Dimensions (D*W*H)": 36": (12.75*41.38*26.75)"
48": (12.75*53.31*26.75)"
72": ( 14.44*82.75*27)"
Framing Dimensions (D*W*H)": 36": (14.25*43.38*33.69)"
48": (14.25*55.38*34)"
72": (14.25*81*33.69)"
Fuel Type: Gas
Vent Type: Direct Vent
Vent Size:

36": 4.0" x 7.0"
48": 4.0" x 7.0"
72": 5.0" x 8.0"

Ignition Type: Electronic
Installation: Zero Clearance
Style: Linear
Vent Inner Diameter: 4"
Vent Outer Diameter: 7"
Weight: Not Specified
BTU: 36": 16000 (Heats Up To 0500 Sq. Ft.)
48": 21000 (Heats Up To 0700 Sq. Ft.)
72": 35000 (Heats Up To 1000 Sq. Ft.)
Battery Backup: Yes