Mr. Heater MH4B Little Buddy 3800-BTU Indoor Safe Propane Heater with ODS & Tip-Over Protection
When the chill sets in, the Mr. Heater Little Buddy MH4B is like that friend who always brings the warmth—literally. Pumping out a cozy 3,800 BTU, it’s perfect for heating up spaces as big as 95 sq. ft., whether you’re crammed in a tent, chilling in a tiny room, or hosting an impromptu outdoor hangout.
And because we care about you not turning into a popsicle (or worse), it’s packed with safety smarts: an automatic low oxygen shut-off (because breathing is kind of important), a tip-over shut-off (for those "oops" moments), and some fancy patented cross-thread protection (no leaks here).
Got a 1-pound propane cylinder? Great—just don’t forget to bring one, because this little heater will keep you toasty for up to 5.6 hours without making a peep or stinking up the place. Quiet, clean, and odor-free? Yes, please.
Heads up, though: this isn’t your golf cart’s new best friend, and using sketchy accessories might just kiss your warranty goodbye. Just saying.
General specs
- Brand: Mr. Heater
- Model: F215100 MH4B
- Seller: Amazon
- BTU Output: 3,800 BTU per hour
- Coverage Area: Up to 95 sq. ft.
- Runtime: 5.6 hours at max BTU on a 1-pound cylinder (not included)
- Safety Features: Automatic low oxygen shut-off system (ODS), Tip-over safety shut-off, Cross-thread protection
- Usage: Indoor and outdoor use, Not for use with golf carts or motorized vehicles
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Shipping options
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Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Mr. Heater F215100 MH4B
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Mr. Heater F232000 Red
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Mr. Heater F299720 Multicolor
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Dura Heat TT-30CSA Silver
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Pro-Temp PT-125V-GFA-A Red/Black
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Outdoor Propane Patio Heater with Umbrella Dome 48,000 BTU
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| Brand | Mr. Heater | Mr. Heater | Mr. Heater | Dura Heat | Pro-Temp | MIXBIRLY |
| Model | F215100 MH4B | F232000 | F299720 | TT-30CSA | PT-125V-GFA-A | |
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| Rating |
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| Price | $68.02 | $75.91 | $143.35 | $57.90 | $164.99 | $149.95 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | May 13, 2025 | May 12, 2025 | May 13, 2025 | May 13, 2025 | May 13, 2025 | May 11, 2025 |
| Special Feature | Low-oxygen safety shut-off system | Low-Oxygen Safety Shutoff | Noiseless, Adjustable Tilt Head, Tip-Over Protection | Continuous electronic ignition, Adjustable heat angle, High-temperature limit shut-off, CSA certified | ||
| Form Factor | Pedestal | Cabinet | Dish | Mat | ||
| Indoor/Outdoor Usage | Indoor | Indoor | Outdoor | Outdoor | ||
| Product Dimensions | 7.7"D x 13.4"W x 15"H | 20.25"D x 9.25"W x 25.25"H | 7"D x 15"W x 17.75"H | 26"D x 15"W x 9"H | ||
| Mounting Type | Floor Mount | Wall Mount | Floor Mount | Floor Mount | ||
| Room Type | Living Room | Living Room, Bedroom | Home, Patio, Worksite, Camping | Living Room | ||
| Heating Coverage | 225 sq ft | 500 sq ft | 1000 sq ft | 125 square feet | ||
| Burner Type | Radiant | Radiant | Radiant | Radiant | ||
| Fuel Type | Propane | Liquid Propane | Propane | Propane | ||
Indoor Safe Propane Heater, 3800-BTU, Heating Area Up to 95 Sq. Ft
Reviews
Matthew Bianchi
March 27, 2025
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March 27, 2025
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March 27, 2025
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March 26, 2025
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March 26, 2025
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March 25, 2025