What Is The Difference?
Economy
The TG9S line is a great furnace for minimal investment. It provides unparalleled reliability with a 10-year parts warranty, lifetime heat exchanger warranty, and an available 10-year labor warranty. Producing a 95% efficiency rating, this furnace does the job on a budget!
Good
The TM9E line produces a 95.5% efficiency as well, but also has the Electronically Commutated Motor (ECM) motor for maximum savings on your hydro bill; while the economy line only has the Permanent Split Capacitor (PSC) motor. This furnace produces savings on your hydro. This is a solid furnace with a 10-year parts and lifetime heat exchanger warranty, and an available 10-year labor warranty.
Better
The TM9Y line has 96% efficiency rating due to using a two-stage gas valve over the conventional single-stage in the TG9S and TM9E models. Two-stage gas valves only open halfway, saving you fuel in months like October-November and March-May.
Best
The CP9C line is the best of the best, combining the energy star rated Electronically Commutated Motor (ECM) motor with a modularity gas valve that adjusts automatically to meet demand with the best efficiency. This gives it a staggering 98% efficiency rating.