
Mr. Heater Buddy FLEX 11
- 11,000 BTU radiant propane heat
- 275 square feet heating coverage
- Indoor and outdoor use, with low-oxygen safety shutoff
- Tip-over protection built in
- 1 lb tank, or 20 lb with an optional hose
- 2 heat speeds, manual thermostat
- 11.7 pounds, 13.5 x 9 x 14.25 inches
- 3 year limited warranty
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A portable propane radiant heater for garages, patios, workshops and camping, with tip-over and low-oxygen safety shutoffs. It warms a small area and needs propane supplied separately.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B088ZXN7DHModel: MH11BFLEXCategory: Patio Heaters
Overview
A garage corner, a workshop bench or a patio seat is where the Mr. Heater Buddy FLEX makes sense: a portable radiant propane heater with an omni-directional fiber mesh burner. It stands on the floor or a tabletop and runs off a small propane tank, or a larger one through an optional hose.
Radiant heat from a burner built to resist wind makes it useful for fishing trips, camping and tailgating as well as a workshop. Two heat settings and the safety shutoffs cover the basics. Coverage suits a small room or zone, not a large open space, and the included components list the heater only.
Who it's for
Fishing trips, camping nights, tailgating and workshop corners are the situations the listing names, along with a patio or office space. Buyers who want hands-off whole-room heating, or who cannot store propane, should look at another heater type.
Pros and cons
- Radiant output with two heat speeds
- Tip-over protection and low-oxygen shutoff
- Works indoors and outdoors
- Floor or tabletop placement
- Heater only, propane tank not included
- Larger tank needs an optional hose
- Small coverage area only
- Manual thermostat control only
Performance notes
The fiber mesh burner radiates heat outward in all directions, so people and objects nearby warm up first. Output moves between the two speeds, and the wind resistant design helps outdoors. Coverage depends on the space, since open or drafty areas lose heat faster.
Where it stands among patio heaters
- #2 most-searched brand and model of the 5 patio heaters lines we track (by search demand, not sales).
From the specs of the 13 patio heaters we list; not a test result.
Specifications
| Brand | Mr. Heater |
|---|---|
| Model | MH11BFLEX |
| Dimensions & fit | |
| Dimensions (D x W x H) | 13.5 x 9 x 14.25 inches |
| Weight | 11.7 pounds |
| Capacity & performance | |
| Heat output | 11000 BTU |
| Heating coverage | 275 square feet |
| Heating Element | Radiant |
| Max temperature setting | 900 degrees F |
| Heat settings | 2 |
| Power & efficiency | |
| Fuel type | Propane |
| Construction & materials | |
| Color | Red |
| Compatibility & installation | |
| Mounting | Floor, tabletop |
| Included components | |
| Included Components | Heater |
| Warranty & support | |
| Warranty | 3 year limited |
| Other details | |
| Tank | 1 lb, or 20 lb with optional hose |
| Safety | Tip-over protection, low-oxygen safety shutoff |
| Use | Indoor, outdoor |
Frequently asked questions
Is the Mr. Heater Buddy FLEX an electric heater?
No. It is gas powered and burns propane. The listing names the heater as the only included component, so a tank is a separate purchase.
Can the Buddy FLEX be used indoors?
The listing says indoor and outdoor use, with tip-over protection and a low-oxygen safety shutoff. Follow the maker's instructions for placement and ventilation.
Can the Buddy FLEX run on a larger propane tank?
Yes. The description says it runs on a 1lb tank or can use a 20lb tank with an optional hose.