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Mr. Heater, PORTABLE BUDDY HEATER, Heat Type Radiant, Heat Output 9000 Btu/hour, Heating Capability 225 ft², Model# MH9BX

Item# 173690
15 of 656 reviewers received a sample product or took part in a promotion
Top Seller
Mr. Heater, PORTABLE BUDDY HEATER, Heat Type Radiant, Heat Output 9000 Btu/hour, Heating Capability 225 ft², Model# MH9BX

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Mr. Heater, PORTABLE BUDDY HEATER, Heat Type Radiant, Heat Output 9000 Btu/hour, Heating Capability 225 ft², Model# MH9BX

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$99.99

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  • Powerful 9,000 Btu Radiant Heat: Choose between 4,000 and 9,000 BTU heat settings to deliver comfortable radiant warmth to spaces up to 225 sq. ft., providing versatile heating for a wide range of indoor and outdoor applications.
  • Lightweight & Portable: Designed for convenient transport, the Portable Buddy features a lightweight construction and fold-down handle that makes it easy to carry between locations and compact enough for convenient storage.
  • Lightweight & Portable: Designed for convenient transport, the Portable Buddy features a lightweight construction and fold-down handle that makes it easy to carry between locations and compact enough for convenient storage.
  • Flexible Propane Fuel Options: Operates with either a 1-lb. propane cylinder or 20-lb. propane tank, giving you flexibility to choose the fuel source that works best for your application. Propane tanks and cylinders are not included.
  • Extended Heating Runtime: Get approximately 3 to 6 hours of heat from a 1-lb. propane cylinder or 48 to 110 hours when connected to a 20-lb. propane tank, depending on the selected heat setting.

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Complete Your Solution

  • Mr. Heater, PORTABLE BUDDY HEATER, Heat Type Radiant, Heat Output 9000 Btu/hour, Heating Capability 225 ft², Model# MH9BX
  • Mr. Heater Extension Hose for Propane Heater, 15ft. Length, Model# F271470
  • Mr. Heater Fuel Filter for Buddy Heaters, Model# F273699
  • Mr. Heater Hose Connection For Buddy Heater Item# 173690, 5ft. Length, Model# F273701
Price for all four:

$187.96

Frequently Bought Together

  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Accessories

  • Warranty

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Product Summary

Take dependable warmth wherever you need it with the Mr. Heater Portable Buddy Propane Heater. Producing 4,000 or 9,000 BTU per hour, this compact radiant heater warms areas up to 225 sq. ft. and is ideal for tents, campers, RVs, hunting, fishing, workshops, garages, cabins, and more. Its lightweight design and fold-down handle make it easy to carry and store, while flexible propane connections accommodate a 1-lb. cylinder or a 20-lb. tank with the appropriate hose. Built-in low-oxygen and tip-over shutoff systems add an extra layer of safety during operation.

What's Included

    (1) Mr. Heater Portable Buddy Propane Heater, Model# MH9BX

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Product Manual
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Features + Benefits

  • Powerful 9,000 Btu Radiant Heat: Choose between 4,000 and 9,000 BTU heat settings to deliver comfortable radiant warmth to spaces up to 225 sq. ft., providing versatile heating for a wide range of indoor and outdoor applications.
  • Lightweight & Portable: Designed for convenient transport, the Portable Buddy features a lightweight construction and fold-down handle that makes it easy to carry between locations and compact enough for convenient storage.
  • Lightweight & Portable: Designed for convenient transport, the Portable Buddy features a lightweight construction and fold-down handle that makes it easy to carry between locations and compact enough for convenient storage.
  • Flexible Propane Fuel Options: Operates with either a 1-lb. propane cylinder or 20-lb. propane tank, giving you flexibility to choose the fuel source that works best for your application. Propane tanks and cylinders are not included.
  • Extended Heating Runtime: Get approximately 3 to 6 hours of heat from a 1-lb. propane cylinder or 48 to 110 hours when connected to a 20-lb. propane tank, depending on the selected heat setting.
  • Built-In Safety Shutoffs: An automatic low-oxygen safety shutoff helps protect against reduced oxygen levels, while the accidental tip-over shutoff automatically stops operation if the heater is tipped over.
  • Easy Propane Connection: The swivel-out connection makes attaching a propane cylinder or compatible hose straightforward, helping simplify setup when portable heat is needed.
  • Indoor & Outdoor Versatility: The compact heater is suited for temporary heating in tents, campers, RVs, hunting and fishing locations, workshops, garages, cabins, and other spaces where portable warmth is needed.
  • CSA Certified: CSA certification complements the heater's integrated safety features for added confidence during operation.
  • Compact Radiant Heating Design: Provides efficient radiant-style warmth without hardwiring, direct venting, or a built-in blower, making it a practical portable heating solution for a variety of environments.
  • 3-Year Warranty: Backed by a 3-year warranty for additional peace of mind. Not for sale in Massachusetts or Canada.

Key Specs

AttributeSpecification

item#

173690

Brand

Mr. Heater

Manufacturer's Warranty

3 year limited warranty

Ship Weight

9.02 LB

Heat Type

Radiant

Heat Output

9,000 Btu/hour

Heating Capability

225 ft²

Hardwired

No

Indoor-Outdoor Use

Indoor and Outdoor
AttributeSpecification

Assembled Width

9 in

Assembled Height

14.25 in

Assembled Depth

14.25 in

Needs Direct Venting

No

Remote Included

No

Heat Settings

2

Blower Included

No

Product Weight

lb

Dimensions L x W x H (in.)

7.0 x 13.0 x 15.0 in

Reviews

Questions & Answers

656 Reviews This action will navigate to reviews.

Questions

1–10 of 29 Questions  
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  1. Can this be attached to a propane tank & if so what are the needed attachments to do that?

    1. Yes, it has a built in regulator. All you need to buy is the hose from your local retailer.

      Helpful?

    2. Yes, Mr Heater makes a hose that will connect this heater to 5 through 20 pound tanks. They do not recommend using a larger tank than 20 pound. The hose is available in 2 different lengths, 5' which is part # F273701 and also 10' which is part # F273704.

      Helpful?

    3. It can be attached to a 20lb grill type tank with a hose that Mr. Heater makes. I believe they recommend a filter as well that they make. Don't know if the filter is a requirement or not.

      Helpful?

    4. Yes this can be hooked to a propane tank. Basically you need to match up the fitting on the small propane bottles.

      Helpful?

    5. All you need is the extension hose to any propane tank, you can see how the fittings line up. That way you do not have to rely on the small disposable tanks, it is more convienent and saves you some money too.

      Helpful?

    6. I attached mine to a bigger tank and saved a lot of money. You just need the adapter hose and filter.

      Helpful?

    7. Yes the Mr. Heater can be attached to either a 5lb to 40lb cylinder. You have a couple options with hose lengths, fuel filters, and regulators. See links below for options.

      Helpful?

  2. What are the venting requirements for this heater

    1. Little to none. I use mine all the time in my hunting blind.

      Helpful?

    2. The Buddy Portable Heater does not require venting and can be used safely indoors. If there is, by chance, an oxygen depletion, the heater has a sensor which will turn the heater off. We use this heater often during the camping season and have never had an oxygen depletion problem.

      Helpful?

    3. There is a LOW OXEGEN SHUTOFF, on this unit.I use it in a drafty old house.INSIDE. whith no problems.

      Helpful?

    4. No venting is required unless the oxygen in the room is depleted. If low oxygen is detected the unit will shut off and it can not be restarted until the oxygen is at a safe level again.

      Helpful?

    5. I always crack a window when using indoors. Any gas (flame) type heater can deplete oxygen, so by cracking a window or two will be sufficient. The unit has never set of my Carbon Monoxide detectors it burns very clean.

      Helpful?

    6. This heater requires a vent area of 9 square inches (example 3” x 3” opening) minimum for adequate ventilation during operation.

      Helpful?

  3. Can you safetly operate in a tent?

    I go camping with my son a lot with a coleman tent..

    1. I see no problem using in a tent, as long as it is centrally located (not near a wall)...just exercise common sense.

      Helpful?

    2. Mr. Heater Buddy Heater is safe for use in a tent to warm it up but not for all night use while sleeping and as long as the tent has areas that are vented, such as under a rain fly, it does have a low oxygen shut off but it better to have the tent ventilated.

      Helpful?

    3. The MH9BX is certified for indoor use. A requirement for indoor use is to allow the heater to have proper ventilation. A small 9 square inch opening is recommended.

      Helpful?

    4. This heater can be safely operated inside of a tent.

      Helpful?

  4. which extension hose should I order to connect to a 20# tank? The recommended one says for model no. 173634?

    1. It will work on this one as well.

      Helpful?

    2. I use a 5ft hose i bought on line

      Helpful?

    3. I WOULD CERTAINLY ORDER THE ONE RECOMMENDED AND THE FILTER THAT SCREWS ONTO THE HEATER WHICH WILL INCREASE THE LIFETIME BY 5

      Helpful?

    4. The Mr. Heater Buddy Portable Propane Heater item #173690 recommends two different lengths of hose item #173646 and #173645 for 20lb cylinders.

      Helpful?

  5. How much noise does it make

    1. it's silent. I use it in my deer stand

      Helpful?

    2. Mine is mostly silent...just some metal expansion/contracting when first turned on or off.

      Helpful?

    3. The manufacturer does not provide a decibel rating as it is too quiet to register. This heater makes a quiet hissing sound.

      Helpful?

  6. CAN THIS BE USED IN A GOLF CART?

    1. This Mr. Heater can be used in a golf cart as long as all clearance and ventilation requirements are meet. The clearances for this heater for combustibles are as follows: from the top you need 30” of clearance, from the front you need 24” of clearance, from the sides you need 6” of clearance and from the back 0” of clearance is needed. This heater requires a vent area of 9 square inches (example 3” x 3” opening) minimum for adequate ventilation during operation. You may also use the recommended Mr. Heater Golf Cart Heater, item 50757.

      Helpful?

    2. Yes but if tipped over it will cut off.

      Helpful?

    3. This Mr. Heater can be used in a golf cart as long as all clearance and ventilation requirements are meet. The clearances for this heater for combustibles are as follows. From the top you need 30” of clearance, from the front you need 24” of clearance, from the sides you need 6” of clearance and from the back 0” of clearance is needed. This heater requires a vent area of 9 square inches (example 3” x 3” opening) minimum for adequate ventilation during operation. You may also use the recommended Mr. Heater Golf Cart Heater (see below).

      Helpful?

  7. grill size propane tank safe to use inside small cabin?

    1. It is not recommended to use any tanks, other than the 1 lb canisters, indoors. With that in mind the extensions that are available allowing the use of tanks up to 20 LBS are inexpensive and easy to set up, on my motorhome I fed it thru the electrical door.

      Helpful?

    2. The 20 lb. grill size propane tank is not able to be used indoors, it is possible to run a hose from the 20 lb. propane tank outside to the heater that would be positioned inside.

      Helpful?

    3. No, you cannot keep the 20 lb tanks indoors, you can run a hose outside from the heater to the tank, but it is against federal regulation to keep a 20 lb propane tank indoors.

      Helpful?

  8. Can this be used *effectively* outdoors?

    I want to put this heater near my chair as I pass the evening in a campground before heading into my tent. But the manual states "note: The heater can be used outdoors, but may experience nuisance shutoffs due to certain wind conditions"

    How big a threat is that? Is the the heater totally useless for the application I want, or is the "nuisance shutoff" more of a theoretical than a practical problem? Thanks!

    1. Yes its not ideal for outside spaces. There is a flame that runs across the front ceramic element. If you don't have a windscreen, it's going to shut off with any significant wind. Even moving it quickly can put out the flame.

      Helpful?

    2. I haven't had trouble with it shutting off outside. I think it would be a fairly strong wind to bother. If you use some shelter to break the wind, such as by the tent, I would think it would be OK.

      Helpful?

    3. The "nuisance shutoff" is a safety feature on this heater. It is perfect for keeping you warm when putting it next to you outdoors. But if it is real windy out, there may be a problem with it shutting off.

      Helpful?

  9. What are the clearances to combustibles for this heater?

    Manual doesn't list these clearances.

    1. The clearances for this heater for combustibles are as follows. From the top you need 30” of clearance, from the front you need 24” of clearance, from the sides you need 6” of clearance and from the back 0” of clearance is needed.

      Helpful?

    2. Thank you for your inquiry. The clearance to combustibles are located on Page E2 of the owner's manual. Top: 30", Front 24", Sides 6", and Rear 0".

      Helpful?

  10. Can this heater be wall mounted?

    1. Probably not. Since heat rises quickly (and this heater puts out a lot of heat), the best location to place it is on the floor. Mine sits on its firm base in a corner of my 12 x 12 outdoor workshop about two feet out from both walls. Even though my workshop is not insulated, this heater will safely raise the inside temperature from 25 degrees F to 60 degrees F in about 20 minutes.

      Helpful?

    2. This heater is not designed to be mounted on a wall.

      Helpful?

Accessories We Recommend

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See All Hose Assemblies + Regulators
Mr. Heater Fuel Filter for Buddy Heaters, Model# F273699
4.5 out of 5 stars. 102 reviews

Mr. Heater Fuel Filter for Buddy Heaters, Model# F273699

Item # 173639

$12.99

Warranty

Manufacturer's Warranty

3 year limited warranty

Extend Your Warranty Coverage with a Northern Protection Plan (NPP)

Replacement Plan — 1 Year

A Northern Protection Plan is available after adding the product to your shopping cart.

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Mr. Heater, PORTABLE BUDDY HEATER, Heat Type Radiant, Heat Output 9000 Btu/hour, Heating Capability 225 ft², Model# MH9BX
4.8 out of 5 stars. 656 reviews
15 of 656 reviewers received a sample product or took part in a promotion

Mr. Heater, PORTABLE BUDDY HEATER, Heat Type Radiant, Heat Output 9000 Btu/hour, Heating Capability 225 ft², Model# MH9BX

Item # 173690

$99.99