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Portable Buddy MH9BX
#3 in Space Heaters·View all 4

Portable Buddy MH9BX

Scored on 36 verified owner verdicts, from 46 comments read across 2 communities
TL;DR
Owners overwhelmingly praise the Buddy heater for how fast and forcefully it heats small spaces — tents, camper vans, and even 40ft motorhomes — with several saying it's been a reliable camping and hunting-shack companion for years. Many like that a hose adapter lets it run off a full 20lb propane tank for extended trips, while small canisters alone typically deliver 5-6 hours on low. A meaningful minority, though, report the built-in safety shutoff cutting the heater off unexpectedly, especially at higher altitudes or after short stretches of use, which some describe as the unit being finicky. Beyond that reliability quirk, complaints are scattered rather than consistent, with most owners calling it a solid, well-built value at its price point.

67% of 36 verified owners recommend the Portable Buddy MH9BX, based on real owner verdicts aggregated from Reddit, enthusiast forums, and YouTube.

What 36 owners say
46 comments reviewed · scored on the 36 clearest verdicts
67%
Recommend
24 owners
27%
Neutral
10 owners
6%
Don't recommend
2 owners
Source
Score
N
Counted in the score
Reddit
73%
22
Reviewed, but not counted — and why
Affiliate blogsipaid commission
100%
2
No clear verdictiSetup, tips & quirks
—
6

Affiliate blogs here say 100% recommend, while the owner-based score is 67%. They earn a commission on every sale — so we show them for transparency but never let them move the score.

The headline score reflects owners (Reddit, enthusiast forums), independent lab tests, blogs with no affiliate links, and YouTube owner-comments when they line up with owners. Affiliate blogs is shown for perspective but kept out here — hover the i for why.

What owners like
  • Puts out strong, fast heat — owners describe it warming a 12ft camper van, a 233S trailer, or a 40ft motorhome quickly, and keeping campers comfortable down into the 20s and 30s°F · 10 · 28%
  • Trusted for years of off-grid use in tent trailers, RVs, hunting shacks, and ice shacks — several owners say it's become a camping essential they won't go without · 7 · 19%
  • Hose adapter lets it run off a standard 20lb propane tank instead of small canisters, extending runtime to around 100 hours on low · 5 · 14%
  • Efficient on fuel — a single small green canister typically lasts about 5-6 hours on the low setting · 4 · 11%
  • Compact, well-built design that owners say is simple to use and worth the money · 3 · 8%
What owners flag
  • Safety auto-shutoff can trigger unexpectedly — some owners report the unit cutting out at higher altitudes or after roughly 30 minutes of use, describing the units as 'finicky' · 4 · 11%
Who it's for
A great fit if
  • Campers and tent-trailer users needing reliable heat down into the 20s-30s
  • RV/camper van owners heating small-to-medium interiors on the go
  • Hunters and ice-shack users wanting a dependable portable heat source
  • Off-grid or power-outage backup heating with an easy 20lb tank adapter
Look elsewhere if
  • Anyone needing sustained high-altitude use, since auto shutoff can trigger repeatedly
  • Garage or workshop use, where fumes and humidity build-up frustrated some owners
  • Users bothered by condensation and fogged windows from propane's water vapor

Synthesized from what Portable Buddy MH9BX owners say — not a spec sheet.

Top quotes, sourced

46 reviewed · 24 shown
Sentiment
Community
Sort
Reddit— neutral

“any of the Mr. Heater Buddy products can be finicky”

Reddit▼ don’t recommend

“I've definitely had it shut off at those altitudes.”

Reddit▲ recommend

“We have the small 9000 btu for or 12 foot camper van, and it's more than enough for us in the winter”

Reddit— neutral

“It actually heats very well but propane also gives off a lot of humidity so it fogs the windows too. Have to heat with the windows slightly open which is a bit counter productive.”

Reddit— neutral

“that is ok to go in a tent as long as you have enough room to not light your bedding on fire. I used it at Grant Village Campground at almost 8000 feet and it still ran”

Reddit▲ recommend

“The smaller Mr. Heater with the adapter for a 20lb tank is awesome”

Reddit▲ recommend

“It works pretty good. Enough for a small room.”

Reddit▲ recommend

“I'm a fan of these”

Reddit— neutral

“Got mine today. Looks like it was repacked and has some scuffs but it works.”

Reddit▲ recommend

“and I love it. Granted, it runs on a small propane tank, but its puts out great heat for a solid 3 hours before it needs to be replaced. I use it on my open-air deck.”

Reddit▲ recommend

“Used this setup in 20deg F camping with my two kids and wife. Heater can more than keep up.”

Reddit▲ recommend

“Love this guy, tip and oxygen sensor, indoor rated.”

Reddit— neutral

“It can just be finicky but overall it worked well.”

Reddit▲ recommend

“a Mr Heater Buddy propane heater works great.”

Reddit▲ recommend

“I got this little propane deal and love it.”

reThinkSurvival (affiliate)▲ recommend

“I thought it was worth the money and is yet another means to keep my family from freezing should the need arise.”

Reddit▲ recommend

“These are great! We used one for probably a decade in a tent trailer. It kept us toasty down to the 30's.”

YuenX (affiliate)▲ recommend

“Mr. Heater had become a luxury we would not go camping without when temperatures could dip as low as 28F!”

Reddit▲ recommend

“This mofo will bake you in a normal sized room.”

Reddit▲ recommend

“even at $100 it's a great little heater.”

Reddit▲ recommend

“its a sweet little heater”

Reddit▲ recommend

“The heater works well”

Reddit▲ recommend

“These work well if you don't want to bother with a custom install solution.”

Compare owner verdicts

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Common problems & things to know

Practical notes owners raise — setup, quirks, and issues to watch for. They don't say whether the person likes the product, so they're not counted in the score, but they inform the pros, cons, and who it's for.

Redditⓘ good to know

“Whether it's a problem with your internal wiring, or an external lack of power. I keep this inside my rig all winter incase of emergency. One of those green propane bottles last 4-5 hours, so keep a couple bottles inside. It's safe to run in the trailer.”

Redditⓘ good to know

“Thebpropane heater below claims to be for indoor use. I just bought one and haven't tested it out. Also get a CO alarm. Need adapter for a 20 gallon propane tank. And inline filter. Mr. Heater F232000 MH9BX Buddy 4,000-9,000-BTU Indoor-Safe Portable Propane Radiant Heater, Red-Black https://a.co/d/6Dnfb5x”

Redditⓘ good to know

“This is the one I've got. Mr. Heater F232025 MH9BX Buddy 4,000-9,000-BTU Portable Radiant Heater, California Only https://www.amazon.com/dp/B002QUZGS8/ref=cm_sw_r_apanp_A3XxlZybssv28”

Redditⓘ good to know

“This. Mr. Heater F232000 MH9BX Buddy 4,000-9,000-BTU Indoor-Safe Portable Propane Radiant Heater, Red-Black $74 on Amazon. A small green canister will last about 5 hours on low. You can run it off a larger one used for gas grills and such with an adapter hose.”

Redditⓘ good to know

“Mr. Heater F232000 MH9BX Buddy 4,000-9,000-BTU Indoor-Safe Portable Radiant Heater https://www.amazon.com/dp/B002G51BZU/ref=cm_sw_r_cp_apip_l3AxRC1yGOJWq I have the hose attachment to hook it up to a 20lb tank but I just haven’t yet needed to as I have a stock of little green bottles to use up.”

Redditⓘ good to know

“You can a get an adapter for the 20 pound tanks. They run this in low for 100 hours.”