# Tankless water heater question

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

Doing an inspection today with a tankless water heater. What items need to be inspected on such a system? All help is appreciated.

Michael H. Butters

North Texas Inspections

www.northtexasinspections.com

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

Try this thread. . .

http://www.nachi.org/bbsystem/viewtopic.php?t=6184

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Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
(661) 212-0738

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

Thanks Jeff Pope. This info is going to be just what I needed. Thanks for being out there for help on all the BB’s. Your input has been very helpful in all kinds of issues.

Michael H. Butters

North Texas Inspections

www.northtexasinspections.com

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

My pleasure. . .

Jeff Pope

JPI Home Inspection Service

“At JPI, we’ll help you look better”

(661) 212-0738

Originally Posted By: Michael D Thomas
This post was automatically imported from our archived forum.

One more thing about tankless water heaters: don’t confuse them with a wall mounted hydronic boiler such as this one:

http://www.mzboiler.com/

And to make it even a bit more confusing, some of the wall mount hydronics also provide hot water.

Originally Posted By: rmyers1
This post was automatically imported from our archived forum.

The biggest concern in our area for these tankless heaters is combustion air. that (little box) may be rated to nearly 200,000 btu. (bigger than most furnaces)

Simple math for combustion air,… cubic feet of space x 20… = amount of btu area can handle

example: Room 35 x 35 x 8 = 9800 cubic feet x 20 = 196,000 BTU
( Nat. Fuel Codes )

How many rooms in an average home do you see with these dimensions?

Pantries/Kitchens/Closets/ Halls ?

Outdoor combustion air a must. Remember 10 / 1 Rule

I also posted for information on the same subject.......however looking for, personal experience negative responses. No responses yet