Manual variable heat setting control. Completely vent free with no outside duct or chimney needed. Unit is 99% efficient and has an ODS (oxygen depletion sensor) for safety. Plaque heaters operate just like the sun, providing direct, immediate warmth in the room by heating surfaces rather than the air. No electricity is required - perfect for use during power outages. Push button piezo ignition offers easy start up. No. MN060HPA: BTU Rating: 6000 BTU, Fuel Type: Natural Gas, Venting Type: Vent-Free, Heat Type: Radiant, Control Type: Manual Control, Heating Area: 150 Sq. Ft., Dimensions: 14 In. W x 19 In. H x 6.4 In. D, Weight: 12 Lb., Warranty: 1 Year, Pkg Qty: 1, Package Type: Box No. MN1PHG: BTU Rating: 10,000 BTU, Fuel Type: Natural Gas, Venting Type: Vent-Free, Heat Type: Radiant, Control Type: Manual Control (1 Setting), Heating Area: 300 Sq. Ft., Dimensions: 15.79 In. W x 21.2 In. H x 6.85 In. D, Weight: 13 Lb., Warranty: 1 Year, Pkg Qty: 1, Package Type: Box No. MN2PHG: BTU Rating: 20,000 BTU, Fuel Type: Natural Gas, Venting Type: Vent-Free, Heat Type: Radiant, Control Type: Manual Control (2 Settings), Heating Area: 700 Sq. Ft., Dimensions: 18.5 In. W x 24 In. H x 8 In. D, Weight: 20.1 Lb., Warranty: 1 Year, Pkg Qty: 1, Package Type: Box No. MN3PHG: BTU Rating: 30,000 BTU, Fuel Type: Natural Gas, Venting Type: Vent-Free, Heat Type: Radiant, Control Type: Manual Control (3 Settings), Heating Area: 1000 Sq. Ft., Dimensions: 25.5 In. W x 24.25 In. H x 8.5 In. D, Weight: 24.7 Lb., Warranty: 1 Year, Pkg Qty: 1, Package Type: Box No. ML060HPA: BTU Rating: 6000 BTU, Fuel Type: Propane Gas, Venting Type: Vent-Free, Heat Type: Radiant, Control Type: Manual Control, Heating Area: 150 Sq. Ft., Dimensions: 14 In. W x 19 In. H x 6.4 In. D, Weight: 12 Lb., Warranty: 1 Year, Pkg Qty: 1, Package Type: Box No. ML1PHG: BTU Rating: 10,000 BTU, Fuel Type: Propane Gas, Venting Type: Vent-Free, Heat Type: Radiant, Control Type: Manual Control, Heating Area: 300 Sq. Ft., Dimensions: 15.79 In. W x 21.2 In. H x 6.85 In. D, Weight: 13 Lb., Warranty: 1 Year, Pkg Qty: 1, Package Type: Box No. ML2PHG: BTU Rating: 18,000 BTU, Fuel Type: Propane Gas, Venting Type: Vent-Free, Heat Type: Radiant, Control Type: Manual Control (2 Settings), Heating Area: 700 Sq. Ft., Dimensions: 18.25 In. W x 24 In. H x 8 In. D, Weight: 19 Lb., Warranty: 1 Year, Pkg Qty: 1, Package Type: Box No. ML3PHG: BTU Rating: 28,000 BTU, Fuel Type: Propane Gas, Venting Type: Vent-Free, Heat Type: Radiant, Control Type: Manual Control (3 Settings), Heating Area: 1000 Sq. Ft., Dimensions: 25.5 In. W x 24.25 In. H x 8.5 In. D, Weight: 24.7 Lb., Warranty: 1 Year, Pkg Qty: 1, Package Type: Box