MartinLogan VENT-FREE FIREPLACE SYSTEMS 33ISDG - Manual (Page 5)

23D8036 5
Your vent-free fireplace must be mounted to the floor or the fireplace hearth.
OPERATION
This unvented gas heater requires no outside venting and burns cleanly with high heating efficiency.
Piezo Ignitor
Fireplace
Screen
Control Knobs
PRODUCT FEATURES
Optional
Face Plate
Figure 1 - Unvented Gas Heater with Control Access Door Open
On/Off Switch
Blower
Optional T-stat
Sensor