

Hi all,
In the kitchen of my shed-house is a gas stove/oven but no rangehood or extractor fan - I would like to install one. I plan on replacing the gas unit with an electric one, and an induction cooktop.
The ceiling is Colourbond at a ~40° angle, with just a 90mm cavity between that and the roof, corrugated gal sheets. I'm not sure how to approach a solution.

My question is, how should I go about building a rangehood to suit, with coverage for a 60cm cooktop? What should I be looking for in terms of a fan, hood and vent?
I'd welcome rough ideas or specific products, am hoping to source most second hand and happy to construct a cowl etc in timber where possible.

Cheers,
Rob
20241208_125310.jpg

We live in a colonial cottage and our kitchen has a sloping ceiling similar to yours ,except that the height of the vertical wall behind our stove is 1,000mm only!
To be efficient a hood/extractor fan needs to have more or less the same surface area as the cooktop itself and stands exactly above it. A hood would have been too low so we had a skylight installed right above the stove. This is nowhere as efficient as a hood but does the trick to get the worst out of the kitchen except that the smell of things pan-fried of roasted in the oven will linger for hours, often overnight...

Our solution has been to use the BBQ on our terrace next to the kitchen! We pan-fry or roast absolutely everything on the barbie and have done for the past 10 years or so. No smells inside!

Sorry Shacklife, can't help and hope you can find a solution!

Cheers
Yvan