Hello
Let's say the exhaust duct goes from the ceiling-integrated kitchen fan directly to the attic where there is a cleaning hatch. Is there any problem with that?
My HVAC technician says it's a matter of interpretation whether you should have a cleaning hatch at every bend or not. Are there no requirements?
I have looked at, among others, provinshus, eksjöhus, and where they have placed the kitchen fan and what is above, there is no chance they have a cleaning hatch along the way, except the kitchen fan's hole and the opening in the attic/ceiling.
My question is, do I need a cleaning hatch, or does it work perfectly fine with the kitchen fan’s hole and the cleaning hatch in the attic?
Note: I have an external motor for the kitchen fan in the attic.
Let's say the exhaust duct goes from the ceiling-integrated kitchen fan directly to the attic where there is a cleaning hatch. Is there any problem with that?
My HVAC technician says it's a matter of interpretation whether you should have a cleaning hatch at every bend or not. Are there no requirements?
I have looked at, among others, provinshus, eksjöhus, and where they have placed the kitchen fan and what is above, there is no chance they have a cleaning hatch along the way, except the kitchen fan's hole and the opening in the attic/ceiling.
My question is, do I need a cleaning hatch, or does it work perfectly fine with the kitchen fan’s hole and the cleaning hatch in the attic?
Note: I have an external motor for the kitchen fan in the attic.
The requirement is that the channel must be cleanable along its entire length.
So if you have an air duct that is, say, 5 meters long and there is a 90-degree bend in the middle, the bend does not need to be equipped with a cleaning hatch, provided that the pipe can be easily accessed from its ends.
Even a 90-degree bend located near the end can be easily bypassed with cleaning equipment, although the "reach" past the bend will be reduced.
There is room for interpretation, and therefore it is a common rule of thumb to have a cleaning hatch at every 90-degree bend. If you have that, you haven't gone wrong.
So if you have an air duct that is, say, 5 meters long and there is a 90-degree bend in the middle, the bend does not need to be equipped with a cleaning hatch, provided that the pipe can be easily accessed from its ends.
Even a 90-degree bend located near the end can be easily bypassed with cleaning equipment, although the "reach" past the bend will be reduced.
There is room for interpretation, and therefore it is a common rule of thumb to have a cleaning hatch at every 90-degree bend. If you have that, you haven't gone wrong.
Interpreting as you only have a bend? Then no hatch is needed. However, I think it must be possible to access it on the roof. So prepare so that one can reach and work at it on the roof.
In our house, we have a roof hatch at the chimney. The chimney sweep can access it via the attic. Then there are roof steps down to the exhaust of the exhaust duct.
In our house, we have a roof hatch at the chimney. The chimney sweep can access it via the attic. Then there are roof steps down to the exhaust of the exhaust duct.