This study was designed to evaluate the effect of altitude on the performance of fan-assisted gas-fired residential furnaces. Output from standard furnace tests performed on five
different furnaces at three different altitudes (Sea Level, 2,250 ft (685 m), and 6,700 ft (2040 m)) are presented.

The furnaces cover Venting Categories, Direct and Non-Direct venting
configurations, two ignition system types and steady-state thermal efficiencies. Both Natural Gas and Propane Gas were used as fuels. Each fuel was taken from a single
source and transported to the test sites in order to minimize effects of fuel
variability. In all tests the same instrumentation was used.

Contents: Zipped file containing a pdf of the final report, 47 files of generic data and a Legend text file.

Units: Dual