First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic.
Venting a microwave into the attic.
International mechanical code imc 2009.
Chapter 5 section 505 1 exception 1.
I would like to use that path to vent a new microwave.
The duct must be the sizes listed above for proper draw of air.
First we do not have all the facts.
Anyway i went into the attic and saw a nice vent line going from over the microwave up to but not out of the roof.
I agree with jonas.
Both smaller and larger vents than recommended decrease venting performance.
She said the vent was in the attic and again she was right.
A rectangular to round transition adapter must be used.
Do not vent into an attic or crawl space.
A microwave oven designed to be mounted over a cooktop is usually equipped with a ventilation system to cope with the cooking odors smoke and moisture that rise from the cooking surface.
No other questions need be asked answered to determine that it is improper to vent the range hood into the attic.
The ventilation system may lead to an exterior vent or it may simply recirculate air back into the kitchen.
The old microwave did not.
Ideally the range hood should be vented to the outside usually through the roof.
This article describes the venting options for built in microwave ovens and microwave oven vent systems typically installed above a stovetop or range.
If round ducting also note the following.
From where i viewed did not see any inside openings on the vent plimbing although i did not climb over to the vent and look on the backside.
It appears when this house was built provision was made for venting out the rear of the microwave into the standard 2 4 wall up the cavity inside the wall then up through duct work in the attic through the roof.
Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood.
If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it.
We discuss the importance of venting to the exterior choice of vent components and materials and we refer to microwave oven manufacturers installation instructions.
It is definitely not a good idea to vent a range hood into the attic.
Microwave oven vent installation suggestions.