Water Heaters, on demand

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Hank

Hank

Joined
Feb 5, 2003
Threads
130
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Location
Oshkosh, WI
I'm looking for an on demand hot water heater for one shop sink. Does anyone have any experience with these things? I found one on the home depot website. http://www.homedepot.com/webapp/wcs...langId=-1&catalogId=10053&productId=100019685

this seems to be the cheapest but they range in price up to $1600. Any one know what I have to spend to get a good one? Also, do they get hard wired in or to they plug in?

Thanks in advance for any help.
 
Hank said:
I'm looking for an on demand hot water heater for one shop sink. Does anyone have any experience with these things? I found one on the home depot website. http://www.homedepot.com/webapp/wcs...langId=-1&catalogId=10053&productId=100019685

this seems to be the cheapest but they range in price up to $1600. Any one know what I have to spend to get a good one? Also, do they get hard wired in or to they plug in?

Thanks in advance for any help.
Click to expand...

I have looked at them, for a under sink one, i would think you would want a GFI plug only. They work well and are very efficent and yes expensive
 
i have installed many insta-hots over the years, mostly applications like wet bars, office sinks ect. i prefer the tankless style for the small size under a sink. they perform very well and can be either hard wire or plug, depends what you get. there are alot more brands out there than when i was in the buisiness so i dont really know about all the latest.
check with your local plumbing supply house to see what they have before you buy from the box store, you never know.
 
Hank said:
I'm looking for an on demand hot water heater for one shop sink. Does anyone have any experience with these things? I found one on the home depot website. http://www.homedepot.com/webapp/wcs...langId=-1&catalogId=10053&productId=100019685

this seems to be the cheapest but they range in price up to $1600. Any one know what I have to spend to get a good one? Also, do they get hard wired in or to they plug in?

Thanks in advance for any help.
Click to expand...

50 amps, 240 VAC, and 12 KHW = way overkill for a single shop sink installation. Sure its "tankless" but think about the dedicated circuit, breaker and wiring for a unit like this. The ones like D'Animal and I are talking about just plug into a normal 110 outlet. They are super insulated and really don't cost hardly anything to operate.

If all you're looking for is to wash your hands with warm water - then forget about the tankless hype and save a pile of cash.
 
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The choice is down to the Bosch AE3.4 for $159 or the Ariston (can't remember model number) which is $149.99. Both are for point of use under sink install. Both are 12.5 amp 110v plug in units. IIRC Both raise .5gpm ~40degrees F which should be fine for our application. Thanks for the help. The local plumbing supply house must be nuts. They want $212 for the Bosch and don't know when they could get it in. Box store has the bosch in the warehouse (3-4 days) and the local True Value Hardware has the Ariston.
 
Waorani said:
50 amps, 240 VAC, and 12 KHW = way overkill for a single shop sink installation. Sure its "tankless" but think about the dedicated circuit, breaker and wiring for a unit like this. The ones like D'Animal and I are talking about just plug into a normal 110 outlet. They are super insulated and really don't cost hardly anything to operate.

If all you're looking for is to wash your hands with warm water - then forget about the tankless hype and save a pile of cash.
Click to expand...

What he said... Get a 6 gal 110 volt 1200 watt waterheater and call it done. Also point of use heaters don't like hard water.

That unit doesn't say the gals per min but at I've see 70 amp heaters that do less than 3 gal per min at 100 degrees rise.


Kevin
 
Waorani said:
50 amps, 240 VAC, and 12 KHW = way overkill for a single shop sink installation. Sure its "tankless" but think about the dedicated circuit, breaker and wiring for a unit like this. The ones like D'Animal and I are talking about just plug into a normal 110 outlet. They are super insulated and really don't cost hardly anything to operate.

If all you're looking for is to wash your hands with warm water - then forget about the tankless hype and save a pile of cash.
Click to expand...

I'll get a pic of mine this morning.
 
I guess mine is not technicaly an on demand model. It's just a little one.

It is mounted on the roof of the bathroom in my shop. I supplies water to the washing machine and the sink. It also keeps up when my wife bathes her horses in the winter.
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Take this for what it's worth because I am not a plumber. I recently did a remodel on my house. I have a friend who did the contracting work on the house. I was set on a tankless system, but he talked me out of it. He says he has taken out more from unhappy owners than he has installed. I had the room for tanks, and he said the only way he would feel right putting them in was if there was a space issue. BTW, he was a plumber before he became a contractor, and still does plumbing work on the side.
 
burling said:
Take this for what it's worth because I am not a plumber. I recently did a remodel on my house. I have a friend who did the contracting work on the house. I was set on a tankless system, but he talked me out of it. He says he has taken out more from unhappy owners than he has installed. I had the room for tanks, and he said the only way he would feel right putting them in was if there was a space issue. BTW, he was a plumber before he became a contractor, and still does plumbing work on the side.
Click to expand...

I've put a few in and the only ones worth a damn are the gas ones and they're pricey. Like you said the ones I've put in are because of space restictions. With the insulation on the new water heaters I don't think the savings outweigh the extra cost and if you want to do recirculation loops then there is no savings.(it has to fire to keep the loop hot).


Kevin
 
I am putting one in soon

I am ripping out my old tank that was heated via my Big Boiler and a heat exchanger. So if my tank became cold the big boiler would heat up and then pump to the tank to warm the water in the tank, in the winter no problem the boiler is alway hot and working but in the summer why keep the boiler hot all of the time just to heat water. I am going with a Rheem on demand system no Loop but who cares I have always had to wait a while for hot water(old house with long pipe runs) The unit is a commercial size and with the tax credit it is not costing that much more than a quality 50 gal tank. I will let you know how it goes.
 
If you are talking your customers out of using Tankless water heaters you are providing a disservice to your customers.
Given, there are a few select applications where a constant heat tank may be needed.
Electric units tend to be only capable at single use locations (ex.- outside bar)
Like anything, you must educate yourself on the capabilities of each unit and match it to the water useage requirements of a household.
Nothing works perfectly in all situations.
Home Depot may not be the best place to find your education, or the water heater you will depend on for YEARS. Tankless or not. That would be comparable to Modding your rig using NAPA only.
aaron
 
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