Is the RE199iN good for a large home?

Yes. At 9.8 GPM and 199,000 BTU it can run multiple showers and appliances together, which suits medium to large homes.

Does it need a special vent?

It is non-condensing, so it uses standard category III stainless steel venting rather than the PVC allowed on condensing models. Vent length and termination must follow the install manual.

Can I control it from my phone?

It is Wi-Fi Smart Connect compatible, which allows remote monitoring and diagnostics through Rinnai's app when the accessory is fitted.

How is it different from a condensing model?

A condensing unit recovers heat from the exhaust and is more efficient, but needs PVC venting and a drain for condensate. The RE199iN vents more simply but uses more gas.

What gas supply does it need?

It runs on natural gas and needs a dedicated line sized for 199,000 BTU. A licensed installer should confirm your meter and pipe capacity.

Can it replace a tank heater?

Yes, it is a common upgrade from a storage tank. It frees floor space and provides continuous hot water, but the gas line and venting usually need modification.