OK, this may sound dumb but I am new to this... Why do they say it is recommended to have the high ( calling for heat ) settings on 9-9 ? Is it more efficient like that ? Wouldn't it just blow cold air when it goes into low with heat on 1 and blower on 9 ? Also should I change the LFF and LBA now that the thermostat is hooked up ?
Thanks...
Thanks...