TANKLESS?

Originally Posted By: gluck
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Tankless. No I am not talking about the Canadian Army. We have a superb fleet of septic tanks standing at the ready!


I am supposed to look at a house on Friday that has a tankless water heater. I have never encountered such an animal in person before. Has anyone had dealings with an electric tankless hot water system? What did you think? What should I look out for?

Thanks in advance!
An enquiring mind .......


Originally Posted By: rbrown1
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Try this site George


http://www.builderswebsource.com/techbriefs/tankless.htm


Originally Posted By: jschwartz1
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gluck wrote:
Tankless. No I am not talking about the Canadian Army. We have a superb fleet of septic tanks standing at the ready!

I am supposed to look at a house on Friday that has a tankless water heater. I have never encountered such an animal in person before. Has anyone had dealings with an electric tankless hot water system? What did you think? What should I look out for?

Thanks in advance!
An enquiring mind .......


A plug! ![icon_wink.gif](upload://ssT9V5t45yjlgXqiFRXL04eXtqw.gif)

The link provided is a good one.


--
Jay Schwartz
Coast To Coast Home Services, Inc
www.Coasttocoasthomeservices.com
Southeast Florida NACHI Chapter - VP www.floridanachi.org
NACHI - Legislative Committee Member
MAB - Member

Originally Posted By: gbeaumont
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Hi to all,


George, these are real simple, I grew up with these in England, either it produces hot water or it don't, check the flue (normally balanced type) but other than that you're done.

Regards

Gerry


Originally Posted By: phinsperger
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Many Home Depots have one on display is you want to see one up close and personal


Originally Posted By: aleleika
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gbeaumont wrote:
Hi to all,

George, these are real simple, I grew up with these in England, either it produces hot water or it don't, check the flue (normally balanced type) but other than that you're done.

Regards

Gerry


Doesn't it still need a relief valve? You say its electric, but even the gas tankless water heaters have electric hooked up to it. Someone might have told you it was electric because they see the electric hook up to it. If it happens to be gas then you still have to worry about confined space.


--
A. Dan Leleika
www.a-teamhomeinspections.com

Originally Posted By: mthomas2
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http://www.nachi.org/bbsystem/usrimages/T/TakagiTM1.jpg ]



but it uses more than twice the gas as the furnace(!)

[ Image: http://www.nachi.org/bbsystem/usrimages/T/TakagiPlate.jpg ]

High input BTUs also mean gas line line sizing is another thing to watch, most units require ?? ALL THE WAY to the unit - when I talked to the Takagi rep on another matter he told me around 80% of the problems he sees on new and retrofit installations are the results of undersized gas supply. Sizing this is beyond most SOPs, but if you see a 1/2" pipe serving one such a unit, try to check the installation instructions.

Some other units are sealed (see below), drawing their air from the exterior, on both types of units look for a back draft preventer (directly above both the units shown here and marked with an arrow below) in freezing climates, units can and freeze and burst otherwise.

Most require SS vent pipe sealed with high-temp (red) sealant per manufacture?s instructions (arrow at left):


[ Image: http://www.nachi.org/bbsystem/usrimages/T/TakagiSealed.jpg ]


Though not required, drain valves are a sign that the plumber was familiar with such units:


[ Image: http://www.nachi.org/bbsystem/usrimages/T/TakagiDrain.jpg ]

On some of the Takagis, if an output temp other than the factory pre-set (around 125F) is desired, an accessory wired remote control is required.


[ Image: http://shop.com.edgesuite.net/ccimg.catalogcity.com/220000/228700/228774/products/22541432.jpg ]


Originally Posted By: dvalley
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Michael,


Good info., for those who are not familiar with the tankless water heater.


--
David Valley
MAB Member

Massachusetts Certified Home Inspections
http://www.masscertified.com

"Some cause happiness wherever they go; others, whenever they go."

Originally Posted By: gluck
This post was automatically imported from our archived forum.



Thanks Robert. that is a good site and very informative.


Thanks too, Michael. Interesting pictures. I particularly liked the one showing plastic bags filled with paper sitting on top of th unit next to the exhaust!!!


It is this sort of help that makes my N.A.C.H.I. membership worth every penny! I shall now sally forth to meet the beast! HUZZAH!