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Tool Talk Discussion Forum

O/T tankless water heaters

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Nancy Howell

05-20-2008 12:30:05




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I"ve seen some of the posts about solar water heaters and was wondering if anyone had any experience with the tankless heaters.




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tractormarkb

05-23-2008 06:00:25




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
Tankless water heaters are great, use less energy and never run out of hot water. You can get SOLAR TANKLESS WATERHEATERS that you can use with a solar water heater that will not heat up your already heated water and keep it close to a set temp.



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dave2

05-21-2008 12:58:18




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
I didn't know something like them even existed until I got out of the Army here and rented an apartment in a real old farmhouse. The one there was propane and about 40 years old at the time. Worked fine. Electric is just less trouble (venting). The only reason I don't use it through the winter is we have radiant heating and the hot water in the tank helps keep the radiator water warm without the burner running so often. It takes 5 minutes to make the switch, so in mild weather, I cut the heat and use wood and the electric water heater.

Dave

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Stephen R. Horton-TX

05-21-2008 11:20:38




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
We've got 2 5GPM Rinnai Continuum (sp?) Propane units that do all the hot water in our house. We go through 250 gallons of propane in 24 months. But, we're in Texas, so the temperature differential isn't as large. Wouldn't trade them for the world, lots cheaper in my opinion.



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dave guest

05-20-2008 20:04:36




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
Nancy, in Mich. electric and gas are neck to neck. But if you got propane, choice is obvious. Tankless don't exactly run out of hot water, but if you have 2 shower and wash clothes at the same time there can be problem. How many kids would be a factor because there is a limit to how much hot water you can produce at one time. The natural gas needs I believe a one inch supply. Problem for most homes. Also stack size is 6" compared to 4". Check it all out depending on your situation and state.

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buickanddeere

05-20-2008 19:13:39




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
Fast, efficient, no piping and storage tank losses. If your LP is $3.00/gallon and electricity 13.5 cents per KW/hr. A tankless electric is costing you less than a tankless LP unit. Safer and less fuss too.
They are the Cat's pj's.



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circus

05-20-2008 16:13:11




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
They're fine but size is critical because there's no buffer. Most raise the water temp a preset number of degrees so 50 in 120 out, 120 in 190 out. Dangerous. So you wouldn't preheat with solar using that model.



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dave2

05-20-2008 12:55:12




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
Pretty common here in Germany. Ours isn't any bigger than a typewriter and is worth it's weight in gold. Appliances heat their own water, so the output doesn't have to be any more than what you'd need for a shower, etc.

Our's is electric.

Dave



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gun guru

05-20-2008 13:07:04




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 Re: O/T tankless water heaters in reply to dave2, 05-20-2008 12:55:12  
How much electricity does it use? is it 240VAC (2 pole). Can you run more the shower and the dishwasher at the same time?



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dave2

05-21-2008 05:03:42




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 Re: O/T tankless water heaters in reply to gun guru, 05-20-2008 13:07:04  

gun guru said: (quoted from post at 13:07:04 05/20/08) How much electricity does it use? is it 240VAC (2 pole).
Can you run more the shower and the dishwasher at the same time?


It's 380-400 volts. Basic stuff (hair dryer, coffee pot dishwasher, etc is 230 volt and major stuff is double (+/- a little).

I always say I'm gonna take a reading and see just how much power it uses but always forget. With heating oil at $5.50 a gallon we make money using the electric. There's only two of us, so the most that would happen is 2 people running water at the same time. Dishwashers and clothes washers use only cold water and heat it themselves. You can also get a small (230 volt) unit for each sink, shower, etc if you want. I just have mine set up by the normal boiler that I use for heating in winter, so I can switch a connection and cut oil use completely in summer.

Dave

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RN

05-20-2008 12:43:52




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
Small electric tankless inline heaters used in mobile homes- neighbors had one for kitchen use and later put another inline for shower use, worked fairly good for them. 110 volts, 120 degree water setting units- warmed up in less than a minute. The shower unit was a temperature delayed unit that took about a minute to reach the 120 degrees temperature before started flowing. Heating element is inside a 1/2 gallon or so small tank. Handy for house if the water use is far away from a main heater, dishwasher/shower units can be 140 degrees or so depending on unit and adjustable settings. $80.00 about 10 years back for a 110 volt simple one, 220 volts, 180 degree available for higher price could be used for cleaning a Surge milking bucket in barn or dishwasher in dining hall- the examples the plumbing suppy store had. RN.

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JBMac

05-20-2008 12:38:33




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 Re: O/T tankless water heaters in reply to Nancy Howell, 05-20-2008 12:30:05  
Nancy,

We had one installed in our new home in 2007. That year, they were offering a tax credit of around $600, so it really only cost us $400 over what the contractor was going to install. We love the thing. Between the oven, range and water heater, our lp bill runs around $30-$40 per month. It would be cheaper if you were attached to a natural gas system. There is only two of us for now (little one will be here in a couple of weeks...) but it seems to keep up with demand fine. They told me it would basically run 3 major appliances at once (shower, dishwasher, washing machine, etc) Course that depends on the gpm requirments of each. Make sure you get one with a gpm flow that will meet your needs. One things for sure, you can take a hot shower for two weeks straight if you wanted! Heats up as fast as any house I've ever lived in as well.

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