Kitchen Instant hot water dispenser - Page 2

AC_Hacker · 12-26-11, 11:01 AM

Small, simple...

Put in your water,
Water heats to boiling,
Power goes off
Holds 18 oz max.

Pretty much what Piwoslaw was describing...

-AC_Hacker

Ryland · 12-26-11, 05:11 PM

Amazon.com: Hamilton Beach 40898 Cool-Touch Cordless 8 Cup Electric Kettle: Kitchen & Dining

Is what I use to boil water, it takes 50 watt hours to boil 4 cups of water and with it's toaster like switch it turns off as soon as it's boiling, I really like it because the whole inside is stainless steel instead of having your water boiling inside of plastic or aluminum.
What is most likely happening with your current hot water device is lime scale build up, if you can boil vinegar in it, that will do wonders to clean out the scale, then it would be worth putting a kill-a-watt meter on it and find out how much energy it really does use.

menaus2 · 01-08-12, 12:24 PM

I've been thinking about using a solar pre-heater system as an instant hot water heater. Even a small 5 gallon tank under the sink with a small drain back panel could really compliment an electric tankless heater and eliminate the "cold slug" since the water in the heat exchanger is ready to go. It could be expanded to showers or any DHW application. IDK what the effect would be on performance if there wasnt sun for a couple days tho... :/

MN Renovator · 01-08-12, 12:40 PM

I put more thought into the tankless water heater 'slug of cold water, then warm that gets cold, then finally hot' water issue. I'm thinking that those water circulation systems that are designed to save water by cycling it around so the water doesn't get cold might be the answer. Just don't use them constantly, if they were connected to a flow switch or simply a manual button to activate the system for 30 seconds or so would more than do the trick. If the piping was PEX or probably anything non-metal the losses of heat wouldn't be so bad and the issue of using dumping additional heated water would be reduced. It would require either some additional plumbing to add the return or to go PEX with it if this wasn't part of a new house design.

12-26-11, 11:01 AM	#11
AC_Hacker Supreme EcoRenovator Join Date: Mar 2009 Location: Portland, OR Posts: 4,004 Thanks: 303 Thanked 723 Times in 534 Posts	Here's what I'm using: Small, simple... Put in your water, Water heats to boiling, Power goes off Holds 18 oz max. Pretty much what Piwoslaw was describing... -AC_Hacker __________________ I'm not an HVAC technician. In fact, I'm barely even a hacker...

12-26-11, 05:11 PM	#12
Ryland Master EcoRenovator Join Date: Mar 2009 Location: Western Wisconsin. Posts: 913 Thanks: 127 Thanked 82 Times in 71 Posts	Amazon.com: Hamilton Beach 40898 Cool-Touch Cordless 8 Cup Electric Kettle: Kitchen & Dining Is what I use to boil water, it takes 50 watt hours to boil 4 cups of water and with it's toaster like switch it turns off as soon as it's boiling, I really like it because the whole inside is stainless steel instead of having your water boiling inside of plastic or aluminum. What is most likely happening with your current hot water device is lime scale build up, if you can boil vinegar in it, that will do wonders to clean out the scale, then it would be worth putting a kill-a-watt meter on it and find out how much energy it really does use. Last edited by Ryland; 12-26-11 at 05:14 PM..

01-08-12, 12:24 PM	#13
menaus2 Apprentice EcoRenovator Join Date: Feb 2011 Location: Driftless Region, North America, Earth, Solar System, Orion Arm, Milky Way Galaxy,Virgo Supercluster Posts: 116 Thanks: 13 Thanked 35 Times in 25 Posts	I've been thinking about using a solar pre-heater system as an instant hot water heater. Even a small 5 gallon tank under the sink with a small drain back panel could really compliment an electric tankless heater and eliminate the "cold slug" since the water in the heat exchanger is ready to go. It could be expanded to showers or any DHW application. IDK what the effect would be on performance if there wasnt sun for a couple days tho... :/

01-08-12, 12:40 PM	#14
MN Renovator Less usage=Cheaper bills Join Date: Nov 2010 Location: Minneapolis, MN Posts: 939 Thanks: 41 Thanked 116 Times in 90 Posts	I put more thought into the tankless water heater 'slug of cold water, then warm that gets cold, then finally hot' water issue. I'm thinking that those water circulation systems that are designed to save water by cycling it around so the water doesn't get cold might be the answer. Just don't use them constantly, if they were connected to a flow switch or simply a manual button to activate the system for 30 seconds or so would more than do the trick. If the piping was PEX or probably anything non-metal the losses of heat wouldn't be so bad and the issue of using dumping additional heated water would be reduced. It would require either some additional plumbing to add the return or to go PEX with it if this wasn't part of a new house design.