I am replacing a 15-year old 10 SEER Ruud package system using propane for heat and have been given quotes from various contractors on the following 2-ton package systems...
Goodman GPG15 Series single stage compressor, dual stage burner 15 SEER unit that burns propane for heat.
Amana APG15 Series 15 SEER unit. It appears to be identical to the Goodman with the exception of stainless steel burner instead of "corrosion-resistant T-140 aluminzed steel tubular heat exchanger" in the Goodman - although I was told it also has different controls. Lifetime compressor, lifetime heat exchanger vs. 10 years compressor, 20 years heat exchanger on the Goodman unit.
Trane XL14C which also has single stage compressor (up to 14.2 SEER), dual guage burner but this is a dual fuel unit with heat pump and propane backup. This unit also has a variable speed blower motor, stainless steel heat exchanger and burners. Warranty is 10 year compressor, 20 year heat exchanger. Price of this unit is comparable to the Goodman GPG15 one.
I live in Raleigh NC. Given the volatility of propane prices I was leaning more towards the Trane XL14C even though it has a lower SEER because of the dual fuel feature. The contractor who offered the Goodman unit was unsure if the fan was variable speed or not and was to follow-up with me tomorrow.
When talking to the contractor who offered the Goodman and Amana product, I asked him if he could provide Trane equipment and he said he did not and had no plans to be involved with Trane and that I would experience a lot more problems with needed part replacements on a dual fuel unit. He also indicated the Trane design was prone to rust problems. His explanation to me was that the air hit the evaporator coil first on the Trane versus last on the Goodman unit and that the conditioned air on the Trane would create rust issues as it moved over the various parts in the Trane unit.
Is there any validity to the increased need for replacement parts in the Trane versus the Amana or Goodman units? Which unit would you pros recommend?