Originally Posted by RyanHughes
Update: I just looked closer into Lennox's engineering data for the G60, and it says "Terminal for continuous low speed blower operation." There's your answer. Looks like these things can be setup for continuous low speed operation. I'm not sure what the "low speed" is, though. This is good for comfort; however, a multi-speed blower cannot vary its speed and isn't as efficient as an ECM variable-speed blower.
So, that means the variable-speed blower will turn with anything b/w 0 and some speed constantly (or not) to produce a constant flow for filtering and temperature exchange, and the low-speed one will do samething, but with only one pre-adjusted speed only, right ?