We designed it to carry an 800lb. gorilla. What makes the polymer base pan an important first? Well, perhaps because it can withstand an 800-pound load and our 135 degree, 20-year accelerated heat test. It won’t crack, warp, corrode, or rust and its molded-in color will not fade, ever.

The outdoor environment is unrelenting, with dramatic swings in temperature, precipitation, wind and humidity. Near the ocean, the air contains salt-laden moisture. In and around cities, the atmosphere contains oxides of sulfur and nitrogen, acid and alkaline dust and gases. Most of the other guys' coils can’t stand up to these powerful corrosive forces. However, the carefully selected aluminum alloys in Spine Fin™ provides protection from even the harshest outdoor environments.

Some units endure over 2,600 hours on continuous testing. By putting our heating and cooling units through an equivalent of five years’ worth of wear and tear in a matter of a few months, we reinforce our philosophy of making products you can rely on for years and years. "It's Hard To Stop A Trane" isn’t just a tag line…it’s been proven.

Trane's all-aluminum indoor evaporator coils are revolutionary in an industry tied to copper. Aluminum means longer life leading to resistance to corrosion. An independent, third-party test in a laboratory environment proved that aluminum coils are resistant to formicary corrosion while copper tubed coils are not.

Zinc coated fasteners resist corrosion and keep rust from discoloring your XR air conditioner. While baked-on powder paint provides a finish that is virtually indestructible even if metal gets dented. Maximum corrosion and rust resistant attractively blends with any architectural style and outdoor landscape.