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PostPosted: Wed Sep 14, 2016 3:39 pm 
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Obsessed
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Joined: Thu Dec 02, 2004 12:14 am
Posts: 1629
Location: Canton, MI
I found a couple of yellow jackets in the house over the last few days and today I discovered their nest. They've taken up residency in the make-up air vent that feeds directly into the cold air return of the furnace, meaning they have access to the entire house. Making it harder, anything I spray in there will be distributed throughout the house when the furnace fan is on. Suggestions?


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PostPosted: Wed Sep 14, 2016 4:34 pm 
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Obsessed

Joined: Wed Jan 04, 2006 8:12 pm
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Location: Ypsilanti
Does this air intake really go into the air of the house? That seems unusual. Or is it the (usually PVC pipe on modern systems) combustion air intake for the furnace, which does not actually go into the house air???


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PostPosted: Wed Sep 14, 2016 4:34 pm 
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Elite

Joined: Tue Oct 27, 2009 9:14 am
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Duct cleaning service? Giant vacuum cleaner.


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PostPosted: Wed Sep 14, 2016 9:02 pm 
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Obsessed
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Joined: Thu Dec 02, 2004 12:14 am
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Location: Canton, MI
Dial-up Dave wrote:
Does this air intake really go into the air of the house? That seems unusual. Or is it the (usually PVC pipe on modern systems) combustion air intake for the furnace, which does not actually go into the house air???


This one feeds directly into the cold air return. There is a section of it that is hose so I might be able to clamp it off while taking care of the yellow jackets.


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PostPosted: Wed Sep 14, 2016 9:53 pm 
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Obsessed

Joined: Thu Aug 19, 2004 3:53 pm
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Location: Monroe
Mine has a damper with a weight and opens as needed to suck in outside air. It would be easy to tape the weight to keep the damper closed. Any chance yours is like that?


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PostPosted: Thu Sep 15, 2016 9:05 am 
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Elite

Joined: Tue Dec 06, 2011 5:04 pm
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Location: Ann Arbor
We had a yellow jacket nest under the front of the house and as we resided discovered it was about 18" around and in the wall! After some research I found that they only live one year and they abandon the nest. The queen survives to start another nest so you might just be patient and they'll die and then maybe you can find a way of killing the queen. Obviously in the meantime figuring out how the got in.

Jay


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PostPosted: Thu Sep 15, 2016 9:33 am 
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Elite

Joined: Sun Feb 05, 2012 10:04 am
Posts: 303
Location: Farmington Hills, MI
The makeup air duct is there to keep the house from being at lower pressure than outside (due to air consumption of clothes dryer, vent fans, etc.) which increases infiltration...this is important in the heating season, probably less so in the late summer and early fall. I would disconnect the duct (probably 6" flexduct) from the cold air return and plug that end to keep the buggers out of the house. Then as noted above I would wait out the death of the hive and departure of the queen. Then reconnect the duct, oh and check the inlet as it should have screen to avoid these problems.

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Kevin (Specialist in reconstituting the wood after a wayward toolpath)


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