|Navien NR-180A Tankless Hotwater Heater from the front|
Note also the venting for the room, which runs right along side the water and drain pipes (the Navien will sit above this vent). I'm not sure this venting is required. The vent drops very cold air into the room during winter, and may freeze water in the pipes. There is a gas furnace in the room, but it is vented separately.
|Vent to outside right under where the Navien will be installed.|