Hot water pre heater

[kc7jty]

Anyone have experience with one of these type water heaters:
http://www.faucetdirect.com/bosch-gl2-5-ariston-point-of-use-electric-water-heater-2-5-gallon/p308112

The reviews are mixed. I have to wait 60 seconds to get hot water at my kitchen sink.
If I get one I'll have to rewire the garbage disposer and add a switch on the front wood panel between the sink and the under the sink doors.

In the winter here the hot water is so cold for one minute it makes the marrow in your bones ache.

(the small 2.5 gallon is the only one that will fit under my sink, this site's reviews praise it. I found some reviews last night that were quite bitchy about the problems some supposedly encountered.)

[KG4CGC]

Do you use gas or electric?

[KG4CGC]

Solar preheater. http://www.dulley.com/docs/f695.htm

If you have gas, that is the way to go. Tankless water heaters can be used to preheat your water.

[NA4BH]

I've heard the gas ones are pretty good.

[kc7jty]

No gas here, 'cept the op.

This is NOT a tankless heater, the tankless electric 110v models only produce .5 gpm. My aerator faucet produces 1.5 gpm.

[KG4CGC]

No gas here, 'cept the op.

This is NOT a tankless heater, the tankless electric 110v models only produce .5 gpm. My aerator faucet produces 1.5 gpm.

You could run 2 water heaters. Set the first one to 100 to 110 degrees and the second one to regular temp wherever you might keep that. Better than having 40 degree water hitting your wh in the winter.
Anyone else heard of this?

[kc7jty]

that's this deal, 2.5 gals of hot water right under the sink. by time the regular hot water gets there 1.5 gals of the 2.5 will be used up.
I fear the hot & cold water separation in the mini tank won't be very efficient though.
scenario:
Room temp water for 2 seconds, hot water for 30 seconds, dropping down to about 85 degrees for the next 30 seconds, rising back to hot over the next 60 seconds.

[kf0rt]

We've had these before:

http://www.homedepot.com/h_d1/N-5yc1...atalogId=10053

This isn't quite the same thing (but same idea). This has a separate faucet and only holds 1/3 gallon. They work very well if you just need a little hot water, but probably not too useful if you need to fill a sink. Great for instant coffee and that sort of thing. Downside is they don't last very long. We've had two and I don't think either one lasted 2 years.

[KG4CGC]

I've always felt that in climates above the northern area of Florida needed a little boost to the HWH in the Winter months. The tankless WH as a stand alone unit isn't the best idea for what I'm talking about and it only works well when run with gas. Is there even an electric model?

A pair of WH of the same size could work more efficiently (???) if the job of the first one is simply handling 40 degree water and bringing it up to 100 to 110. The second one would not work nearly as hard getting the temp up to ... whatever. We don't set ours high to begin with so, what can I say. Some people want their hot water to peel their skin off right out of the tap.

[kc7jty]

I'm beginning to think one of the complaints I read about the thing I'm interested in is valid, especially for me with the hyper cold water in the hot water line in winter.
The complaint that the water temp coming out of the thing is "all over the place".