Just like baking needs to be done at a different temperature for high altitudes, some boilers require different BTU loads at higher altitudes. Triangle Tube condensing boilers require a higher load above 2000 ft of elevation. These boilers need 2% more BTU rating per 1000 additional ft, so if you are 4000 ft above sea level, you will need 4% more BTU's than someone at sea level.
High efficiency boilers and Triangle Tube boilers can be found at www.supplyhouse.com
