Hi,
We are looking to replace a standard 75gal water heater with a tankless unit. The original unit has an external recirculating pump and 1/2” gas line and shares the vent with the furnace (which has a 3/4” gas line next to it).
So far the brand names discussed have been Noritz (EZTR75) and Navien (NPE-240A2). Both specked at around 11.2GPM and 199k BTU. What are the good/bad points of both brands? Any others I should consider?
Looking at the pictures attached, which brand name/model would you recommend here? Should I stick with the old recirculating pump or go with a tank that has one built-in?
The house was built in 1988. We are looking to have the replacement tankless heater stay indoors and use as much of the existing hook ups as possible. Most notably the venting. Can it be directly attached to the existing vent or does a flexible hose have to be pushed all the way through to the roof? Any problems with the vent being shared with the furnace?
With regards to gas line the plan is to tap into the 3/4” line dedicated to the furnace. Could this possibly interrupt the gas flow on both the furnace and the tankless unit when they are being utilized? Is it common practice to splice both the 1/2” and 3/4” gas line to ensure no loss of volume to either the tankless unit or furnace?
Thanks in advance!
We are looking to replace a standard 75gal water heater with a tankless unit. The original unit has an external recirculating pump and 1/2” gas line and shares the vent with the furnace (which has a 3/4” gas line next to it).
So far the brand names discussed have been Noritz (EZTR75) and Navien (NPE-240A2). Both specked at around 11.2GPM and 199k BTU. What are the good/bad points of both brands? Any others I should consider?
Looking at the pictures attached, which brand name/model would you recommend here? Should I stick with the old recirculating pump or go with a tank that has one built-in?
The house was built in 1988. We are looking to have the replacement tankless heater stay indoors and use as much of the existing hook ups as possible. Most notably the venting. Can it be directly attached to the existing vent or does a flexible hose have to be pushed all the way through to the roof? Any problems with the vent being shared with the furnace?
With regards to gas line the plan is to tap into the 3/4” line dedicated to the furnace. Could this possibly interrupt the gas flow on both the furnace and the tankless unit when they are being utilized? Is it common practice to splice both the 1/2” and 3/4” gas line to ensure no loss of volume to either the tankless unit or furnace?
Thanks in advance!
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