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The Buddy FLEX is Mr. Heater’s outdoor-focused entry in the Buddy lineup, built with an omni-directional burner that spreads heat 360 degrees rather than in one fixed direction like the classic Portable Buddy. It’s explicitly rated for both indoor and outdoor use, but its wind-resistant burner shield and pilot protection are aimed squarely at outdoor conditions: a patio, a tailgate, a campsite, or a job site where a gust of wind would snuff out a less protected flame. At 11,000 BTU, it slots between the Portable Buddy and Big Buddy in output.
Top 3 Recommended
Who It’s For
This heater fits outdoor entertaining spaces up to about 275 sq ft: a patio, a tailgate setup, a campsite common area, or a backyard gathering. Its 360-degree burner design makes it a better fit than a directional heater for a group sitting around it rather than facing one direction. It’s also a reasonable pick for a job site that needs portable heat outdoors during a break. It’s not the ideal choice for a small tent, where the Little Buddy’s lighter weight and lower fuel burn make more sense.
Full Specs
| Spec | Detail |
|---|---|
| BTU output | 8,000-11,000 BTU |
| Coverage | Up to 275 sq ft |
| Fuel | One 1 lb. cylinder (minimum) |
| Runtime | 2 hours on High, 3.5 hours on Low |
| Dimensions | 13.5"L x 9"W x 14.25"H |
| Weight | 11.02 lbs |
| Safety | Oxygen depletion sensor, Apex 50° tip-switch, patented thermal shut-down system |
| Ignition | Electronic, 360° omni-directional burner |
| Max elevation | 7,000 ft |
Source: Mr. Heater official Buddy FLEX product page.
What Owners Praise
The 360-degree burner is the standout feature in aggregated owner feedback. Unlike the classic directional Buddy design, this one spreads heat evenly around a group, which owners repeatedly describe as a real improvement for outdoor gatherings where people sit on multiple sides of the heater. The wind protection built into the burner shield also draws consistent praise. Owners running it at tailgates and campsites report it staying lit in conditions that owners say would snuff out a less-protected flame. The electronic ignition is another point of praise, with several owners noting it starts more reliably in cold, damp outdoor conditions than a basic piezo spark.
What Owners Report as Drawbacks
The most common complaint is runtime at the High setting. At 2 hours per 1 lb. cylinder, an evening tailgate or long outdoor gathering means packing several cylinders or using it mostly on Low. A second theme is that some owners expected it to double as a cooking accessory, since Mr. Heater also sells a Buddy FLEX cooker attachment separately. That accessory is not included with the heater itself, and a portion of confused reviews stem from not realizing that upfront. A smaller number of owners in very cold outdoor conditions report needing to shield the unit further with a windbreak for best performance, even with its built-in wind protection.
Pros & Cons
Pros
- 360-degree burner spreads heat evenly around a group
- Wind-resistant burner shield genuinely helps in outdoor conditions
- Electronic ignition starts reliably in cold, damp weather
- Rated for both indoor and outdoor use, unlike some outdoor-only heaters
Cons
- Only 2 hours of runtime per cylinder at the High setting
- The cooker attachment is sold separately, not included
- Very cold, exposed conditions may still call for an added windbreak
- 11,000 BTU ceiling means a larger open patio needs a full-size patio heater instead
Maintenance and Storage
Keep the omni-directional burner clear of dust and debris, since its design has more surface area than a simple directional burner. Check the tip-switch and thermal shut-down system at the start of each season. Store the heater with any cylinder removed, somewhere dry and out of direct weather exposure between uses. If you use it regularly outdoors, wipe down the wind-shield housing periodically to keep it functioning as designed.
How It Compares
Against the classic directional Portable Buddy reviewed in our Mr. Heater Portable Buddy review, the Buddy FLEX trades a slightly higher BTU ceiling and directional focus for 360-degree coverage and better wind resistance. That makes it the better pick for an outdoor group sitting around it, while the classic Portable Buddy remains a solid, lighter choice for a tent or a single-direction heat need.
Placement and Safety Notes
Set the Buddy FLEX on a flat, stable surface, away from anything flammable that could blow toward the burner shield in a gust of wind. Keep the manufacturer’s minimum clearance distance from tents, tarps, and outdoor furniture. Even though it’s rated for both indoor and outdoor use, follow the ventilation guidance in the manual for whichever setting you use it in, since it still burns propane and produces carbon monoxide as a byproduct either way.
Cost to Run
At the 11,000 BTU High setting, a single 1 lb. cylinder lasts about 2 hours, which works out to roughly the same per-hour propane cost as the smaller Buddy models in this lineup. For an evening tailgate or a multi-hour outdoor gathering, budgeting two or three spare cylinders keeps the heater running without an unplanned mid-event fuel change. Running mostly on the Low setting and reserving High for the coldest stretches of the evening stretches a small supply of cylinders further.
Verdict
For outdoor entertaining, tailgating, or campsite use where a group needs even heat from multiple sides, the Buddy FLEX’s 360-degree burner and wind-resistant design deliver on what its outdoor-focused marketing promises. Anyone who mainly needs directional heat in a tent should stick with the classic Portable Buddy instead. For genuinely outdoor group use, this is one of the more thoughtfully designed options in the Buddy lineup.
Best for Outdoor patios, tailgates and campsites up to 275 sq ft
Related Products
See our full Mr. Heater Buddy series guide for how the Buddy FLEX compares to the rest of the lineup, or our propane heater for patio picks for other outdoor options. Pair it with these:
