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Old 12-16-2013, 12:25 PM   #1
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Bypass humidifier questions


Hi,
I am trying to install a drum type bypass humidifier. Two questions :
1. The supply duct has an air conditioning A frame. How do I avoid drilling into it?
2. If I can't figure out how to avoid the A frame air conditioning part, can I install the drum humidifier on the return duct and not connect the flexible tubing to the supply duct? I am pretty sure, it would work, but may not be as efficient. Any suggestions would be highly appreciated.
Thanks.

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Old 12-16-2013, 04:57 PM   #2
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Bypass humidifier questions


Mount the drum part on the return.

Drill hole on the side where the coil slopes a way from the plenum. Put electric tape on the bit so that you only drill in 1/4" deep, then cut the rest out with snipes. I usually just use a hammer and a flat blade screw driver to make my start hole/cut.

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Old 12-16-2013, 05:01 PM   #3
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I use a scratch awl and hammer and make a small hole then ream it out bigger with the awl and poke around once the hole is big enough. then use curved sheet metal snips. or use a 1/8" bit or smaller and only leave 1/4" of it sticking out the drill chuck and be careful.
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Old 12-16-2013, 05:14 PM   #4
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yep either way as yuri and been suggest..we have done it both ways also. ben sr
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Old 12-16-2013, 05:22 PM   #5
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where the water drains from the coil is the front of it and the A/coils follow that like a straight road. you want to get to the side of the coil 90 degrees in either direction from the front and don't drill at the level of the drain or you could still hit a Freon line.
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Old 12-16-2013, 07:43 PM   #6
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Thank you all for the suggestions. They are a great help.
Question to Yuri :
The airconditioning A frame is installed behind a rectangular plate on the supply plenum. The drain is located at the bottom right corner of the rectangular plate. Other A frame connectors are on the top right corner of the rectangular plate. The return air plenum is on the left side of the supply plenum. Can I drill on the left middle of this rectangular plate. (very gently as suggested ). Thank you so much.
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Old 12-16-2013, 10:19 PM   #7
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post some pics of all sides of the plenum and where the drain and lines attach and I can draw an arrow with MS Paint 4 U.

click on Go Advanced>Manage attachments
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Old 12-17-2013, 08:54 AM   #8
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A drum humidifier? Seriously? Those are a maintenance nightmare and a breeding ground for all sorts of alge and mold. Have a look at Aprilaire 600 or equivalent. The flow-through design is very effective, requires almost zero maintenance and cleaning, and is much more sanitary.
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Old 12-19-2013, 07:14 PM   #9
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Thanks to Yuri for offering to point out the location for drilling to avoid damaging the airconditioning A frame. Here's the picture. Thanks again.
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Old 12-19-2013, 09:33 PM   #10
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very carefully drill a test hole in the middle of the red circle and enlarge it bit by bit with a nail and then round shafted screwdriver until you can get a finger in there and feel around. it should be above the coil. you can buy sheet metal at HDepot to patch any holes.
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Old 12-19-2013, 09:37 PM   #11
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Or drill a hole in the blue circle and look inside to see where the coil is and patch the hole. Drum humidifiers are cheap and flimsy with weak motors these days and not recommended. Honeywell makes good bypass flo thru units and HDepot has them. HE240A. Need a floor drain for the overflow.



http://www.homedepot.com/b/Heating-V...house?Ntx=mode
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Old 12-19-2013, 09:44 PM   #12
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Thanks Yuri for the suggestions. Is there any reason I can't drill in the plenum going at an angle just above the red circle you have drawn? I have a friend who has done that and has not reported any problems. Thanks.
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Old 12-19-2013, 09:48 PM   #13
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You can go in the purple circle also. May need more pipe to get there and it can sag. Shortest route is the best. Reread my above post as I recommend a flo thru rather than a drum. When I do high quality jobs as I like too I get 1 or 2 6" galvanized elbows from HDepot and add them to make the pipe longer and have no bends or kinks as that plastic pipe they give you can be short and kink. Best way is to get metal flexible pipe as the plastic stuff dries out eventually. HDepot is good for that kind of stuff. Depending on what model you buy they may give you some thin tin foil type pipe or the cheap plastic stuff.
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Old 12-20-2013, 04:30 AM   #14
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I don't attach them to a supply trunk, as it tends to reduce air flow too much.

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