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Tankless update...

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Tankless update...

Postby Daniel Meyer on Sun Nov 27, 2011 3:34 pm

We had a dozen for dinner Thursday evening...10 for lunch I think...a bunch of overnight guests all weekend...dishes... breakfasts...lunches...showers...etc etc etc etc...

Just shooed the last of the lot out a few minutes ago...

I gotta say...love love love LOVE LOVE LOVE LOVE our gas tankless water heater. ABSOLUTELY the best decision possible for what we've done. Flawless performance, unlimited hot water, no space used in the house, no stack, economical...

Did I mention the endless hot water? I can't even begin to count the number of dishes we washed this weekend...and the number of bodies washed in showers and our massive (6 foot) ball and claw tub....

Did I mention the endless hot water? As in, endless?

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Eeeeennnndddllleeessss! :)

(I should mention there is a cover for that cabinet that I put on after installation and it hasn't been off since)
CUAgain,
Daniel Meyer
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Re: Tankless update...

Postby s.kelly on Mon Nov 28, 2011 9:21 am

We had one put in last year to gain space in the kitchen. The endless hot water is great. No worries about dishes first or showers first. Ours is an exterior monuted unit. Basically 9 sq feet of living space we got back.
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Re: Tankless update...

Postby shazapple on Mon Nov 28, 2011 10:50 am

You are seriously making me think of upgrading. We already have a unheated tank hooked up to our heat pump as a pre-heat to our normal electric water heater.
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Re: Tankless update...

Postby Lynners on Mon Nov 28, 2011 11:43 am

I would really like a tankless water heater, and I think the boyfriend would too...the cost is a worry, though. There are government rebates available, but only for propane or gas fired versions, which is irritating.
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Re: Tankless update...

Postby Lynners on Mon Nov 28, 2011 11:46 am

And now I remember why we can't have one. All of the electric models we've come across require a 200 A service. Boo.
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Re: Tankless update...

Postby Daniel Meyer on Mon Nov 28, 2011 2:00 pm

Lynners wrote:And now I remember why we can't have one. All of the electric models we've come across require a 200 A service. Boo.


There is no realized energy benefit to the electric tankless and the gummit/electric folks are not encouraging them. The goal/savings on electric focus is in getting peak demand down, and those need lots of power at once.

Soon, we will be billed not just on electric usage, but also on peak demand so I would not go with an electric tankless.

If you have gas though, it's the boss!
CUAgain,
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Re: Tankless update...

Postby Lynners on Mon Nov 28, 2011 2:03 pm

Ah I see, thank you for explaining that! I love this place.

In Ontario we are already billed based on the time of day. I don't even know how much the province spent on "smart" meters!
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Re: Tankless update...

Postby s.kelly on Mon Nov 28, 2011 9:36 pm

Heard real mixed reviews at best on the electric ones. Mine is nat gas, but propane is probably just as good

I had to have the gas service reinstalled, but we want it long term for the stove anyway

Gas charge just about equal to the reduction in electric bill, but paying I think that is good considering all the account service charges etc. Feel sure net energy usage is down.
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Re: Tankless update...

Postby triguy128 on Tue Nov 29, 2011 11:08 am

I think you'd have trouble getting the BTU's for electric for true continous hot water. Just too much resistance heat needed. It's easy to have 80kBTU's worth of burners even in a small package. That's 23kW!!!... nearly 100Amps on 240 single phase service.

As a result, they are typcially closer ot 50k BTU max... and therefore fall short on continous delivery. Even worse, if the power goes out, it's not realistic to use a back-up pwoer source for that size unit. Most whole house generators are only 15-20KW. So you're left without hot water.

For next year, I have a AO Smith Vertex on my radar. Although I might consider a takless unit, but I like having the benfit of some storage and the ability to possibly add add a recirculation loop some day so we get hot water upstairs instantly. Actually, I need to consider relocating the HWT, so it's closer to the kitchen and 2 bathrooms where the water is actually needed. It would be worth the expense of running gas pipe an extra 15'. The current gas HWT vents directly (unlined) into our masonry chimney. So did the previous gas boiler.... with a 10" vent. That puppy must have been around 180 or 200k BTU!
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Re: Tankless update...

Postby Daniel Meyer on Tue Nov 29, 2011 1:25 pm

triguy128 wrote:I think you'd have trouble getting the BTU's for electric for true continous hot water. Just too much resistance heat needed. It's easy to have 80kBTU's worth of burners even in a small package. That's 23kW!!!... nearly 100Amps on 240 single phase service.


Just as a comparison to those numbers, our tankless is capable of 140,000 BTU's
CUAgain,
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