Will it work during a power outage?

Yes. Ignition runs on two D-cell batteries, so it does not need household electricity to light. You still need a gas supply and water pressure.

Can I use it with propane instead of natural gas?

Yes, it is set up for either natural gas or propane. Propane comes from a tank rather than a pipeline, so the regulator and orifice must match the fuel you use.

Can it be installed indoors?

It is designed for outdoor installation and cold-weather use with little venting. Indoor placement depends on local venting and gas codes, so check with a licensed installer.

How much hot water can it deliver?

It is rated 18 liters, or 4.8 GPM. That flow supports a shower or a sink, but running several hot taps at once will lower the temperature at each.

Does the water temperature stay steady?

There is no electronic modulation, so output temperature follows flow rate and incoming water temperature. Slower flow gives hotter water; higher flow gives cooler water.

What do I need to install it?

A gas line sized for the unit, a water inlet and outlet, two D-cell batteries and a mounting spot outdoors. A qualified gas fitter should make the gas connection.