ᐅ Exhaust hood vented using only 100 mm (4-inch) PVC ducting.
Created on: 6 Jan 2014 10:49
O
ObsthaendlerO
Obsthaendler6 Jan 2014 10:49Hello,
I was quite shocked to realize that current exhaust hoods for venting require a diameter of 125mm to 150mm (5 to 6 inches). However, in October, roof outlets were installed with 100mm (4 inches) zinc vent pipes—one for the kitchen and one for a new bathroom.
As I now see, this is a serious problem. The size is sufficient for the bathroom but unfortunately not for the kitchen. Additionally, the roofer recommended installing an S-trap to prevent condensate from leaking. The pipe runs through a flat (cold) roof.
Unfortunately, the work has progressed quite far since October, and the ceiling is already closed. However, that should not stop me from reopening the ceiling.
The question is, who will cover the cost of the necessary work? The quote mentioned "installation of new vent pipes." The roofer should have known what the standard sizes are for kitchen and bathroom. I didn’t... until now.
PS: Or would it be adequate to run a 150mm (6 inches) sewer pipe plus a condensate trap from the exhaust hood to the 100mm (4 inches) vent pipe? Although this creates a narrowing just before the outlet, it is still a reduction!
Regards,
Obsthaendler
I was quite shocked to realize that current exhaust hoods for venting require a diameter of 125mm to 150mm (5 to 6 inches). However, in October, roof outlets were installed with 100mm (4 inches) zinc vent pipes—one for the kitchen and one for a new bathroom.
As I now see, this is a serious problem. The size is sufficient for the bathroom but unfortunately not for the kitchen. Additionally, the roofer recommended installing an S-trap to prevent condensate from leaking. The pipe runs through a flat (cold) roof.
Unfortunately, the work has progressed quite far since October, and the ceiling is already closed. However, that should not stop me from reopening the ceiling.
The question is, who will cover the cost of the necessary work? The quote mentioned "installation of new vent pipes." The roofer should have known what the standard sizes are for kitchen and bathroom. I didn’t... until now.
PS: Or would it be adequate to run a 150mm (6 inches) sewer pipe plus a condensate trap from the exhaust hood to the 100mm (4 inches) vent pipe? Although this creates a narrowing just before the outlet, it is still a reduction!
Regards,
Obsthaendler
O
Obsthaendler6 Jan 2014 12:42I have meanwhile spoken with two independent roofing companies. Both said they would install a 100mm (4 inch) zinc vent pipe, and mentioned that sometimes 125mm (5 inch) or 150mm (6 inch) pipes are used, but very rarely. What is the correct size?
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