An undersized gas line can stress a tankless system and possibly reduce its lifespan all rinnai tankless water heaters are equipped with technology that safely ceases operation if they detect an inadequate gas flow.
Tankless water heater with 1 2 inch gas line.
Typically tank water heaters have their gas connection near the floor and the water lines near the ceiling with tankless the connections are all along the bottom face of the machine.
There is a lot of extra cost in potentially upgrading the gas line and new venting.
Rinnai tankless water heaters are designed to provide maximum performance and efficiency using either a 3 4 or 1 2 gas line as long as sufficient gas flow is available.
Many of the accessories are sold under the ao smith label with identical part numbers to the takagi counterparts.
I can not answer the 1 2 in question but having priced out a tankless hot water heater there is not any savings in the long term.
Atlanta tankless water heaters 27 769 views 3 25 upgrading to a truma endless hot water heater aquago comfort install for rv living full time duration.
Takagi is now owned by ao smith.
When at full power tankless units require between 120 000 and 199 000 british thermal units btu three to five times the heating capacity of a tank type water heater.