Engineer Presentation. Efficiency - GAS. Clamshell Heat Exchanger 80% Efficient. Typical two furnace unit. 400 °F. 1700 °F. Typical two furnace unit. 70 °F. 120 °F. 20 °F. 80 % Efficient. 75% Efficient. Air Stratification - Typical Heat Exchanger. 10-15 °F Δ T. Heat Exchanger.
Efficiency - GAS
Clamshell Heat Exchanger80% Efficient
10-15 °F ΔT
Tubular Heat Exchanger 82-83% Efficient
Sizing - Series
600 MBH input
Sizing - Parallel
300 MBH input
??? °F ΔT
Single Stage VS Modulation
The minimum turn down must be set to ensure condensing in the secondary heat exchanger or both heat exchangers must be made out of stainless steel.
The Power Venter/Draft Inducer’s airflow directly affects the gas to air ratio at the burner. The ratio must be set to keep Air Free CO below 400 PPM.
Minimum Turn Down Limitation
Xcelon w/ Integral Condensing Boiler
Hot Water Coil
Efficiency - ELECTRICAL
Efficiency – Heat Recovery
VFD & Transformer
This recovered waste heat increases the efficiency by 1+%