Originally Posted by Papa (Post 864566)

We are looking for someone to install a kitchen fan vent to the outside. We have a Begonia, with an "inside" kitchen, (not on outside wall). Unfortunately many Begonia models have just a Microwave recirculating vent. We would like to have it vented to the outside. We will even be willing to remove the Microwave if necessary. Any help would be greatly appreciated. If anyone has a Begonia with an outside vent, we would also be interested in hearing from them.

Originally Posted by skip0358 (Post 864575)

If you go up in the attic you will see an exhaust tube leaving your microwave going thru the roof. Make sure you use the boost button on the microwave and clean the filters on the underside of the microwave.

Originally Posted by Thefireguy (Post 864613)

Microwaves are generally not vented
Im not familiar with the layout of your kitchen but the important issues on this type addition include...
1) Make sure the fan for your vent is rated to overcome the friction losses in the duct length
2) Grease laden exhaust fumes must be sealed at all joints in the duct to prevent grease deposits from dripping into the attic
3) If the duct is terminated above the roof some grease stains may be visible on light roof shingles
4) Never allow anyone to install an open discharge into the attic due to the obvious fire consequences
This is work for an accomplished HVAC guy unless you are really good at understanding building and fire codes.

Originally Posted by Thefireguy (Post 864613)

Microwaves are generally not vented
Im not familiar with the layout of your kitchen but the important issues on this type addition include...
1) Make sure the fan for your vent is rated to overcome the friction losses in the duct length
2) Grease laden exhaust fumes must be sealed at all joints in the duct to prevent grease deposits from dripping into the attic
3) If the duct is terminated above the roof some grease stains may be visible on light roof shingles
4) Never allow anyone to install an open discharge into the attic due to the obvious fire consequences
This is work for an accomplished HVAC guy unless you are really good at understanding building and fire codes.