Mr. Heater 6 in. Horizontal Stainless Steel Vent Kit, Category III
Item # 233751199
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Item # 233751199
Valid 5/15/2026 - 7/5/2026
This item is available online only
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The category 3 horizontal 6-in vent kit provides class 3 single wall ducting for use with Mr. Heater Big Maxx unit heaters, ranging from 250,000 to 400,000 BTUs. Complies with US standard (UL1738) and Canadian standard (S636). Designed for horizontal installation only. Kit includes a 6-in male connector, a 45-degree elbow, a 6-in to 19-in long adjustable 6-in diameter vent pipe, a 12-in long 6-in diameter vent pipe, a 24-in long 6-in diameter vent pipe, 6-in INS wall penetration, screened termination, screws, and silicone sealant. Stainless steel is required for horizontal installations per new category 3 certifications. Other parts may also be required for your specific installation needs. Please check and adhere to all state and local codes before installation.
- Category 3 horizontal 6-in vent kit for use with Mr. Heater Big Maxx unit heaters ranging from 250,000 to 400,000 BTU's
- Stainless steel 6 in sealed ducting meets new category 3 certifications
- Includes 6-in male connector, 45-degree elbow, 6-in to 19-in long adjustable 6-in diameter vent pipe, 12-in long 6-in diameter vent pipe, 24-in long 6-in diameter vent pipe, 6-in INS wall penetration, screened termination, screws, and silicone sealant.
- Complies with US standard (UL1738) and Canadian standard (S636)
- This kit provides the pieces needed for an average installation - additional pieces may be needed
| Brand | Mr. Heater |
|---|---|
| Country of Origin | Made in USA |
| Closed Vent Projection | 6 in. |
| Compatibility | Category 3 horizontal 6 in. vent kit for use with Mr. Heater Big Maxx unit heaters ranging from 250,000 to 400,000 BTU's |
| Features | Stainless steel 6 in. sealed ducting meets new category 3 certifications; Complies with US standard (UL1738) and Canadian standard (S636) |
| Frame Material | Stainless steel |
| Maximum CFM | 0 CFM |
| Open Vent Projection | 6 in. |
| Pane Material | Stainless steel |
| Power Type | Natural gas |
| Primary Color | Gray |
| Primary Material | Stainless Steel |
| Product Height | 27 in. |
| Product Length | 23 in. |
| Product Weight | 23 lb. |
| Product Width | 24 in. |
| Shape | Circular |
| Vent Tube Diameter | 6 in. |
| Manufacturer Part Number | F102861 |
Q: What is the OD of the insulated pipe that protrudes through the wall?
a year ago- A: Double wall pipe Inside Dimension 6" - Outside Dimension 7"a year agoHelpful?
Q&As
Q: What is the OD of the insulated pipe that protrudes through the wall?
a year ago- A: Double wall pipe Inside Dimension 6" - Outside Dimension 7"a year agoHelpful?
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