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DIS33 Series Vent Free* Gas Insert

Bring your old, wood-burning fireplace to life with a vent free insert from Monessen. It’s easy to install, and its Triple Play Burner System® and Cottage Clay firebrick add a comfortable touch of home to any space. Read More

Model Details

Triple Play Burner System®
Triple your pleasure — The burner system produces full, yellow flames with a unique triple effect that delivers an authentic, randomly flickering glow.
Standard Blower Included
Save on utility costs — The heat-activated blower features variable speed controls to help distribute the fireplace’s warmth efficiently.
Deluxe Control Panel
User friendly controls — The full-featured control panel conveniently lifts off, so you can add a blower or other upgrades with ease.
Up to 28,000 BTUs
Stay warm and cozy — This insert delivers a range of BTUs from 19,000 to 28,000, so you'll stay nice and warm while efficiently heating the room to help lower heating costs.

Quick Look

Heating Capacity
Up to 950 sq. ft.
Max BTU / H
Thermal Efficiency
Up to 99%
Cost to Operate
$0.30 / $0.76**

* The use of vent free appliances is prohibited in Canada and some US states. Please check your state code for vent free products.
** Based on cost/therm. According to the Federal Register Energy Conservation Program for Consumer Products.

Guides & Literature

Finishing Options

  • Black Face Plates Black Face Plates DIFACEB-SM, DIFACEB-LGThese faceplates add a dramatic accent to your fireplace installation. They are available in 2 sizes.
  • Volcanic Rock Volcanic Rock VR1000AVolcanic rock brings a weathered, organic look to your fireplace.
  • Ceramic Fiber Cinders Ceramic Fiber Cinders CINDERSExtra cinders add a touch of realism to your gas fireplace's flame presentation.
  • Thermostat Bulb Sensor Thermostat Bulb Sensor TSAdds thermostat control to millivolt ignition fireplaces.
  • On/Off Remote Controls On/Off Remote Controls RCB(E), RCMT, TSMTOn/Off control systems allow you to ignite and turn off your fire remotely, and they feature safety features such as a child lockout mode and thermo shutdown. Visit Ambient Technologies for more information.
  • Thermostat Remote Controls Thermostat Remote Controls RCST(E), RCT, TSSTThermostat remote systems allow you to input your desired room temperature, and they feature safety features such as a child lockout mode and thermo shutdown. Visit Ambient Technologies for more information.

DIS33 Series Model Line-Up

Unique features by model number

Model Number DIS33NVG DIS33PVG
Max BTU/H (Natural Gas) 28,000 N/A
Max BTU/H (LP) N/A 28,000
Cost to Operate $0.30 $0.76
Fuel Type Natural Gas Liquid Propane

Common features for this family

  • 33 (W)
  • 23-7/8 (H)
  • 15-1/4 (D)
Minimum Opening Dimensions
  • 33 (W)
  • 24 (H)
  • 16 (D)
  • 22-5/8(RW)
Heating Capacity Up to 950
Ignition System Millivolt
Termination None
Certifications CSA Design
Spec Sheets
& Manuals