Water Heaters - Water heater vent

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wtkc
12-12-05, 12:19 PM
I planned a remodel but when I went to purchase a tankless WH with a horizontal vent I found that I didn't have enough water pressure to use the unit. Can I vent my existing WH horizontally after a 12" rise?

hankhill6018
12-12-05, 05:06 PM
What's your existing water heater?

The tankless units have induction motors which will allow horizonal venting of the unit.

If you existing water heater has a standard atmospheric type vent, it must be vented up.
sehenry2000
12-19-05, 09:51 PM
wtkc, you said horizontal, but you can buy an adjustable vent elbow that can be adjusted to 45 Degrees (or any angle) or so instead of a 90 Degree ell. That way you are still going up while going sideways. Make sure you use double wall vent pipe. Hope this helps.

594tough
12-20-05, 08:31 AM
Check the National Fuel Gas Code book for specs on how much length of horizontal venting is allowed as a ratio of the total vertical rise. Straight horizontal vent out the wall definitely is not allowed except for units which are designed as direct vent, or power vent.