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Mr. Heater Big Buddy Indoor/Outdoor Propane Heater — 18,000 BTU, Model# MH18B

Item# 173635
Mr. Heater Big Buddy Indoor/Outdoor Propane Heater — 18,000 BTU, Model# MH18B

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Was $139.99
Sale $114.99

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  • Up to 108 hours of use
  • CSA certified
  • Uses one or two 1-lb. or one 20-lb. propane tank (propane not included) with optional hose connections (Items 173645, 173646)
  • Blower fan uses A/C adapter (Item# 172641, sold separately) or 4 D-cell batteries (not included)
  • Minimum tank size: 1 lb.
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Product Summary

The Mr. Heater Big Buddy™ provides temporary heat for barns, sheds, cabins, campers, patios, garages, sporting events, hunting blinds and more. Dual heating system combines radiant heat comfort with convection heat air flow for maximum heating efficiency. 4,000, 9,000 and 18,000 BTU with the capacity to heat up to 450 square feet for up to 108 hours on 20-lb. propane tank.

What's Included
  • (1) Heater
Versatile

Versatile

Portable Heat for Anywhere, Any Time

The Mr. Heater Big Buddy™ Heater is the rugged and ready travel companion for keeping you toasty warm at work, at play or in emergencies — great for decks, patios, cabins, RVs, sporting events, tailgating, sheds, barns and more. Wherever it is needed, the Big Buddy Heater's sturdy handle makes carrying easy.

Heat and Fuel Options

The Mr. Heater Big Buddy Heater features a dual-heating system, combining radiant heat comfort with convection heat air flow for maximum heating efficiency. Choose three heat settings (4000, 9000 or 18,000 BTU) for the perfect comfort level every time. The Big Buddy heater can be powered using one or two 1-lb. propane cylinders or a 20-lb. cylinder (none included). Heat up to 108 hours on a single 20-lb. propane tank with the optional hose connection (not included).

Durable

Designed to Last

You can count on the Mr. Heater Big Buddy Heater to deliver comfortable warmth season after season. Engineered with dual ceramic burner tiles with shock-absorbing floating insulation to provide extra durability. High-temperature heavy-duty safety wire guard prevents damage and mishaps. The handy fully enclosed fuel compartment protects and hides propane cylinders.

durable
Safe, Effective and Easy to Use

Safe, Effective and Easy to Use

Approved for Use Indoors or Outdoors

The Mr. Heater Big Buddy Heater is a safe and effective choice whether indoors or outdoors. Built-in safety features include an automatic low-oxygen shutoff system and a tip-over switch. The blower fan spreads warmth more quickly to enhance heating of up to 400 square feet.

No Matches or Electricity Required

When you need heat, there are no complicated, messy procedures involved. Simply use the push-button igniter. Adjust the heat control knob to the desired position and enjoy. Plus, fuel connections are easy, thanks to the swivel regulator.

Features + Benefits

Features for Mr. Heater Big Buddy Indoor/Outdoor Propane Heater — 18,000 BTU, Model# MH18B
  • Up to 108 hours of use
  • CSA certified
  • Uses one or two 1-lb. or one 20-lb. propane tank (propane not included) with optional hose connections (Items 173645, 173646)
  • Blower fan uses A/C adapter (Item# 172641, sold separately) or 4 D-cell batteries (not included)
  • Minimum tank size: 1 lb.
  • Not for sale in MA and Canada
Key Specs
Item# 173635
Brand Mr. Heater
Manufacturer's Warranty 1 year Limited Warranty
Ship Weight 19.0 lbs
Category Type Forced air
Needs Direct Venting No
Regulator Included No
Heating Capability (sq. ft.) 450
Heat Settings 3
BTU Output 18,000
Clearance from Corner (in.) 6
Clearance from Rear Wall (in.) 6
Clearance from Side Wall (in.) 6
Thermostat Included No
Blower Included Yes
Blower Power Supply (Volts, Amps) 110
Fuel Consumption (gal./hr.) 3–12 hrs. on two 1-lb. tanks, 50–220 hrs. on two 20-lb. tanks
Igniter Matchless push-button starter
Oxygen Depletion Sensor Yes
Remote Included No
Dimensions L x W x H (in.) 18 3/4 x 11 x 16 7/8

Customer Reviews

Product Question + Answer
Accessories Frequently Purchased with this Item

You'll Need

Propane Tanks + Equipment

Worthington Cylinders Propane Tank with OPD Valve and Sight Gauge — 20 Lbs.
Worthington Cylinders Propane Tank with OPD Valve and Sight Gauge — 20 Lbs.
Item# 24855
Factory Shipped —
Estimated Delivery: 7 - 9 Business Days
Was $44.99
Sale $37.99

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We Recommend
Mr. Heater AC Power Adapter for Big Buddy Heaters — 6 Volt, Model# F276127
Mr. Heater AC Power Adapter for Big Buddy Heaters — 6 Volt, Model# F276127
Item# 172641
In Stock Online
Was $19.99
Sale $16.99

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Mr. Heater Fuel Filter for Buddy Heaters, Model# F273699
Mr. Heater Fuel Filter for Buddy Heaters, Model# F273699
Item# 173639
In Stock Online
Was $9.99
Sale $7.99

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Mr. Heater Hose Connection For Buddy Heaters — 12ft. Length
Mr. Heater Hose Connection For Buddy Heaters — 12ft. Length
Item# 173646
In Stock Online
Was $29.99
Sale $24.99

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Mr. Heater 12-Ft. Hose with Regulator for Item# 173635
Mr. Heater 12-Ft. Hose with Regulator for Item# 173635
Item# 1736350
In Stock Online
Was $39.99
Sale $37.99

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Mr. Heater Hose Connection For Buddy Heaters — 5ft. Length, Model# F273701
Mr. Heater Hose Connection For Buddy Heaters — 5ft. Length, Model# F273701
Item# 173645
In Stock Online
Was $22.99
Sale $16.99

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Mr. Heater Big Buddy Carry Bag, Model# 18BBB
Mr. Heater Big Buddy Carry Bag, Model# 18BBB
Item# 28034
In Stock Online
Was $34.99
Sale $24.99

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Safety
FREE SHIPPING - Gravel Gear Men's Utility Work Gloves - Black and Tan, Large FREE SHIPPING - Gravel Gear Men's Utility Work Gloves - Black and Tan, Large
Item# 77489L
In Stock Online
Was $16.99
Sale $13.99

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Replacement Parts
Call To Order: 1-800-657-0516

Mon - Fri 7:00 AM - 6:00 PM (Central)
Sat 7:00 AM - 3:00 PM (Central)

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Hide Similarities
Category Type Radiant heat Radiant heat Radiant heat Forced air Forced air
Needs Direct Venting No No No No No
Regulator Included Yes - Yes No Yes
Heating Capability (sq. ft.) 100 225 100 450 875
Heat Settings - 2 - 3 -
BTU Output
3800 9,000 4,000 18,000 35,000
Clearance from Corner (in.) 6 6 12 6 24
Clearance from Rear Wall (in.) 6 6 12 6 24
Clearance from Side Wall (in.) 6 6 12 6 24
Thermostat Included No No - No No
Blower Included No No No Yes Yes
Blower Power Supply (Volts, Amps) - - - 110 115
Fuel Consumption (gal./hr.) 5 1/2 hrs. on a 1lb. tank - - 3–12 hrs. on two 1-lb. tanks, 50–220 hrs. on two 20-lb. tanks -
Igniter Pezio Pilot light Piezo Matchless push-button starter Piezo
Oxygen Depletion Sensor Yes Yes Yes Yes Yes
Remote Included No No No No No
Dimensions L x W x H (in.)
8 1/2 x 8 x 10 7 x 13 x 15 12 x 9 3/4 x 12 18 3/4 x 11 x 16 7/8 17 x 9 3/4 x 14