I am reading about "direct vent" natural gas heaters which use a hole
through the wall for intake air and exhaust. And some seem to be "staged"
in that they will have a lower burner/fan amount for say warmer days, yet
have the burner on full blast and fan on full blast when needed for very
cold days.

And these seem to be *very* efficient, energy saving, etc.

I am looking at a "7 stage" Rinnai RHFE 1004FA 38,400 BTU Model...$1449.95

Is this the most energy efficient heater of this type?

Can this be installed under a window?

If buying on the internet, do I need a "U.S." model?

Also my electricity goes out briefly about once every two weeks (live in
rural area). Will this unit work by keep its settings after a power outage?

Best price for U.S. model on internet?

Are you heating a house or your shop? In a warehouse I would use
Co-Ray-Vac or Space Ray. Rinnai is supposed to be good stuff but is
high tech. Many contractors who put it in can't fix it. Kind of
expensive too. Defininately NOT DIY job! Worked on a Rinnai in a
commercial laundry, had to be reset after a power failure, for the
model they had.

Stretch

For my house.

I plan to have pro install it. Don't mind high tech as I am an electronics
technician type.


"Stretch" wrote in message
Are you heating a house or your shop? In a warehouse I would use
Co-Ray-Vac or Space Ray. Rinnai is supposed to be good stuff but is
high tech. Many contractors who put it in can't fix it. Kind of
expensive too. Defininately NOT DIY job! Worked on a Rinnai in a
commercial laundry, had to be reset after a power failure, for the
model they had.

Stretch