Overview
The Ventis HEI350 Extra large sized single cast iron door wood burning insert is recommended for heating larger spaces from 1,000 - 2,700 sq. ft. The firebox is lined with refractory bricks for better heat distribution. The HEI240 offers non-catalytic combustion technology, and a Stainless-steel secondary-air system which improves gas combustion. This unit has a 8hr Maximum Burn Time, can hold 22" logs, 110,000 BTU/H Max, and is EPA 2020 approved.
The Ventis HEI350 qualifies for a biomass stove tax credit! What does that mean? How do you take advantage of this credit? Please see our blog explaining the process.
Wood-burning inserts must only be installed inside an existing masonry fireplace and never in a wooden or combustible structure.
- Extra-large size wood insert
- Glass air wash system for a cleaner view of the flames
- EPA certified at only 1.6 g/h
- C-Cast heat shield added to the firestop
- Non-Catalytic combustion technology
- Cast iron door
- 144 CFM blower
Specifications:
- Overall Dimensions: 30 1/2" W x 24 7/8" H x 29" D
- Minimum fireplace opening: 31" W x 26 1/4" H x 18 3/8" D
- Firebox Dimensions: 22 7/8" W x 12 7/8" H x 20 1/8" D
- Door Opening: 19" W x 9 1/4" H
- 110,000 BTUs
- 3.5 ft³ overall firebox volume
- 1,000 - 2,700 ft² heating area
- Optimum efficiency: 75%
- Emissions: 1.6 g/h
- Maximum log length: 22''
- Flue diameter: 6"

Product Resources
The Ventis HEI350 Extra large sized single cast iron door wood burning insert is recommended for heating larger spaces from 1,000 - 2,700 sq. ft. The firebox is lined with refractory bricks for better heat distribution. The HEI240 offers non-catalytic combustion technology, and a Stainless-steel secondary-air system which improves gas combustion. This unit has a 8hr Maximum Burn Time, can hold 22" logs, 110,000 BTU/H Max, and is EPA 2020 approved.
The Ventis HEI350 qualifies for a biomass stove tax credit! What does that mean? How do you take advantage of this credit? Please see our blog explaining the process.
Wood-burning inserts must only be installed inside an existing masonry fireplace and never in a wooden or combustible structure.
- Extra-large size wood insert
- Glass air wash system for a cleaner view of the flames
- EPA certified at only 1.6 g/h
- C-Cast heat shield added to the firestop
- Non-Catalytic combustion technology
- Cast iron door
- 144 CFM blower
Specifications:
- Overall Dimensions: 30 1/2" W x 24 7/8" H x 29" D
- Minimum fireplace opening: 31" W x 26 1/4" H x 18 3/8" D
- Firebox Dimensions: 22 7/8" W x 12 7/8" H x 20 1/8" D
- Door Opening: 19" W x 9 1/4" H
- 110,000 BTUs
- 3.5 ft³ overall firebox volume
- 1,000 - 2,700 ft² heating area
- Optimum efficiency: 75%
- Emissions: 1.6 g/h
- Maximum log length: 22''
- Flue diameter: 6"

Education
The Ventis HEI350 Extra large sized single cast iron door wood burning insert is recommended for heating larger spaces from 1,000 - 2,700 sq. ft. The firebox is lined with refractory bricks for better heat distribution. The HEI240 offers non-catalytic combustion technology, and a Stainless-steel secondary-air system which improves gas combustion. This unit has a 8hr Maximum Burn Time, can hold 22" logs, 110,000 BTU/H Max, and is EPA 2020 approved.
The Ventis HEI350 qualifies for a biomass stove tax credit! What does that mean? How do you take advantage of this credit? Please see our blog explaining the process.
Wood-burning inserts must only be installed inside an existing masonry fireplace and never in a wooden or combustible structure.
- Extra-large size wood insert
- Glass air wash system for a cleaner view of the flames
- EPA certified at only 1.6 g/h
- C-Cast heat shield added to the firestop
- Non-Catalytic combustion technology
- Cast iron door
- 144 CFM blower
Specifications:
- Overall Dimensions: 30 1/2" W x 24 7/8" H x 29" D
- Minimum fireplace opening: 31" W x 26 1/4" H x 18 3/8" D
- Firebox Dimensions: 22 7/8" W x 12 7/8" H x 20 1/8" D
- Door Opening: 19" W x 9 1/4" H
- 110,000 BTUs
- 3.5 ft³ overall firebox volume
- 1,000 - 2,700 ft² heating area
- Optimum efficiency: 75%
- Emissions: 1.6 g/h
- Maximum log length: 22''
- Flue diameter: 6"






