Point Of Use Electric Tankless Hot Water Heater..used As A Hot Water "booster" - Plumbing - DIY Home Improvement | DIYChatroom
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread
Display Modes
Old 04-09-2014, 09:58 AM   #1
Member
 
Join Date: Mar 2013
Posts: 71
Rewards Points: 111
Default

point of use electric tankless hot water heater..used as a hot water "booster"


I have an older boiler with a tankless coil. It does fine providing hot water for the sinks, dishwasher, even the shower most of the time. Where it often comes up short is providing sufficient flow of DHW to fill the bath for our young children. I usually get a blast of hot water which quickly subsides to luke warm, then I have to kill the water, give the boiler time to heat up and get more hot water...a pretty big inconvenience when you're trying to put two kids to bed, and not always reliable. I've also had to turn up the temp on my aquastat to higher than necessary to keep up.

I had originally thought of getting a 40gal electric tank and putting it in series with my coil essentially as storage tank. My only concern with this is the cost to operate an electric tank.

So now Im thinking of getting a small (6-8kw) electric tankless heater and feeding it with the DHW line that feeds the only full bath in the house. There's no way a heater that size could keep up with the HW demand to fill the tub using a cold water supply, but since the DHW never really drops below 80F or so, I think it could work to "boost" the HW I get to my full bath. This would also use an incredibly small amount of energy as it would only run for 20-30 minutes/day.

The only thing is I cant seem to find any information on this type of setup, so I have some concerns.

-Will it be a problem for the unit if fully heated (110-120F) water goes through the heater?
-Most seem to have anti-scald/thermostatic protection built in, but I imagine they rely on the cold water supply to mix, could this be a problem? If so, could it be solved by adding a separate anti-scald valve after the heater?
JustinNY is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-09-2014, 05:34 PM   #2
Member
 
Join Date: Mar 2013
Location: Ohio
Posts: 5,701
Rewards Points: 1,948
Default


When was the last time you had it cleaned and descaled?
Ghostmaker is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tankless water heater to pre-heat incoming water matthet Plumbing 35 01-06-2017 12:39 AM
water heater drip kdange1 Plumbing 6 10-29-2014 05:26 PM
Drill hole in conentric vent for tankless water heater? toddmanqa HVAC 7 01-09-2014 11:49 AM
Tankless water heater tgillis Plumbing 3 09-18-2011 03:10 PM




Top of Page | View New Posts