Reply With QuoteTank-less heaters need a 4" vent. Most tank type heaters are 3". Plus you may need a larger gas line. Tank-less are 3/4" and tank type are 1/2".
John
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New Tankless Water Heater
I need a new water heater and I am thinking about a tankless unit.What I want to know is can I vent it through the existing vent from my old water heater or do I have to run a new vent.
Tank-less heaters need a 4" vent. Most tank type heaters are 3". Plus you may need a larger gas line. Tank-less are 3/4" and tank type are 1/2".
John
A tankless water heater is much more efficient which means more moisture in the exhaust. You "can not" use the old chimney.
You will need either a new plastic or a new stainless. Most are being done with plastic.
The old galvanized steel won't cut it.
Last edited by Terry; 03-03-2013 at 02:00 PM.
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