Required for applications over
14" W.C. supply pressure
S&H
$100./ unit
S405
> Safe
fuel shutdown if combustion air is interrupted > Low
housing temperature > Quick
change from LP or Nat gas / handle > Safe
monitoring of combustion, one trial > Electronic
ignition w/ 1.0 second shutdown > Protects
heater by shutting down if unit is overfired >Tested
to ANSI standard Z83.7 > Automatically
cycles the heater on/ off with > a
2 second fan shutdown delay > Indoor
/ outdoor use