EcoRenovator  

Go Back   EcoRenovator > Improvements > Geothermal & Heat Pumps
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 06-17-13, 12:52 AM   #1
mackstann
Lurking Renovator
 
Join Date: Jun 2013
Location: Portland, OR
Posts: 21
Thanks: 0
Thanked 3 Times in 3 Posts
Default Heat pump water heater + bathroom exhaust fan

I've been reading Xringer's thread about his Airtap and am thinking about getting the similar Nyle Geyser HPWH with a Marathon tank. I figure this combo could easily last decades. Our tank is brand new though (just bought the house, seller put it in) so the Marathon could come later.

I've been thinking about ducting options and I had an idea I haven't seen mentioned anywhere. Our biggest use of hot water is showers. During a shower, we run the exhaust fan to blow warm moist air from the bathroom to the outdoors, and unconditioned make-up air is drawn from outside the house as a side effect. Well, how about we combine the bath exhaust with the HPWH? When we start our shower and the water heater tank starts cooling down, the heat pump will kick on. It could suck the warm moist air from the bathroom, dehumidify it, and the cool dry air could be dumped ... somewhere. Not sure of the best exhaust solution yet. Dumping back to the bathroom would help dry it out, but the cold air would feel unpleasant. Exhausting to the basement (where the water heater is) would be easiest, but there is no dedicated path for return air, so the geyser would be fighting static pressure and contributing to air pressure imbalance, wasting energy.

Maybe it could exhaust to behind the fridge. Then we'd be killing three birds with one stone. There isn't a good air return path between bathroom and kitchen, but under-cutting the bathroom door or adding a jumper duct could solve that.

mackstann is offline   Reply With Quote
Old 06-17-13, 01:05 AM   #2
mackstann
Lurking Renovator
 
Join Date: Jun 2013
Location: Portland, OR
Posts: 21
Thanks: 0
Thanked 3 Times in 3 Posts
Default

Hmm, looks like this has been done before. I can't post a working link yet but see here: oikos.com/esb/41/eahpstudy.html
mackstann is offline   Reply With Quote
Old 01-16-14, 09:10 AM   #3
lt190b
Lurking Renovator
 
Join Date: Mar 2010
Posts: 24
Thanks: 0
Thanked 2 Times in 2 Posts
Default

mackstann. Have you gone further with the Nyle Geyser hpwh? How did you run the vents? Where did you purchase the Geyser? lt190b
lt190b is offline   Reply With Quote
Old 01-16-14, 12:23 PM   #4
mackstann
Lurking Renovator
 
Join Date: Jun 2013
Location: Portland, OR
Posts: 21
Thanks: 0
Thanked 3 Times in 3 Posts
Default

I was lured by the simplicity and freeness of the GE GeoSpring HPWH. Oregon offers a $600 tax credit, which combined with the federal tax credit and a 10% off Lowe's coupon, made it free.
mackstann is offline   Reply With Quote
Old 01-16-14, 08:44 PM   #5
MN Renovator
Less usage=Cheaper bills
 
MN Renovator's Avatar
 
Join Date: Nov 2010
Location: Minneapolis, MN
Posts: 939
Thanks: 41
Thanked 116 Times in 90 Posts
Default

I don't envy the guy who would ever need to service or replace the plumbing nearby that water heater or the water heater itself. ...contrary to popular belief, plumbers don't usually appreciate the sewage smells.

MN Renovator is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 05:49 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design