Please see replacement item# 173650. Mr. Heater Natural Gas Garage Heater — 45,000 BTU, Model# MHU45NG Item# 173636

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Please see replacement item# 173650. Mr. Heater Natural Gas Garage Heater — 45,000 BTU, Model# MHU45NG | Buy Item# 173636 now for only $469.99

Please see replacement item# 173650. Mr. Heater Natural Gas Garage Heater — 45,000 BTU, Model# MHU45NG

Item# 173636

Only $469.99

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Overview

Features + Benefits

Heats 1.5- to 2-car garage
Requires only 1in. clearance from ceiling
Power exhaust allows for 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
Venting kit required (sold separately, Item#s 173640 or 173642)
Optional thermostat also available (sold separately, Item# 173641)

See Feature Highlights

Content Links

	Heaters Buyer's Guide
	173636 Product Manual

Key Specs

Primary Heating Application	Garage, workshop
Vent-Free	No
BTU Output	45,000
Blower Included	Yes
Fuel Type	Natural gas
Igniter	Spark
Thermostat Included	No
Remote Included	No
Oxygen Depletion Sensor	No
Dimensions L x W x H (in.)	25 1/2 x 19 x 12
Manufacturer Warranty	12 months parts / 12 months labor
Ship Weight	70.0 lbs
Item#	173636

Brand

	Shop for Mr. Heater

Review Terms + Conditions

Print Reviews for Please see replacement item# 173650. Mr. Heater Natural Gas Garage Heater — 45,000 BTU, Model# MHU45NG

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173636 Product Manual

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Items You'll Need

Venting

Add

Vertical-Mount Vent Kit For Mr. Heater 45,000 BTU Garage Heaters — 3in. Flue Pipe In Stock	Item# 173640		Only $119.99

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Mr. Heater Universal Gas Connection Kit, Model# F271239 In Stock	Item# 172712		Only $26.99

Thermostats

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Thermostat For Mr. Heater Garage Heaters In Stock	Item# 173641		Only $34.99

Manufacturer Warranty: 12 months parts / 12 months labor

Protect Your Purchase Beyond The Manufacturer's Warranty With Service Protection Plus!

Extended Service Plan Description (learn more)	1 Year	2 Year
Replacement Plan	$49.99 More Info	$69.99 More Info
Accidental Damage Replacement Plan	$79.99 More Info	$99.99 More Info

Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

4.6 / 5

77 of 79(97%)would recommend this product to a friend.

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This Mr. Heater Natural Gas Garage Heater is a quiet, vented heater for residential and commercial use that easily heats a 1.5- to 2-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. Customers are responsible for checking their local codes and Ordinances for approved installation and usage. Venting kit required (sold separately, Item#s 173640 or 173642). Optional thermostat also available (sold separately, Item# 173641). Primary Heating Application: Garage, workshop, Vent-Free: No, BTU Output: 45,000, Blower Included: Yes, Fuel Type: Natural gas, Igniter: Spark, Thermostat Included: No, Remote Included: No, Oxygen Depletion Sensor: No, Dimensions L x W x H (in.): 25 1/2 x 19 x 12 Heats 1.5- to 2-car garage Requires only 1in. clearance from ceiling Power exhaust allows for 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 Venting kit required (sold separately, Item#s 173640 or 173642) Optional thermostat also available (sold separately, Item# 173641)

Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

5 / 5

Easiest Install-Best Price-Most Heat,

February 19, 2008

By projectman50

from Chaska, MN

"I purchased Mr. Heater model MHU45NG 45,000 BTU unit for my 26x28 2-car garage with 10 ft. ceilings. This heater is awesome, the blower distributes a mega heat source. I am able to heat my garage on sub-zero days from 20F inside to 68F within 20 minutes. I wired in a Honeywell digital thermostat and control the garage temperature to 40F all winter. It has been a very cold winter here in Minnesota this year, and my Mr. Heater allows me to do many winter projects, I would otherwise have to wait till Spring to do in my garage.

I would recommend Mr Heater to any homeowner that loves a warm garage."

What is your level of technical expertise? Home Handyman

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

5 / 5

Mr Heater Garage Heater,

November 16, 2006

By nuthinman

from Taos, NM

"Purchased the Mr. Heater Natural Gas Garage Heater to install in a 30'x28' garage. This heater is awesome, it heats my garage up to a comfortable 65 degrees in minutes, even though it may be 15 degrees outside. It's quiet, efficient, and spreads the heat throughout the garage. I chose it as it is compact and space saving with it's only 1" clearance to the ceiling.
Installation was simple, and after adjusting for an altitude of 7000', it fired right up and has not missed a beat since. I would highly recommend this heater to anyone. It is and A1 unit."

What is your level of technical expertise? Professional

7 of 7 people found this review helpful.

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

3 / 5

good heater,

September 13, 2010

By fruity

from iowa

"Very nice heater, made my 3 car garage warm without a hitch...was loud in the house above the garage, low rumble from the fan connected to the roof trusses. would recommend, but need to find a place that won't be attached to common roof or floor trusses or you may think it is too loud in the house. not really loud in the garage"

What is your level of technical expertise? Home Handyman

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

5 / 5

MR. HEATER, NAT. GAS,

June 2, 2010

By diamondamron

from TENN.

"I PURCHASED THIS HEATER ABOUT 3 YEARS AGO, I WAS SKEPTIC ABOUT THE OUTPUT OF THIS HEATER, IT IS GREAT, WELL WORTH THE PRICE... GREAT OUTPUT, CHEAP TO OPERATE, EASY TO INSTALL, GREAT PRODUCT....."

What is your level of technical expertise? Home Handyman

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

4 / 5

Mr. Heater garage heater,

June 1, 2010

By Reviewer99

from Saint Charles, IL.

"Heater arrived in good condition, one bent louver and one dented corner in lower front, almost big enough to send back but wasn't worth it. All parts arrived with heater as indicated. I was replacing an older heater so the duct work was already in place. I had to change the ceiling mount in order for the exhaust to line up. The whole installation took about 3.5 hours, the hardest part was getting it up to the ceiling. The unit has been installed now for 9 months and runs quiet and flawless, so much quieter than the 18 year old unit I replaced that there is no comparison. The only negative I need to comment on was the exhaust part didn't line up with the outer sheet metal opening, I had to remove about 3/4" on the inside edge for proper clearance."

What is your level of technical expertise? Home Handyman

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

4 / 5

45K BTU Mr. Heater,

June 1, 2010

By mgb4

from Northern MI

"I use this unit to heat my 720 sq. ft. garage (insulated), and have had no issues. I live in northern Michigan, and this heater has to overcome some very cold temperatures at times. I usually turn the heater on about an hour before I start my work. I thermostatically control to about 55 to 60 degrees, and have used this unit for 2 winters now."

What is your level of technical expertise? Home Handyman

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

5 / 5

Mr Heater Garage Heaters,

May 31, 2010

By 31CadMan

from Detroit area, Michigan

"I have both the 45,000 and 75,000 BTU versions of this heater, and am pleased with both. They have run several years with no problems, were easy to install and start up. They replaced a single large furnace in my shop, and allowed me to set the temperature separately in the shop and storage area."

What is your level of technical expertise? Home Handyman

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

5 / 5

a great heater,

May 24, 2010

By ljflax

from kansas

"I purchased this heater and it works great,two of my freinds have purchased them also.It does not use much gas and keeps the garage very warm."

What is your level of technical expertise? Professional

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

5 / 5

Awesome shop/garage heater,

May 24, 2010

By Lazyman

from Yakima,WA

"Finally got this completely installed in my 2 car garage. This heater is AWESOME!! I could not be happier. Wish I would have bought this years ago. Massive heat output, Sound is very tollerable for forced air. Installation was not bad for experienced handyman but, I would recommend professional installation or at least some professional help. I had an HVAC guy install my natural gas line. Only complaint I have is with the knockouts for the electrical connections. I don't think the machine was setup correctly. They were a giant pain. Had to drill a hole in the center an peel them out with pliers. I still give this heater 5 stars. If I move or build a shop you can bet I'll buy another one."

What is your level of technical expertise? Home Handyman

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Mr. Heater Mr. Heater Natural Gas Garage Heater - 45,000 BTU, Model# MHU45NG

Overall Rating:

5 / 5

Mr. Heater 45000 BTU Natural Gas Heater,

February 26, 2010

By regguy1

from NE Ohio

Reviewer Images

(click to see full-size image)

"Purchased the 45000 BTU NG Mr Heater for my 30' x 26' / 780 SF detatched garage. It heats the space with ease, I have R13 in the ceiling and walls( wall insulation installed after photos were taken). Instructions and installation were straight forward and the unit fired up on the first try. I keep the garage at 40 degrees during the night, This heater will warm the garage to 65 degrees within 20 minutes when I go in to work. The fan moves the air very nicely. The second day I noticed a delay in the burner lighting so I called the 800 number and the technician sent out a new circuit board the next day and it has worked perfectly since. After installing the heater my garage has become much more useful, I'm now in the process of finishing the interior. (in comfort during the winter). For the price and performance and good customer service, I'd say it is a good buy."