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Old 02-10-2019, 04:11 PM   #1
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Kitchen ceiling vent pipe - need diffuser help


We bought this house with the pipe open (see pics). The inspector said to buy a fan to cover the gaping hole. The problem is we can't find a fan or diffuser that fits the 7" hole that is a pipe that goes to the roof.




We've lived with it for 5 years and now are going to sell the house. Can someone please recommend where to look to find a fan/diffuser to make the hole more pleasant to look at?
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Old 02-10-2019, 04:45 PM   #2
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Re: Kitchen ceiling vent pipe - need diffuser help


1. Remove the collar
2. Cut the exhaust pipe back as needed
3. Repair ceiling to needed size for standard big-box exhaust fan
4. Install fan
5. Make connection from fan to cut back exhaust pipe
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Old 02-10-2019, 05:25 PM   #3
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Re: Kitchen ceiling vent pipe - need diffuser help


Inline fans may fit but it looks more like a duct was supposed to go through the 12" cabinet below? Is the microwave ducted or not? Maybe it was supposed to exhaust through the hole?

One answer may be abandon it.
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Old 02-10-2019, 05:41 PM   #4
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Re: Kitchen ceiling vent pipe - need diffuser help


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Originally Posted by carpdad View Post
Inline fans may fit but it looks more like a duct was supposed to go through the 12" cabinet below? Is the microwave ducted or not? Maybe it was supposed to exhaust through the hole?

One answer may be abandon it.
No ! Don't abandon it - it's great to have an exhaust duct go up and out the roof already - if anything leave it as is so the next homeowner can add the fan
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Old 02-10-2019, 05:49 PM   #5
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Re: Kitchen ceiling vent pipe - need diffuser help


https://www.amazon.ca/AIRTEC-MV360-R.../dp/B0076P0LTM
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Old 02-11-2019, 11:00 AM   #6
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Re: Kitchen ceiling vent pipe - need diffuser help


Is there power/switch to the location? If not remove the trim and patch it.
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Old 02-12-2019, 02:38 PM   #7
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Re: Kitchen ceiling vent pipe - need diffuser help


Surprised no one has mentioned the microwave yet. If the nuke box is the type with configurable venting, you should configure it to vent vertically, then run a pipe from the nuke box through the cabinet above, to the vent hole in the ceiling. You can cover this with a wooden box to match the cabinetry if you like.
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Old 02-12-2019, 03:02 PM   #8
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Re: Kitchen ceiling vent pipe - need diffuser help


Dont understand why you lived with that for 5 years. Think how much $ you wasted in losing heating / cooling.

Anyway. That vent was there to be connected to a vented range hood fan. Benefits are they remove odors and moisture from cooking.
They would have had to run a duct thru the cabinet. To hook up to the range microwave or a standard exhaust fan. And then since cabinets dont go to ceiling. You would build a box around it.

But some homes go the cheap route and dont install a vent. And use vent-less range hood or microwave.

In your case I would finish the job and do it correctly.

Second choice is remmove the plastic shield and buy a acess panel they come in different sizes.
https://www.amazon.com/dp/B000BO7512...=AU42EUN9JSHSR

Before you cover the hole stick some insulation in the pipe for energy savings.

Paint cover to match ceiling. Now the new owners always have the options. Continue with a ventless fan. Or will already have the hard part done if they want to install a vented one. Just remove the panel and finish the job.
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Old 02-13-2019, 11:46 AM   #9
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Re: Kitchen ceiling vent pipe - need diffuser help


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Originally Posted by Nealtw View Post
Thanks, I looked into this and the specs wouldn't work with the hole.

Quote:
Originally Posted by RRH View Post
Dont understand why you lived with that for 5 years. Think how much $ you wasted in losing heating / cooling.
We don't have a/c and our heat is a wall furnace and rarely used - we're in SD.

Quote:
Originally Posted by RRH View Post
Anyway. That vent was there to be connected to a vented range hood fan. Benefits are they remove odors and moisture from cooking.
They would have had to run a duct thru the cabinet. To hook up to the range microwave or a standard exhaust fan. And then since cabinets dont go to ceiling. You would build a box around it.

But some homes go the cheap route and dont install a vent. And use vent-less range hood or microwave.

In your case I would finish the job and do it correctly.

Second choice is remmove the plastic shield and buy a acess panel they come in different sizes.
https://www.amazon.com/dp/B000BO7512...=AU42EUN9JSHSR

Before you cover the hole stick some insulation in the pipe for energy savings.

Paint cover to match ceiling. Now the new owners always have the options. Continue with a ventless fan. Or will already have the hard part done if they want to install a vented one. Just remove the panel and finish the job.
Thanks for your reply and totally agree that the best course of action would have been to install the pipe/box, but our plan was to remove the wall and reconfigure the kitchen so we left it as it was until we tackled it (see my intro to see all the projects we did in 5 years). Now that we're moving I like the second option as it gives the new owner flexibility to change it how they'd like.
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Old 02-13-2019, 11:55 AM   #10
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Re: Kitchen ceiling vent pipe - need diffuser help


Some one might want to vent that micro but it should be closer to the wall I think I would just leave the duct in the attic and patch the hole in the ceiling.
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Old 02-13-2019, 04:15 PM   #11
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Re: Kitchen ceiling vent pipe - need diffuser help


Quote:
Originally Posted by LauraInCA View Post
We bought this house with the pipe open (see pics). The inspector said to buy a fan to cover the gaping hole. The problem is we can't find a fan or diffuser that fits the 7" hole that is a pipe that goes to the roof.




We've lived with it for 5 years and now are going to sell the house. Can someone please recommend where to look to find a fan/diffuser to make the hole more pleasant to look at?
Offhand I cannot think of a fan that would fit in there comfortably. Worst case scenario is to take the dimensions to a sheet metal shop and get a custom made diffuser.

Every once in a while I come across a fan that just doesn't conform to anything. It usually turns out that the fan was made for a recreational vehicle or a mobile home and are never compatible with anything else and replacement parts are not available.
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Old 02-13-2019, 05:57 PM   #12
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Re: Kitchen ceiling vent pipe - need diffuser help


What is in the two small cabinets above the microwave (e.g., vent pipe, storage)? Is there a range (gas or electric?) below the microwave? Is that soot inside that pipe, like in a wood burning stove, or grease, like from an exhaust fan, or is it just dark (but clean) because of the camera angle?

Is there a switch or control for this vent, and where would you get power for the “fan” (don’t know if there is an attic above this area where you could explore)? Does it exit outside the roof or in attic space? What is the approximate age of the house?
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