Gas Combo 1&2

CCHT was used to assess the relative energy performance of two different natural gas-fired combo systems. The systems were installed in one of the test houses and their energy performance was compared to the energy performance of a high efficiency condensing furnace and a storage-type power-vented water heater in the identical (twin) house next door.

The Combo 1 heating system consisted of a storage-type power-vented water heater and an air handler that was connected to the house's forced-air distribution system. The Combo 2 system was connected in the same manner but featured a high-efficiency storage-type condensing water heater.

The simulated field test program demonstrated that both Combo systems were capable of satisfying real-life demands for combination residential space and water heating loads in line with the combined annual efficiency (CAE) claimed by the manufacturers.

Papers

ARCHIVED - Benchmarking twin houses and assessment of the energy performance of two gas combo heating systems (PDF format, 458 KB)
Swinton, M.C. Entchev, E. Szadkowski, F. Marchand, R.G.
9th Canadian Conference on Building Science and Technology (Vancouver, B.C., 2003- 02-27)
pp. 365-381. 2003-02-01

Research Highlights

Assessment of the Energy Performance of Two Gas Combo-Heating Systems (PDF format, 223 KB)