IS YOUR CHAT LINE IN OPERATION? Have a ? about altitude re. RP2100 replacement. Have had an RP2100 (206,000 BTU NG) for about 30 years. It has worked well but recently developed circuit board instability problems and am thinking of replacing it with a new RP2100 (266,000 BTU NG). Altitude here in Tucson is about 2500'. Other than a reduction in rated BTU output due to altitude are there any other factors to consider? The previous unit was used infrequently to heat an in ground spa but not used extensively to heat the pool. THe new unit would be used in the same manner.
