My kitchen fitter has discovered a problem while measuring up to fit our chimney extractor hood, being fitted into a single storey extension. In order for the hood to be at the minimum height above the oven, the hole for the ducting is going to be too high to clear the soffits on the outside. He wants to cut a 120mm hole, and even at the lowest he can get away with, the centre hole will (he estimates) be at the same height as the soffit.
Could he cut the hole at an angle, so that the exterior hole is (at least) 60mm lower than the interior hole? I would guess he was going to use a core drill - can that cut at an incline or must it go through horizontally? The wall is (as far as I can tell) a standard cavity wall with blocks on the inside and red bricks on the outside.
I guess I also don't know if there are regulations to do with angles of ducting, cutting holes etc. besides the practicality of cutting a big hole at an angle. I've asked him to have a chat with the builder about it - but I wonder if I'm asking him to do an impossible task!
But anything that could be done to avoid going down the recirculation route (their suggested solution) I'd like to investigate... since I would prefer not to risk any condensation / moisture problems. It's an extractor for a 100cm range cooker so I'd imagine it has the potential of causing a world of problems if not externally vented...
Or maybe there's another trick to getting around this problem? I can't be the only one who has discovered soffits that are lower than the internal walls...
Edit: I should add that there's no access to the roof space, so I don't think ducting up through that space is an option.
Could he cut the hole at an angle, so that the exterior hole is (at least) 60mm lower than the interior hole? I would guess he was going to use a core drill - can that cut at an incline or must it go through horizontally? The wall is (as far as I can tell) a standard cavity wall with blocks on the inside and red bricks on the outside.
I guess I also don't know if there are regulations to do with angles of ducting, cutting holes etc. besides the practicality of cutting a big hole at an angle. I've asked him to have a chat with the builder about it - but I wonder if I'm asking him to do an impossible task!
But anything that could be done to avoid going down the recirculation route (their suggested solution) I'd like to investigate... since I would prefer not to risk any condensation / moisture problems. It's an extractor for a 100cm range cooker so I'd imagine it has the potential of causing a world of problems if not externally vented...
Or maybe there's another trick to getting around this problem? I can't be the only one who has discovered soffits that are lower than the internal walls...
Edit: I should add that there's no access to the roof space, so I don't think ducting up through that space is an option.