Heat exchanger on cloths dryer

General Outdoor Boiler Discussion
Post Reply
Ky mustang
Posts: 4
Joined: Thu Mar 16, 2017 8:35 pm
OWB brand: Home built
OWB Model: 1 of 1

Heat exchanger on cloths dryer

Post by Ky mustang » Fri Mar 31, 2017 8:42 pm

Has anyone here tried ducting a heat exchanger on their cloths dryer . I think the plumbing would be pretty simple just a normally closed valve that opens with power to the dryer and a water to air heat ex with air duct going to intake air on dryer. My dryer is supposed to run at 280 so it would just assist/prewarm intake air to 130 or so but it would have to take a sizable amount of kwh usage off the electric bill.

Posts: 308
Joined: Mon Jun 23, 2014 8:51 am
OWB brand: HeatMaster
OWB Model: G200
Location: South central Wisconsin

Re: Heat exchanger on cloths dryer

Post by RSI » Fri Mar 31, 2017 9:19 pm

I got a gas dryer that I pulled the gas burner out of and attached a 12x12 2 row heat exchanger to. I just ran 1/2" pex to it and put a solenoid valve on it and connected it to the leads that powered the gas burner.

I redid the piping in the house to get better flow so I could use a smaller pump. Because the head pressure was lower it didn't get enough flow through the 1/2" pex anymore. I currently have it disconnected. Maybe I will get around to redoing it for next winter. I will probably try a 3 row 12x6 heat exchanger. I think that the air was just going through part of the 12x12 and not getting as hot but I could be wrong.

With the setup I had, it didn't work too bad but did take longer than the electric dryer. I was thinking about piping in outside air to feed it. That would be much less humid and should make it dry much faster.

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest