Mr. Heater Original 540-Degree 45
- 30,000 to 45,000 BTU, propane
- Mounts on a 20 lb tank
- Up to 9.5 hours on high
- 360 degree burner head, swivels another 180 degrees
- Tip-over safety shut-off
- Three settings: high, medium, low
- 5.6 pounds
- 1 year limited warranty
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A tank-top radiant propane heater for job sites, campsites and tailgates with a tip-over shut-off. Output is given as a range, and it is for outdoor use.
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ASIN: B01BE8FVUKModel: MH540TCategory: Patio Heaters
Overview
A tailgater, camper or job-site worker gets a radiant propane heater that mounts directly on a standard tank. The burner head swivels for all-around warmth, and the regulator adjusts output.
A swiveling head spreads heat in several directions, and quiet operation with a push button valve suits close quarters. The listing gives a BTU range and a coverage figure with no unit, so check output against your space.
Who it's for
Outdoor workers and campers who want portable radiant warmth from a standard tank. Anyone heating an enclosed room needs a heater rated for indoor use.
Pros and cons
- Mounts directly to a tank
- Tip-over safety shut-off
- Swivels for all-around heat
- Three heat settings
- BTU shown as a range
- Outdoor use only
- Tank not included
Performance notes
Propane feeds a radiant burner whose head swivels, and the regulator sets high, medium or low output. A tip-over shut-off stops the flame if the unit falls. Run time depends on the setting, with the longest figure given for high.
Where it stands among patio heaters
- #4 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 | MH540T |
| Dimensions & fit | |
| Dimensions (D x W x H) | 10.4 x 10.4 x 17.5 inches |
| Weight | 5.6 pounds |
| Capacity & performance | |
| Heat output | 30,000 to 45,000 BTU |
| Heating method | Radiant |
| Heat settings | 3 (high, medium, low) |
| Power & efficiency | |
| Fuel type | Propane |
| Compatibility & installation | |
| Tank mount | Directly to a 20 lb propane tank |
| Mounting | Floor or wall |
| Warranty & support | |
| Warranty | 1 year limited |
| Other details | |
| Run time on high | Up to 9.5 hours |
| Use | Outdoor |
Frequently asked questions
How do I mount the Mr. Heater MH540T?
The description says it mounts directly to a 20 lb propane tank and features a soft nose P.O.L. connection and a push button thermo-electric valve.
Does the Mr. Heater MH540T include a propane tank?
The included components list the heater only. The tank is not itemized.
Can the Mr. Heater MH540T be used indoors?
The listing gives its use as outdoor. Indoor use is not described.