Heating and Cooling› Heaters

Mr. Heater

HORIZONTAL 6IN VENT KIT (CATEGORY III)

$1,200.77

SKU: M023 F102861

In Stock
In Stock
Ships by Jun 8
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Mr. Heater F102861 is a Category III 6-inch Horizontal Vent Kit compatible with Mr. Heater, Enerco, and HeatStar Big Maxx unit heaters (250,000 to 400,000 BTUs).

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMr. Heater
Part NumberM023 F102861

Videos

Mr Heater Big Maxx - How I installed and COST.

Mr Heater Big Maxx - How I installed and COST.

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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