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
- ID: B001CFRF7I
- 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
- First listed by seller: 3/24/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Price History for seller Amazon
Shipping options
Russia
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Mr. Heater F215100 MH4B
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Mr. Heater F232050
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Mr. Heater F232000 Red
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Mr. Heater MH540T Silver Adjustable Temperature
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Mr. Heater F242010 Multicolor 4,000 BTU radiant heat for up to 5.5 hours
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Heat Hog HH-09SLN-A
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| Brand | Mr. Heater | Mr. Heater | Mr. Heater | Mr. Heater | Mr. Heater | Heat Hog |
| Model | F215100 MH4B | F232050 | F232000 | MH540T | F242010 | HH-09SLN-A |
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| Price | $65.99 | $89.00 | $89.00 | $91.99 | $79.99 | $109.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | November 20, 2025 | November 20, 2025 | November 20, 2025 | November 20, 2025 | November 20, 2025 | November 20, 2025 |
| Special Feature | Low-oxygen safety shut-off system | Adjustable Temperature, Noiseless, Adjustable Tilt Head, Tip-Over Protection | Golf Cart Heater | |||
| Form Factor | Pedestal | Tank Top | Cabinet | |||
| Indoor/Outdoor Usage | Indoor | Outdoor | Outdoor | |||
| Product Dimensions | 7.7"D x 13.4"W x 15"H | 10.4"D x 10.4"W x 17.5"H | 9.4"D x 7.7"W x 9.4"H | |||
| Recommended Uses For Product | Office, Garage, Outdoor, Desk, Indoor | Outdoor | Garden | |||
| Mounting Type | Floor Mount | Floor Mount, Wall Mount | Deck Mount | |||
| Room Type | Living Room | Outside | Patio | |||
| Heating Coverage | 225 sq ft | 100 square feet | 100 | |||
| Burner Type | Radiant | Radiant | Radiant | |||
| Fuel Type | Propane | Propane | Propane | |||
| Item Weight | 9 pounds | 5.5 pounds | 6 pounds | |||
| Country of Origin | China | China | China | |||
| Warranty Description | 1-Year Limited Warranty | 1 Year Limited Warranty | 1 Year Limited | |||
| Included Components | Portable Buddy Heater, Piezo Igniter | Complete heater | Heater | |||