Monessen DIS33 Vent Free Fireplace Insert

Monessen DIS33 Vent Free Fireplace Insert

Monessen’s versatile vent-free insert fireplace offers the irresistible charm of an open fire with the high efficiency of a room heater. Monessen vent-free insert provides supplemental heat without the hassles of wood, but with the realism of glowing coals and dancing yellow flames.

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The Monessen DIS33 Vent Free Fireplace Insert turns your wood burning fireplace into an economic gas burning fireplace using either propane or natural gas! Perfect for those tired of cutting and splitting or buying wood, trying to estimate how much is enough year after year. The Monessen DIS33 strives to make installation a breeze for anybody looking to convert from their traditional wood burning fireplace and is able to be equipped using your standard chimney!


  • Featuring the new TRIPLE PLAY BURNER SYSTEM with exclusive triple effect technology producing a full random yellow flame, full depth ember bed, and glowing logs
  • Thermostatically controlled blower (135 cfm), and
  • Standard black removable louver system
  • Fiber ceramic cottage clay firebrick
  • “Remote Ready” Millivolt
  • Flex Line with On/Off shut-Off Valve
  • No venting required for easy installation
  • Heats up to 950 sq. ft., all the heat stays in your home
  • Concealed control panel accessible from lower louver
  • Fixed safety screen for peace of mind
  • CSA design certified
  • Fits minimum fireplace opening of 24″ high and 33″ wide
  • Two face plate surrounds available (Small is 33″ High X 43″ Wide) (Large is 36″ High X 50″ Wide)

Manufacturer Specifications:

  • Dimensions: 33(W) x 23-7/8(H) x 15-1/4(D)
  • Minimum Opening Dimensions: 33(W) x 24(H) x 16(D) 22-5/8(RW)
  • Heating Capacity: Up to 950 sq ft
  • BTU/Hour Input: 19,000 – 28,000
  • Thermal Efficiency: Up to 99%

For full details please refer to the Monessen DIS33 Vent Free Fireplace Insert Gas Fireplace Installation Manual: Click to Read or Download If you have further questions regarding your wood stove purchase contact us at 706.348.7735. All stoves and fireplaces are sold at advertised prices but due to the variances in freight shipping it’s necessary to call in for shipping charges which we compare for the best value to you!

size chest(in.) waist(in.) hips(in.)
XS 34-36 27-29 34.5-36.5
S 36-38 29-31 36.5-38.5
M 38-40 31-33 38.5-40.5
L 40-42 33-36 40.5-43.5
XL 42-45 36-40 43.5-47.5
XXL 45-48 40-44 47.5-51.5


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