ProCom ML300HBA-B Ventless Blue Flame Propane Heater
- Indoor Outdoor Usage: Indoor
- Fuel Type: Propane
- Heating Method: Convection
- Heating Element: Radiant
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A high-output ventless propane heater built for large spaces, with manual control that keeps the price down compared to thermostat models.
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ASIN: B0DFMKHY65Model: ML300HBA-BCategory: Propane Space Heaters
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Overview
A 30,000 BTU ventless propane heater with a blue flame burner and manual low, medium and high control, rated to heat spaces up to 1,400 square feet. It ships with base feet for floor placement and a bracket for wall mounting.
ProCom's ML300HBA-B sits at the large end of ventless propane heaters, aimed at garages, workshops or large open rooms rather than a single bedroom. The oxygen depletion sensor cuts the burner automatically if room air gets too low on oxygen, the safety feature that lets a ventless heater run indoors at all. A separate blower, model PF06-YJLF-B, is available for pushing heat further across a room.
- 30,000 BTU maximum output
- Heats up to 1,400 sq ft
- 3 manual heat settings
- Oxygen depletion sensor with auto shut-off
Who it's for
Suits a large garage, barn or open living area that needs propane heat without a chimney or electrical hookup. Not the right pick for a small bedroom, where 30,000 BTU is more heat than the space needs.
Pros and cons
- High 30,000 BTU output for large rooms
- No electricity required to run
- Base feet and wall bracket both included
- Push-button piezo ignition
- No thermostat, manual dial only
- Oversized for smaller rooms
- Blower sold separately
Performance notes
The blue flame burner heats air by convection rather than radiating directly like a tile-style heater, so it warms the whole room more evenly at the cost of a slower initial warm-up. With three manual settings and no thermostat, holding a target temperature in a 1,400 square foot space means adjusting the dial as conditions change rather than letting the unit self-regulate.
Specifications
| Brand | ProCom |
|---|---|
| Model | ML300HBA-B |
| Dimensions & fit | |
| Item Weight | 26 pounds |
| Item Dimensions D x W x H | 26 × 29 × 9 inches |
| Capacity & performance | |
| Heating Method | Convection |
| Heating Element | Radiant |
| Number of Speeds | 3 |
| Max Temperature Setting | 120 °F |
| Heating Coverage | 1400 sq. ft. |
| Power & efficiency | |
| Fuel Type | Propane |
| Power Source | Gas |
| Construction & materials | |
| Color | (___) |
| Compatibility & installation | |
| Mounting Type | Wall Mount |
| Included components | |
| Unit Count | 1 |
| Included Components | Feet, Heater, Wall mount bracket |
| Other details | |
| Indoor Outdoor Usage | Indoor |
| Form Factor | Pedestal |
| Room Type | Home Office, Living Room, Study Room |
| Number of Items | 1 |
| Recommended Uses For Product | Home, Office |
| Part Number | ML300HBA-B |
| Special Features | Adjustable Temperature, Low-Oxygen Safety Shutoff |
Frequently asked questions
Does the ProCom ML300HBA-B need to be vented outside?
No, it is a ventless design; the oxygen depletion sensor shuts the burner off automatically if indoor air quality drops too low.
What is the difference between this and a thermostat model?
This ProCom heater uses a manual low, medium and high dial rather than an automatic thermostat, which keeps the price lower.
Can it sit on the floor or mount to a wall?
Both; it includes base feet for floor placement and a bracket for wall mounting.