Direct Fired Gas Heater Efficiency

Two pipe vented gas fireplaces that draw fresh air from outdoors are more efficient than models with a single pipe which rely on indoor air to fuel the combustion process.

Direct fired gas heater efficiency.

As natural gas is an abundant clean and low cost fuel that is readily available this system is very cost effective to operate. These heaters are 100 combustion efficient with an overall thermal efficiency of 92 8 heat loss due to water formation during combustion. With efficiencies up to 97 the effinity is the most efficient gas unit heater in north america. With a good heat to air volume value they provide excellent temperature control with 25 1 modulation capability.

All products of combustion are introduced into the supply air stream at concentrations well below code requirements. Efficiency as nearly 100 of the fuel is being converted to heat fuel consumption and operating costs are reduced. No venting or flue piping is required. Direct firing eliminates the need for heat exchangers resulting in 100 efficiency.

For example let s look at an auditorium with an annual energy usage of 42 000 therms. Modine offers a number of gas fired unit heater solutions. To stand up to corrosive environments our ptp model is the perfect solution while the proven pdp model gives provides great value.