Furnace replacement for a 1977 Trillium 4500

[David Tilston]

Slowing the fan may not be a good idea. The sail switch will shut off the furnace if the air flow falls too low. Heat build up could be dangerous. Search this sight for pulse width modulation, (PWM) for a cheep way to control the speed of a fan.

It is probably best to replace your Wagon Master furnace. They have a bad rep for leaking the products of combustion.

[drdog]

Thanks for the info. I'm getting rather used to the noise and barely notice it now. Even the dog doesn't care any more.....