EcoRenovator  

Go Back   EcoRenovator > Improvements > Product Reviews
Advanced Search
 


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


Reply
 
Thread Tools Display Modes
Old 09-09-13, 01:30 PM   #11
blahname
Lurking Renovator
 
Join Date: Sep 2010
Posts: 10
Thanks: 0
Thanked 1 Time in 1 Post
Default

Fair enough. Well done for your domestic hot water then sir. Looks like technology is finally catching up to what the people want!

blahname is offline   Reply With Quote
Old 09-09-13, 09:11 PM   #12
NiHaoMike
Supreme EcoRenovator
 
NiHaoMike's Avatar
 
Join Date: Oct 2008
Location: Austin, TX
Posts: 1,127
Thanks: 15
Thanked 247 Times in 233 Posts
Default

Quote:
Originally Posted by blahname View Post
Do you mind me asking a dumb question about that water heater - the heat pump is directly on top of the tank?

Wonder if it might be possible to separate the two without too much piping hassle, or if I would need to maybe circulate outside air past the unit.

I've been looking for ways to heat hot water to circulate under my floors, but haven't found anything fantastic so I'm still hauling wood every year to the woodstove.
The condenser is probably going to be copper tubing bonded to the outside of the inner tank, which you cannot easily remove. You might as well just modify a window A/C.
__________________
To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...
NiHaoMike is offline   Reply With Quote
Old 09-09-13, 10:11 PM   #13
blahname
Lurking Renovator
 
Join Date: Sep 2010
Posts: 10
Thanks: 0
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by NiHaoMike View Post
The condenser is probably going to be copper tubing bonded to the outside of the inner tank, which you cannot easily remove. You might as well just modify a window A/C.
I would agree with you, and would like to do something like that myself, but only if it's a 220/240V A/C. 120V units are easy enough to find, but have their efficiency issues.

Know of any cheap higher voltage A/C units?
blahname is offline   Reply With Quote
Old 09-10-13, 01:20 AM   #14
NiHaoMike
Supreme EcoRenovator
 
NiHaoMike's Avatar
 
Join Date: Oct 2008
Location: Austin, TX
Posts: 1,127
Thanks: 15
Thanked 247 Times in 233 Posts
Default

Maybe modify a used central A/C?
__________________
To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...
NiHaoMike is offline   Reply With Quote
Old 09-19-13, 10:28 AM   #15
hikerjohnson
Submarine Renovator
 
Join Date: Jul 2013
Location: Southern Maine
Posts: 35
Thanks: 4
Thanked 5 Times in 5 Posts
Default

Because I said I would, see below for the electrical usage of most of my household appliances. Note that a lot of them are not constant, but rather cycle on and off, so I am not accurately capturing long-term usage.



In other news, I did in fact install an electric meter on the water heater, I'll post up the energy consumption end of this month, when I have a full month's data to talk about.
hikerjohnson is offline   Reply With Quote
Old 09-20-13, 12:47 PM   #16
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,471
Thanks: 1,110
Thanked 367 Times in 298 Posts
Default

What were you using for hot water before the heat pump water heater was installed?
__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
Old 09-23-13, 10:20 AM   #17
hikerjohnson
Submarine Renovator
 
Join Date: Jul 2013
Location: Southern Maine
Posts: 35
Thanks: 4
Thanked 5 Times in 5 Posts
Default

I had an electric heater, which was perfectly good, but I couldn't resist the price subsidies on the new one coupled with the promise of lower electric bills.

I do not have any meaningful data about what exactly my hot water bill was prior to installing the new pump, as I did not have the heater sub-metered until this month. There is an all-electric setting on the water heater, but I am loath to engage it, and spend more money, just to answer an academic question. I might do it someday anyways.
hikerjohnson is offline   Reply With Quote
The Following User Says Thank You to hikerjohnson For This Useful Post:
Daox (09-23-13)
Old 10-02-13, 11:10 AM   #18
hikerjohnson
Submarine Renovator
 
Join Date: Jul 2013
Location: Southern Maine
Posts: 35
Thanks: 4
Thanked 5 Times in 5 Posts
Default

One month update!

As of this morning, 32 days since I installed the meter, the water heater has used 91kWh of electricity, for an operating cost of approximately $0.42 per day, and roughly one shower per day. Not too shabby, eh?

I have no idea what the straight resistance heating cost would be, and I don't intend to find out.

Where I lived previously, I had worked out that a shower on my instant propane heater cost me about a dollar, though in its defense, it had a 50 foot uninsulated copper run between the heater and the showerhead.
hikerjohnson is offline   Reply With Quote
Old 10-02-13, 11:33 AM   #19
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,471
Thanks: 1,110
Thanked 367 Times in 298 Posts
Default

Honestly, that seems a little high to me. But you probably have more people in your house than I do. My hot water heater is an on demand electric unit. It draws 9.6 kW when on. Therefore, my ~10 minute shower uses ~1.6 kWh. Hot water use is next to nothing besides my shower. So, your 2.8 kWh/day seems a bit high to me. I do have a pretty low flow shower head though, a Niagara Conservation Earth 1.25 gpm (which I love). I suppose with a 2.5 gpm head that would make more sense.
__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
Old 10-02-13, 02:00 PM   #20
hikerjohnson
Submarine Renovator
 
Join Date: Jul 2013
Location: Southern Maine
Posts: 35
Thanks: 4
Thanked 5 Times in 5 Posts
Default

I may have been inaccurate just calling out the one shower; we are a 2-person household, and one of us takes significantly longer showers than the other; we also use a dishwasher on about 2 days out of three. We do have a 1.5 GPM showerhead, which is surprisingly nice.

hikerjohnson 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 01:25 AM.


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