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Mr. Heater Propane Garage Heater — 75,000 BTU, Model# MHU75LP

Item# 172645
Mr. Heater Propane Garage Heater - 75,000 BTU, Model# MHU75LP
Mr. Heater Propane Garage Heater — 75,000 BTU, Model# MHU75LP

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Mr. Heater Propane Garage Heater — 75,000 BTU, Model# MHU75LP

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  • Heats 2- to 3-car garage
  • Requires only 1in. clearance from ceiling
  • Power exhaust allows horizontal or vertical venting
  • Designed for right or left side piping, electrical and flue connections by simply rotating 180°
  • Tubular heat exchanger

See full description

  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Accessories

  • Warranty

  • Compare

Product Summary

Quiet, vented heater for residential and commercial use easily heats 2- to 3-car garage. Requires only 1in. clearance from ceiling with 2 included angle brackets which means heater is up and out of the way. Power exhaust allows for vertical or horizontal venting. Low-profile cabinet measures 18in.W x 12in.D x 25in.H. Venting kit required (sold separately). Optional thermostat also available (sold separately, Item# 173641). Consumer is responsible for checking local codes and regulations for use in their area.

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Product Manual

Features + Benefits

  • Heats 2- to 3-car garage
  • Requires only 1in. clearance from ceiling
  • Power exhaust allows horizontal or vertical venting
  • Designed for right or left side piping, electrical and flue connections by simply rotating 180°
  • Tubular heat exchanger
  • Note: Due to BTU loss through exhaust gases, heater runs at approx. 81% operating efficiency
  • 10-year limited warranty on heat exchanger; 3-year limited warranty on parts and burner

Key Specs

AttributeSpecification

item#

172645

Brand

Mr. Heater

Manufacturer's Warranty

12 months parts / 12 months labor

Ship Weight

88.6 LB

Heat Output

75,000 Btu/hour

Heat Type

Convection

Heating Capability

1,000 ft²
AttributeSpecification

Blower Included

Yes

Blower CFM

950 cfm

Amps

0.5

Thermostat Included

No

Remote Included

No

Oxygen Depletion Sensor

No

Reviews

Questions & Answers

135 Reviews This action will navigate to reviews.

Questions

1–10 of 16 Questions  
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  1. I have a shop 32' X 36' w/ 6" walls 12' ceiling, Zone 4 climate. can I get by with a 45,000 BTU Htr to maintain 50 deg. and 70 Deg. once in a while?

    Would it be more efficient to have a 45,000 BTU or a 75,000 BTU?
    I have insulated walls , sheet rocked.
    I'm not in a hurry to heat the space to 70 Deg.
    The main concern is; can the 45,000 BTU maintain, or is it more cost effective using the 75,000 BTU running a shorter time to maintain a temp?

    1. I'm running the 75K unit in my 30 X 40 shop with 10' ceilings, but my walls are 10" concrete. I generally prefer to go with the larger unit figuring it will more easily handle the load. That way if you have a prolonged cold snap your heater isn't running 24/7. Go with the bigger one. (My opinion only) Mine is usually set at 50F unless I am working on the tractor or washing a vehicle. Then I bump it up to 70. It takes very little time to heat things up.

      Helpful?

    2. I was in the same situation. I went with the 75000 on a 30 x 40 x 16 and Im glad I did. For a couple of extra bucks go with the 75000.

      Helpful?

    3. Yes, 45,000 BTU will woork just fine.
      I have the 75,000 and my garage is 24 X 28 with 16, ceiling. I also install a ceiling fan on the other end of the garage and this works very well.I know now I could of install a 45,000 BTU and be just find. I thought at the time bigger is better . I don`t need all the extra heat it can produce.

      Helpful?

    4. With the area being almost 14,000 cubic feet and 70 degrees being the desired temperature at times, you should be considering the 75,000 BTU heater. The larger heater is not going to work as hard, making it more cost effective and ensuring a longer life to the heater.

      Helpful?

  2. Can you hook this unit up to a programmable thermostat?

    I would like to hook this up to a 7-day programmable thermostat, can I?

    1. Because this heater has a direct spark ignition, the level of energy may be sufficient to disturb the logic circuit in a microprocessor controlled thermostat. It is
      recommended that an isolation relay be used when connecting the heaters to a microprocessor controlled thermostat.

      Helpful?

    2. Yes. You should be able to use just about any kind of thermostat.

      Helpful?

    3. yes

      Helpful?

    4. This unit will run on any 24 volt Thermostat.

      Helpful?

  3. how long will a 100 lb tank last

    1. Hi Mike.

      Guess it depends on the temperature you set it at, the heat loss of your building and the environment. I typically burn 250 Gal per year keeping a 30 X 40 garage with 10" concrete walls (partially buried on rear and sides) and 10' ceilings at about 50F. NH winters are Zone 4, I would estimate in my area.

      Helpful?

    2. Not long if you want to heat the building 24/7. I set my thermostat at 50 when I'm out and 65 when Im working in the building and it can use .75 to 1.5 gal per hour so get atleast a 250

      Helpful?

    3. This heater will consume about four pounds per hour at 75,000 BTU's and about 1 pound per at 22,000 BTU's.

      Helpful?

    4. I am not the resident product expert, but how long your fuel would last depends upon how cold of a climate you live in, how warm you set your thermostat, if you heat your building full time or only when you are working out there... quite a few variables. The reason for the need for the 100# tank is so you have the capacity to vaporize enough LP for the heater to operate correctly, especially in very cold weather.

      Helpful?

  4. recommended size of propane tank for the 75,000 btu heater

    1. This depends on how often you want it filled. See preceding question and answer for best estimate.

      Helpful?

    2. Get atleast a 250 gal tank. Heater can use .75 to 1.5 gal per hour depending on settings

      Helpful?

    3. I have 2 - 120 gallon tanks per 75k BTU Mr Heater. As it happens, the tanks were in place from the previous owner, so I kept them and use them sparingly. Having said that, you could get along fine with 1- 120 gallon fuel tank.

      Helpful?

    4. This Mr. Heater Propane Garage heater requires a minimum propane tank of 100 pounds.

      Helpful?

  5. Installation question

    I am about to install this unit in my garage where an older unit was mounted from the ceiling. The previous unit was supported by 4 ( one in each corner) 1/2x13 threaded rods with a shelf underneath the unit allowing the unit to sit on the shelf.
    Is there any reason I should worry about sitting this new unit back on that same shelf with the current support system
    My concerns are any restriction of air from the bottom side and any concern for heat build up again at the bottom. I can always make a new shelf from a non flammable material to avoid that issue but I am more concerned about air flow around it or thru the bottom side.
    Thanks

    1. This sounds like a perfect plan. (As long as your shelf is large enough to accommodate the unit.) As I recall, nothing comes in through the bottom. Piping, venting and electrical are all through the sides and rear.

      Helpful?

    2. you wont need to support it with the shelf. Its not that heavy. I used just 1/2 inch rod on four corners and it works fine. Just put some rubber insulators on the mounting braket to keep noise down. The unit does get hot on the bottom panel but not enough to cause a problem

      Helpful?

    3. There is no airflow or clearance needed on the base of the unit. However, it is suggested that you use a non-flammable material for the shelf.

      Helpful?

  6. does this require a regulator in-line if i use 100lb. cylinders for fuel source? does northern sell one?

    1. The regulator is typically mounted on the tank outside. The people who supply your tank also furnish the regulators.

      Helpful?

    2. Yes you still need a regulator

      Helpful?

    3. We do not offer a regulator for use with this item. Please contact your local petroleum supplier to obtain the proper regulator. The regulator will need to meet the following criteria: A line pressure of 13" w.c. (330mm w.c.). For more information on gas connection, please refer to the owners manual (available at the bottom the product page in .pdf format).

      Helpful?

  7. see details

    Mr. Heater Propane Garage Heater — 75,000 BTU, Model# MHU75LP..I am inerested in purchasing this unit. What type of propane gas line do I need to operate this unit, and do I need to have a professional to test the gas line and manifold pressures? Or can I hook up the gas line myself?

    Thanks...Mike

    1. Hi Mike.
      I'm feeding it from my propane tank with buried 3/8 copper line. The regulator is on the tank so it's low pressure in the line. Be sure to install a moisture collector and use gas line tape or sealant. I obviously don't know your level of technical expertise, but it doesn't hurt to have your local gas tech check it for leaks before firing it up. Hope this helps!

      Mike

      Helpful?

    2. When dealing with propane I would use your gas provider/contractor to connect. No sense in trying to save money only to have it leak away......

      Helpful?

    3. It is best to contact your local gas company to ensure a safe reliable installation of this product.

      Helpful?

  8. Can i use this with Natural Gas?

    Hi there - im looking for a 75000 BTU Natural gas garage heater - i know this indicates it is a Propane heater, but i have a natural gas line in the garage, and would like to have a heater with enough power to heat my garage using Natural Gas, not propane.

    Thanks in advance for your response!

    1. You can buy this heater in either Natural Gas OR Propane configurations. Just specify which you want in the search engine and it will guide you to the correct one.

      Helpful?

    2. No, this heater is for use with propane only, but we do offer this same heater in a natural gas model. These are great for both residential and commercial use. The item # for the natural gas heater is 172644. Please see below for the natural gas heater and venting options.

      Helpful?

    3. Northern Tool has a NG version of this heater.

      Helpful?

  9. How many BTU do I need for 950 sq ft shop 10' sidewalls 6" wall insulation 14" ceiling

    1. The 75,000 btu heats my garage perfectly. My garage is close to the same size as yours.

      Helpful?

    2. It would depend on the temperature rise you would like to obtain.. A 30 degrees rise will require approximately a 40,000 BTU heater and a 40 degree rise will require a 54,000 BTU heater.

      Helpful?

  10. I have a pre-installed, 120V line-voltage thermostat.

    Can I jumper across the thermostat input terminals so that the unit is in an "always on" condition?

    1 answer

    1. Yes, running a jumper wire between the R terminal and the W terminal will put the heater to an always on status, heater would then be controlled by an on/off switch.

      Helpful?

Accessories We Recommend

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Thermostat For Mr. Heater Garage Heaters
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Thermostat For Mr. Heater Garage Heaters

Item # 173641

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Warranty

Manufacturer's Warranty

12 months parts / 12 months labor

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.