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Discussion Starter #1 (Edited)
Hi,

I've got a tricky problem, atleast tricky for DIY guy.

We have a GE Profile range, and it has a cook top and microwave with hood, vented to outside wall.

We cook a lot of oily, greasy stuff, so I figured I will get a dedicated range hood as the one in my microwave wasn't that effective.

So I bought a Franke EuroPro 30" hood. Here is the spec and installation pdf link.

http://www.frankeksd.com/specviewer.php?prodid=385
http://www.frankeksd.com/grfx/pdf_files/installs/EuroProINS.pdf

I removed my microwave, and the cabinet above it. First off I noticed that, Franke hood has the vent hole on top, while the microwave had the vent on the back side. To make it worse, the Franke vent hole is circular (6" dia) while the microwave is rectangular (oval) shaped.

Another issue is, the cabinet was mounted right on the rectangular vent, so if I install the new hood undearneath the cabinet, I wouldnt be able to use the round to rectangle transition.

So, should I remove the drywall, take the existing rectangular vent, add a circular vent tube, increase its height, put vent holes in my cabinet and then connect the hood to it?

What is the best way to attach the Franke hood to the existing vent? Can I use flexible metal duct from Franke to the existing vent or should I replace the existing square vent to a circular one??

I did read that flex piping is a big no no for kitchen and greasy situations, but this will be for about a foot, so can I get away with it?

Ive got some pictures in the following links, it would be great if any of you can give me a suggestion.

http://img22.imageshack.us/img22/2041/dsc5395.jpg
http://img26.imageshack.us/img26/5521/dsc5399x.jpg
http://img149.imageshack.us/img149/6554/dsc5401.jpg
http://img200.imageshack.us/img200/3827/dsc5402.jpg
http://img91.imageshack.us/img91/1191/planz.jpg

Thanks in advance
 

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kev... good job sending pictures along with your post. Makes things much easier. I think the installation instructions are your best guide here. Extend your oval duct work up and into the wall cabinet. You then use a 6" round to oval adapter and a couple elbows to make your connection.
Only problem I see is wether or not you can get oval duct and/ or an oval adapter. Theres a chance you may have to replace with rectangular. Or perhaps you can have the parts made by an HVAC company.
 

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Discussion Starter #3 (Edited)
Hi,

Thanks for the reply. Ive got some more questions, coz this is all new to me, just dont want to mess up when the kitchen general is out of town :)

When you say I'll have to extend the oval duct work up in the cabinet, you mean the one that's already installed in the wall??

If I have to extend, then I presume that I will have to cut the dry wall, remove the vent head, put an extension tube and then the vent head.

If thats the case, then I will want to use just the transition and end the transition in the wall, coz If I add another elbow, that adds about another 8" width wise and I'm not sure if my wall has enough space for the elbow.

I also bought some sheet metal (pic 3)thinking I can make ducts on my own by bending it and using foil tape to hold it in place, is it advisable?

Check the attached pictures...

In Pic 2, you see that the current vent enclosure is useless, since the new hood has the vent on top.
 

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kev... Yes, you have to remove some drywall. And the vent head you will no longer need. It will be assembled just like you have it in your first picture. And it appears like you need a short piece of oval duct to bring your transition up in the wall. Finally, no, I wouldnt make my own duct. Its designed to lock together and then foil tape. Make sure you tape joints as well. You dont want all that grease coming out inside your wall, could also be a fire hazard. One more thing, watch the wires.
 

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Discussion Starter #5
12penny,

Thanks for the suggestions. I see I have 2 studs in there, so will be extra careful as I have a junction box right above the head. I'm also going to use a manual dry wall saw. I know Loews and HD had some oval cut-your-own-length ducts, I will get it from them. So far, everything looks good.
 
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