Staying warm outdoors isn’t just about comfort it’s about safety, focus, and function. Whether you’re deep in the woods on a hunting trip, working in an unheated space, or just trying to enjoy your patio in the fall, a reliable portable gas heater can make all the difference. Mr. Heater is a household name in propane-powered heating, offering a diverse lineup tailored for every kind of outdoor need.
In this guide, we break down 10 of the best Mr. Heater portable gas heaters, giving you an easy way to compare features, fuel types, heat output, and user-friendly functions. Whether you’re looking for compact portability, dual-purpose cooking heaters, or high-powered worksite units, you’ll find what you need here.
Quick Recommendations
- Best for Tents or Small Indoor Spaces: MH4B Little Buddy
- Best All-Around Portable Heater: MH9BX Buddy
- Best for Hunting or Ice Fishing: MH12B Hunting Buddy
- Best for Large Spaces: MH18B Big Buddy
- Best for Off-Grid or Mobile Use: MH9BXRV BuddyFlex
- Best for Outdoor Job Sites: MH30TS Double Tank Top (Spark Ignition)
- Best Budget Tank-Top Option: MH15T Single Tank Top
- Best Cooking + Heating Combo: MH15C Cooker/Hunting Heater
- Best for Extended Runtime: MH18BRV Big Buddy with Fan
- Best Heavy-Duty Match-Lit Model: MH30T Double Tank Top (Manual)
Best Mr. Heater Portable Gas Heaters for Outdoor Reviews:
Mr. Heater F232000 MH9BX Portable Buddy Heater (4,000–9,000 BTU)
A favorite among outdoor enthusiasts, the Mr. Heater Portable Buddy brings warmth where you need it most. Designed for both indoor and outdoor use, this compact propane heater radiates powerful heat across spaces up to 225 sq. ft., making it a trusted companion for camping trips, workshops, or chilly patios. Its combination of reliability, portability, and safety features makes it a standout in the world of portable gas heaters for outdoor settings.
Key Features
- Adjustable heat output: 4,000 to 9,000 BTU
- Indoor-safe propane heater with low-oxygen shut-off and tip-over protection
- Heats up to 225 sq. ft.
- Reliable piezo ignition system—no matches required
- Compatible with 1 lb. cylinders and 20 lb. tanks (with optional hose)
- Fold-down handle for compact storage and portability
What We Like
- Highly portable design with a sturdy, ergonomic handle
- Efficient heating—warms spaces quickly and effectively
- Trusted safety features for peace of mind
- Great fuel economy on both high and low settings
- Easy setup with intuitive controls
- Durable construction built to withstand outdoor conditions
What We Don’t Like
- On the low setting, the flame can sometimes be a bit unstable
- Run time is limited when using a small 1 lb. cylinder
Overall
The Mr. Heater MH9BX Portable Buddy stands out as a dependable, efficient, and well-designed portable gas heater for outdoor use. Its quick heat output, safety features, and compact design make it a solid choice for campers, DIYers, or anyone needing reliable heat on the go. The minor downsides are far outweighed by its consistent performance and versatility.
Mr. Heater F215100 MH4B Little Buddy 3,800-BTU
Compact, simple, and surprisingly effective, the Little Buddy heater is a go-to heating solution for campers, van lifers, and anyone needing a quick blast of warmth in small, enclosed areas. Designed to cover up to 95 sq. ft., it delivers clean, quiet radiant heat with just a 1 lb propane cylinder. Whether you’re sitting in a deer blind, riding out a chilly night in your tent, or prepping for emergencies at home, the Little Buddy offers dependable performance in a lightweight form.
Key Features
- 3,800 BTU radiant heat output
- Heats up to 95 sq. ft. of space
- Oxygen Depletion Sensor (ODS) for indoor safety
- Automatic tip-over shut-off
- Simple on/off push-button ignition
- Runs up to 5.6 hours on one 1 lb propane tank
- Operates up to 7,000 ft altitude
What We Like
- Compact and portable—ideal for camping and tight indoor spaces
- Very easy to operate with no complex controls
- Reliable safety features, including tip-over and low oxygen shut-offs
- Clean and odor-free burning
- Decent runtime for its size and fuel consumption
- Great for emergency heat in power outages
What We Don’t Like
- Limited heat coverage—best suited for small, enclosed spaces
- Flame points upward, which may not warm feet or lower areas efficiently
Overall
The Mr. Heater Little Buddy may be small, but it punches well above its weight for heating efficiency and ease of use. It’s not built for heating large areas, but for solo camping, ice fishing, or emergency indoor use, it performs exactly as promised. Safe, dependable, and travel-friendly, it’s a smart pick for anyone looking for a no-fuss portable gas heater for outdoor or indoor situations.
Mr. Heater MH12B Hunting Buddy 6,000–12,000 BTU Portable Propane Heater
Designed with hunters, campers, and off-grid adventurers in mind, the Mr. Heater Hunting Buddy is a tough, no-nonsense heating solution built to handle unpredictable outdoor conditions. With dual heat settings ranging from 6,000 to 12,000 BTUs, it efficiently warms spaces up to 300 sq. ft.—perfect for blinds, ice shanties, or uninsulated garages. Whether you’re prepping for a cold-weather hunt or simply enjoying time outside when temperatures drop, this heater delivers consistent radiant heat you can rely on.
Key Features
- Adjustable heat output: 6,000 or 12,000 BTU
- Heats up to 300 sq. ft. of space
- Safe for indoor use with low-oxygen shutoff and tip-over protection
- Piezo ignition for quick, match-free starts
- Compatible with 1 lb propane tanks or a 20 lb tank using optional hose
- Durable ceramic burner with swivel regulator for flexible connection options
What We Like
- Strong heat output makes it ideal for mid-sized outdoor spaces
- Excellent safety mechanisms, including ODS and tip-over shutoff
- Straightforward operation—simple knob and push-button ignition
- Rugged design holds up well in the field
- Versatile fuel options for extended run time with larger tanks
What We Don’t Like
- Lacks a built-in fan, so heat doesn’t circulate as broadly
- A bit bulky compared to smaller models
Overall
The Mr. Heater MH12B Hunting Buddy offers an ideal balance between portability and power. Its dual heat settings, ease of use, and trusted safety features make it a dependable companion in colder outdoor environments. While it’s not the most compact model in the lineup, its performance more than makes up for the size, especially when paired with a larger tank for extended warmth. For anyone spending long hours in the cold, this heater earns its place in the gear bag.
Mr. Heater MH18B Big Buddy 4,000–18,000 BTU Portable Propane Heater
Built for serious warmth in larger spaces, the Big Buddy Heater delivers rugged performance for campers, hunters, and those needing reliable heat in garages, workshops, or cabins. With adjustable settings from 4,000 to 18,000 BTUs, it efficiently covers up to 450 sq. ft., combining radiant and convection heat for even distribution. Whether you’re weathering a winter storm or simply enjoying the outdoors in colder months, this heater offers a blend of high power, safety, and convenience in a compact footprint.
Key Features
- Adjustable heat settings: 4,000, 9,000, and 18,000 BTU
- Heats areas up to 450 sq. ft.
- Indoor-safe with tip-over shutoff and Oxygen Depletion Sensor
- Runs on two 1 lb. propane cylinders or connects to a 20 lb. tank with adapter
- Piezo ignition for quick, match-free lighting
- Optional fan (battery or AC powered) enhances heat circulation
- Durable build with dual ceramic burners and swivel regulators
What We Like
- Excellent heat output—ideal for large spaces or colder climates
- Safe for indoor use, with built-in safety shutoffs
- Versatile fuel options for short- or long-term use
- Easy to light and adjust with intuitive controls
- Long runtime on low setting with two small tanks
- Sturdy and reliable for heavy outdoor use
What We Don’t Like
- Built-in fan may be weak without AC adapter
- Bulky for travel compared to smaller models
Overall
The Mr. Heater Big Buddy lives up to its name, offering dependable, powerful heating for outdoor enthusiasts and home use alike. While it’s not the most portable option in the lineup, its heating capacity, safety features, and flexible fuel setup make it a top pick for those who need serious heat in serious conditions. For anyone facing winter head-on, this is a heater you can count on.
Mr. Heater MH540T 45,000 BTU Radiant Tank Top Propane Heater
When serious outdoor warmth is the goal, the MH540T gets the job done. This rugged tank-top heater cranks out up to 45,000 BTUs of radiant heat, making it ideal for wide-open spaces like campsites, patios, garages, and tailgate setups. Designed to mount directly on a standard 20 lb. propane tank, it offers a 540-degree heating radius and three powerful settings. Built tough with a swivel bracket and polished reflector, it’s a go-to option for those who spend their winters outdoors or want a compact, high-performance heating solution.
Key Features
- Up to 45,000 BTU output with three heat settings (30K, 36K, 45K)
- Radiant burner with 540° wide heat coverage
- 180° adjustable swivel head for targeted warmth
- Push-button ignition and match-lit backup
- Secure POL connection to standard LP tanks
- Tip-over safety shut-off for peace of mind
- Durable stainless steel build designed for outdoor use
What We Like
- High heat output—easily warms large open-air areas
- Simple setup—connects directly to a propane tank
- Adjustable head lets you aim heat where it’s needed
- Reliable ignition and manual backup adds versatility
- Well-built design that holds up in harsh conditions
What We Don’t Like
- Consumes fuel quickly on high setting
- Not ideal for enclosed spaces (outdoor use only)
Overall
The Mr. Heater MH540T delivers uncompromising heat in a compact, easy-to-use design. Whether you’re working on winter projects in the garage or hosting a chilly evening gathering outdoors, this heater provides fast, focused warmth. It’s not made for indoor use, and it’ll burn through propane at full throttle—but for those who need serious heat outside, it’s hard to beat.
Mr. Heater MH30T Double Tank Top Outdoor Propane Heater – 30,000 to 45,000 BTU
Built for the toughest winter jobs, the Mr. Heater MH30T is a high-powered, dual-burner tank-top heater that’s perfect for wide open outdoor spaces like campsites, job sites, and hunting grounds. Mounting directly to a 20 lb. propane cylinder, it delivers a powerful punch of radiant heat with adjustable output ranging from 30,000 to 45,000 BTUs. Designed for people who don’t stop working or adventuring just because the temperature drops, this heater gets the job done—fast and efficiently.
Key Features
- Adjustable heat output: 30,000 / 36,000 / 45,000 BTU
- Dual burner heads with independent controls
- Direct tank-mount design for standard 20 lb. propane cylinders
- 180° multi-directional head for flexible heat targeting
- High-efficiency radiant heat coverage
- Built-in tip-over safety shut-off
- Heavy-duty construction for rugged outdoor use
What We Like
- Extremely powerful heat output—ideal for larger, open spaces
- Simple setup—connects directly to propane tank, no tools needed
- Dual burners offer flexibility in heat control and direction
- Reliable safety shutoff helps prevent accidents
- Solid, weather-resistant build made for harsh conditions
What We Don’t Like
- Not suited for indoor use, even in garages
- Consumes propane quickly at full output
Overall
If you’re looking for a no-nonsense, heavy-duty portable gas heater for outdoor use, the MH30T is a top-tier option. It’s made to perform in the coldest conditions with minimal hassle—no cords, no setup delays, just instant, powerful heat. While it’s not for indoor environments, its performance outside is unmatched. Whether you’re working through winter or enjoying late-season hunting or tailgating, this heater keeps the chill at bay without breaking a sweat.
Mr. Heater MH15T Single Tank Top Outdoor Propane Heater – 10,000 to 15,000 BTU
Designed for on-the-go heat in wide-open spaces, the MH15T offers no-fuss operation and solid performance. With adjustable output between 10,000 and 15,000 BTUs, this radiant tank-top heater connects directly to a 20 lb. propane cylinder, making it a practical choice for campsites, workshops, patios, and outdoor job sites. It’s a simple yet effective heating tool for those who want powerful heat without the complexity.
Key Features
- Variable heat settings: 10,000, 12,000, or 15,000 BTUs
- Radiant heating for efficient warmth
- Attaches directly to standard 20 lb. propane tank
- Adjustable swivel head for directional heating
- No electricity required—ideal for off-grid use
- Built-in safety shutoff for tip-over protection
- Durable chrome and stainless steel construction
What We Like
- Quick and easy setup—no tools or assembly required
- Reliable heat output with adjustable control
- Sturdy design that holds up well outdoors
- No cords or batteries needed—fully gas-powered
- Lightweight and portable for travel or job site use
What We Don’t Like
- Not designed for indoor use
- Wind can impact flame in open environments
Overall
The Mr. Heater MH15T is a dependable single-burner heater for anyone who needs straightforward heat outdoors. Its simplicity, portability, and solid build make it a go-to for quick warmth at campsites, tailgates, or chilly outdoor projects. While it lacks the features of larger models, it delivers where it counts: consistent heat without hassle.
Mr. Heater MH9BXRV BuddyFlex Radiant Heater – 4,500 to 11,000 BTU
When portability meets precision, the BuddyFlex steps in. Designed to provide dependable radiant heat in tough outdoor conditions, this compact propane heater delivers adjustable warmth from 4,500 to 11,000 BTUs. Whether you’re camping in the backcountry, tailgating in winter, or managing a work site in cold weather, the BuddyFlex offers safe, clean heat in a rugged build that’s easy to carry and even easier to use.
Key Features
- Variable heat output from 4,500 to 11,000 BTUs
- Heats areas up to 275 sq. ft.
- Radiant burner design with quiet operation
- Integrated gas-powered fan for better heat distribution
- Built-in safety shutoffs: tip-over and low oxygen
- Swivel regulator for easy hose attachment
- Compatible with 1 lb. propane cylinders or 20 lb. tanks (with hose)
- Electric ignition—no matches needed
What We Like
- Smooth, even heat output with optional fan circulation
- Safe for enclosed areas thanks to built-in sensors
- User-friendly controls and fast ignition
- Compact and easy to carry, perfect for field use
- Great runtime on a single small tank
What We Don’t Like
- Fan requires separate power source (not propane-powered)
- Limited to small- to mid-sized spaces
Overall
The BuddyFlex delivers what most portable gas heaters only promise—efficient, adjustable heat with safety and control built in. Its rugged form factor and well-thought-out features make it a solid choice for outdoor adventurers, mobile workers, and anyone in need of flexible warmth. While the fan isn’t self-powered, it’s a minor trade-off for the comfort and reliability this heater brings to colder environments.
Mr. Heater F242300 MH15C Cooker/Hunting Heater – 10,000 to 15,000 BTU
Perfect for the dual demands of heat and cooking, the Mr. Heater MH15C is a rugged and efficient propane heater built with outdoorsmen in mind. Whether you’re warming up a deer blind or boiling a pot of coffee at camp, this unit attaches directly to a 20 lb. tank and delivers clean, adjustable heat. Its compact design, simple operation, and versatility make it a favorite for cold-season hunters, campers, and tailgaters looking for reliable performance in the field.
Key Features
- Variable heat output: 10,000, 12,500, and 15,000 BTU
- Multi-functional use: space heating or outdoor cooking
- Mounts directly to a 20 lb. propane cylinder
- Durable steel construction with chrome-plated reflector
- Adjustable swivel burner head for directional heating
- Integrated safety shut-off for tip-over protection
- Match-lit ignition—no electricity required
What We Like
- Dual-purpose design works as both heater and cooker
- Simple and sturdy—great for backwoods or off-grid use
- Fast heat delivery in small-to-medium outdoor areas
- Swivel head adds control over heat direction
- No power needed, ideal for emergency or remote scenarios
What We Don’t Like
- No built-in fan or thermostat for heat regulation
- Match ignition only—may be tricky in windy conditions
Overall
The Mr. Heater MH15C strikes a smart balance between functionality and portability. It’s not just a heater—it’s a versatile camp tool ready for cold mornings and hot meals. While it lacks some modern extras like auto ignition or fan assistance, its reliability, power, and ease of use more than make up for it. For anyone looking to stay warm and cook outdoors in colder weather, this model is a solid, time-tested choice.
Mr. Heater MH30TS Double Tank Top Heater with Spark Ignition – 30,000 to 45,000 BTU
For serious outdoor heat in the coldest conditions, the Mr. Heater MH30TS brings durable performance and instant warmth. This double burner propane heater mounts directly onto a standard 20 lb. cylinder and delivers up to 45,000 BTUs of radiant heat. Whether you’re working outside, tailgating, or staying warm at camp, it offers strong, reliable performance with easy-to-use controls and spark ignition for quick startups—even in freezing weather.
Key Features
- Heat output: 30,000 / 36,000 / 45,000 BTU settings
- Dual burners with adjustable individual controls
- Attaches directly to 20 lb. propane tank
- Built-in push-button spark ignition—no matches needed
- 180° adjustable swivel head for directional heating
- Radiant heating for efficient outdoor warmth
- Automatic tip-over shut-off for added safety
- Heavy-duty steel frame built for rough outdoor use
What We Like
- High BTU capacity for heating wide open outdoor areas
- Reliable spark ignition makes cold starts easy
- Dual burners offer flexibility for heat output and direction
- Sturdy and weather-resistant construction
- Simple, tool-free setup with direct tank connection
What We Don’t Like
- Not intended for indoor use
- Propane consumption is high at max setting
Overall
The Mr. Heater MH30TS is built for those who demand serious heat without complications. With powerful performance, dual burner control, and no need for electricity, it’s perfect for outdoor work zones, camp setups, and winter events. While it’s strictly an outdoor unit and will run through propane quickly at full blast, its sheer heating ability makes it an essential for anyone who won’t let cold weather slow them down.
Comparison Chart – Mr. Heater Portable Gas Heaters
| Product Name | BTU Range | Heating Area | Ignition Type | Fuel Type | Best For | Standout Feature |
|---|---|---|---|---|---|---|
| MH9BX Buddy | 4,000–9,000 | Up to 225 sq. ft. | Piezo Ignition | 1 lb / 20 lb Propane | Camping, backup heating | Compact, indoor-safe |
| MH4B Little Buddy | 3,800 | Up to 95 sq. ft. | Push-button Ignition | 1 lb Propane | Small tents, blinds | Ultra-portable, indoor-safe |
| MH12B Hunting Buddy | 6,000–12,000 | Up to 300 sq. ft. | Piezo Ignition | 1 lb / 20 lb Propane | Hunting, ice fishing | Swivel regulator, dual heat modes |
| MH18B Big Buddy | 4,000–18,000 | Up to 450 sq. ft. | Piezo Ignition | 1 lb / 20 lb Propane | Large tents, garages | Built-in fan, dual ceramic burners |
| MH18BRV Big Buddy (Fan) | 4,000–18,000 | Up to 450 sq. ft. | Electric Ignition | 1 lb / 20 lb Propane | Extended outdoor use | Integrated fan and regulator |
| MH15T Single Tank Top | 10,000–15,000 | Small to medium | Match-light Ignition | 20 lb Propane | Outdoor work zones | Swivel head, simple setup |
| MH30T Double Tank Top (Match-lit) | 30,000–45,000 | Large open areas | Match-light Ignition | 20 lb Propane | Job sites, campsites | Dual burners, no electricity needed |
| MH30TS Double Tank Top (Spark Ignition) | 30,000–45,000 | Large open areas | Spark Ignition | 20 lb Propane | Extreme cold, tailgates | Push-button ignition |
| MH9BXRV BuddyFlex | 4,500–11,000 | Up to 275 sq. ft. | Electric Ignition | 1 lb / 20 lb Propane | Portable off-grid use | Radiant heat with optional fan |
| MH15C Cooker/Hunting Heater | 10,000–15,000 | Small to medium | Match-light Ignition | 20 lb Propane | Cooking + heating combo | Dual-use heater and cooker |
Things to Consider Before Buying a Portable Gas Heater
1. BTU Output
Measured in BTUs (British Thermal Units), the heat output directly affects how much space the heater can warm. Small units around 3,800–9,000 BTUs are best for personal or tent use, while 18,000+ BTU models can handle large garages or outdoor worksites.
2. Heating Area
Each heater is rated for a certain square footage. Choose based on the size of the area you want to heat, factoring in insulation and ventilation.
3. Ignition Method
- Piezo or Electric Ignition: Easier to use in cold or windy conditions
- Match-light: Reliable but less convenient, especially with gloves or bad weather
- Spark Ignition: Push-button activation without needing matches
4. Portability
Models like the Buddy series are highly portable, while tank-top heaters are more stationary but deliver more heat.
5. Fuel Compatibility
Most units work with 1 lb. or 20 lb. propane tanks. Look for compatibility with larger tanks if you plan to run the heater for long periods.
6. Safety Features
Tip-over protection and oxygen depletion sensors (ODS) are essential for indoor or semi-enclosed spaces. Always verify safety ratings and certifications.
FAQs
Yes—but only specific models such as the Buddy, Little Buddy, and Hunting Buddy are rated indoor-safe. Always ensure proper ventilation and follow the manufacturer’s guidelines.
Not always. Fans help circulate heat more efficiently, but radiant heaters warm objects directly and don’t require air movement to function.
Depending on the BTU output, 1 lb. tanks typically last 4–6 hours on low settings.
Only models like the MH15C are rated for cooking. Never cook on units not specifically designed for it.
Both are match-free systems. Piezo uses a manual clicker, while spark ignition involves an integrated electric spark from a push-button.
Key Takeaways
- Choose your heater based on space size and mobility needs.
- The Buddy series offers the most user-friendly features for campers and general users.
- Tank-top models excel at high output but are not indoor-safe.
- Always prioritize safety features, especially in enclosed or semi-enclosed areas.
- Consider how long you’ll need heat and choose tank compatibility accordingly.
Conclusion
From compact tent-safe heaters to full-powered worksite warmers, Mr. Heater has created one of the most versatile and trusted lineups of portable gas heaters available. Each model serves a distinct purpose, whether it’s mobility, high-output performance, or cooking functionality. With the right heater, your outdoor experience becomes safer, more comfortable, and a lot more enjoyable—no matter how low the temperature drops.
Take time to match your specific needs with the right features, and use this guide as your shortcut to buying with confidence.
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