Montebello DLX 40

Fuel: NG or LP
Heating Capacity*: N/A
BTU Input: Natural gas 32,000 to 50,000
BTU Input: Propane 32,000 to 50,000
Thermal Efficiency: Natural gas 35.8
Thermal Efficiency:
Propane 42
Viewable Area:
37 5/8"" W x 29 9/32" H
Shipping Weight: N/A
Venting Collar Size: 8.5" inner - 11" Outer coaxial direct vent
Warranty: Limited lifetime

Montebello DLX 45

Fuel: NG or LP
Heating Capacity*: N/A
BTU Input: Natural gas 38,500 to 60,000
BTU Input: Propane 38,500 to 60,000
Thermal Efficiency: Natural gas 51.2
Thermal Efficiency:
Propane 47
Viewable Area:
40 1/8"" W x 34.5" H
Shipping Weight: N/A
Venting Collar Size: 8.5" inner - 11" Outer coaxial direct vent
Warranty: Limited lifetime

*Square-feet heating capacities are approximations only. Actual performance may vary depending upon home design and insulation, ceiling heights, climate, condition and type of fuel used, appliance location, burn rate, accessories chosen, chimney installation and how the appliance is operated.

Steady State Rating: Since most homeowners use their fireplaces for an extended time Steady State measures how efficiently your fireplace converts fuel to heat once it is warmed up and running in a "Steady State".

AFUE rating is more typically used for furnaces that continually cycle on and off to maintain a constant temperature.