Best Gas Ceiling Heaters For Garage

A garage is one place that is difficult to warm in the heart of winter. One of the reasons is that the central heating system isn’t always enough to boost the garage’s temperature. If it’s detached, it’s even worst because you have to find another alternative to get the warmth in there.

One of the popular types of garage heaters is electric space heaters. However, most of them will increase your heating bills significantly. If you like spending time in the garage even in winter, you want to find a heater that will provide the needed warmth without cranking your heating bills.

An excellent option would be gas ceiling heaters for garage. At one end, these units are more energy efficient than electric heaters and provide clean heating. On the other end, they save floor space that you can use to store other tools and equipment.

If you want to find the best ceiling heaters for garage, check out this comparison table.

How Much Does It Cost to Run a Natural Gas Garage Heater?

The cost of running a natural gas garage heater depends on the length of time during which the heater is on and the unit cost of natural gas.

You can control the length of time during which the heater is on. The time depends on the heating requirements of your garage and your preference.

Natural gas is measured in units called therms. One therm of natural gas contains 100,000 BTUs. If you have a natural gas heater with a standard capacity of 30,000 BTU rating, then it will run for about 3 hours on one therm of natural gas.

The unit price of natural gas is $0.28 per hour. If you run the heater for 10 hours every day for a month, then the cost of keeping your garage warm for the entire month would be $84.

Gas VS Electric Garage Geater – Which is Better?

Both electric and gas heaters provide reliable and effective sources of heat for garages. However, there are essential differences between the two sources of heat that you may need to consider when deciding which heating method to use.

It is cheaper to run a gas heater in your garage than an electric heater in terms of cost. Electric heaters that depend on electric current to generate heat have higher operational costs than heaters, which burn natural gas to produce heat. The unit price of electricity per hour is higher than that of natural gas, which is $0.28.

There are significant differences in the installation costs for electric and gas heaters. Electric heaters are sold in a ready-to-use form. You only need to connect them to the mains supply and turn them on to have a warm room.

Gas heaters may need to be vented either through the wall or the roof of your garage. The venting process is detailed and requires the input of a technician. Furthermore, to use gas heaters in the garage, you will have to reroute the main gas line.

This procedure, in most cases, is expensive. As a result of these differences, the cost of installing a gas heater is by far higher than that of installing an electric one.

Gas heaters are noisier than electric heaters. When electric heaters get turned on, they produce low-level noises in the form of buzzes or pops. However, the noise subsidizes after some time.

Gas heaters are quite noisy because of two reasons: the combustion process and fans. For heaters that have inbuilt fans, their operation is quite loud.

Even for the gas heaters, which do not have fans, a considerable noise level is produced as the natural gas gets burned in the combustion chamber. The noise of the burning gas may be amplified if your garage is large and empty.

How Do you Size a Natural Gas Garage Heater?

It is not easy to determine the accurate size of a natural gas heater for a garage because many factors affect garages’ heating requirements.

Garages are typically drafty than indoor rooms. As a result of garages’ drafty nature, a lot of heat energy is wasted on the outside environment. Thus, it would help if you produced enough heat energy to compensate for the losses.

Also, the insulation level of garages is often more insufficient than that of the main indoor spaces. Poor insulation of the garage means that a lot of heat energy is lost through crevices and other openings.

Similarly, you must consider the amount of heat energy that is lost and factor it into your calculations for the garage’s heating requirements.

To quickly determine the size of a natural gas heater suitable for your garage, first determine the area of the space by multiplying the length by the width. If you have a square garage that is 200 feet wide, then its area will be 400 square feet.

Second, divide the area of the garage by 200 before multiplying the answer by 9,000. The final answer will be the number of BTUs needed to keep the garage warm.

In our example, the total number of BTUs needed to adequately warm the garage would be 18,000. You will work with this figure when selecting a natural gas heater for the garage.

However, it is necessary to consider other factors such as insulation and even the height of the garage ceiling. Garages or any high ceilings spaces have higher heating requirements than those with lower or average ceiling heights.

If you need to heat 3 car garage, here is how you can size a heater for a 3 car garage.

Best Gas Ceiling Heaters For Garage

1. Modine HDS45AS0111 Natural Gas Hot Dawg Garage Heater

Modine HDS45AS0111 Natural Gas Hot Dawg Garage...
  • Natural Gas 45,000 BTU's 80% Efficient
  • For use where combustible materials are present (ie. Paint or Woodworking Shop)
  • Commonly used in 2 - 2.5 Car Garages
  • Separated Combustion: Fresh air intake and separate exhaust
  • Model: HDS45AS0111

The Modine HDS45AS0111 is a small but powerful gas heater that can you can use to warm up your garage conveniently. Because the heater draws 100% of its combustion oxygen from the outside environment, it does not interfere with the garage’s air quality.

Similarly, the standard power exhaust, which allows for horizontal and vertical venting, ensures the successful removal of all byproducts. Therefore, the heater creates a comfortable environment within your garage for working.

The Modine HDS45AS0111 comes with several accessories, including a hose and two angle brackets. You can use the two-angle brackets to properly mount the heater for heating specific places in the garage.

However, installing this heater on the wall or ceiling is not an easy process. It may be wise to get a HIVAC professional to help you complete the process and ensure that the heater is running correctly.


  • Its compact design and grey color blends well with the garage ceiling
  • Designed for vertical or horizontal venting
  • Sold with multiple accessories, including a hose and two angle brackets


  • Complex installation procedure

2. Mr. Heater F272700 Propane Garage Heater

Several features make the Mr. Heater F272700 the right choice for warming up standard-sized garages.

It comes with a thermostat that you can program to maintain the temperature in your garage within the desired levels. Doing so keeps your car batteries in excellent shape and creates a cozy environment for you to work from the garage.

Additionally, you do not have to worry about routine maintenance procedures once you have the heater adequately installed. The device requires very little maintenance yet delivers excellent heating results without electricity and is also one of the quietest garage heaters.

Although Mr. Heater F272700 has a 40,000 BTU rating, which is enough to warm spaces that are large as 1,000 square feet, it cannot evenly warm larger areas.

Typically, gas ceiling heaters do not have fans for spreading the heated air evenly. Although the heater’s radiant heating technology is suitable for a spot or zonal heating, it cannot be relied on to warm large spaces uniformly.


  • Thermostat included for personalized heating
  • Requires very little routine maintenance
  • Suitable for heating up to 1,000 square feet of space


  • It cannot provide uniform heating in large garages

3. Mr. Heater F260560 Big Maxx MHU80NG Natural Gas Unit Heater

Mr. Heater F260560 Big Maxx MHU80NG Natural Gas...
  • Your purchase includes One Mr. Heater Big Maxx Natural Gas Heater with 2 angle brackets & Liquid Propane conversion kit | Thermostat, hose & regulator not included
  • Heater dimensions – 29.33” L x 15.50” W x 26.37” H | Coverage area – 2000 Sq. Ft. | Performance – 80,000 BTU | Amps – 2.3 | Voltage – 120 V | Min 8 ft. clearance from floor to base of unit
  • For use with natural gas | Category 1 vertical, category 3 horizontal venting
  • Powered exhaust allows for vertical or horizontal venting | Spark ignition features self-diagnostic control module
  • This heater offers the operating versatility and safety that you have come to expect from Mr. Heater | Limited 3 year warranty on parts and burners

Mr. Heater F260560 is a highly versatile gas heater for small to medium-sized garages. It has a sturdy build that complements its excellent performance scores to deliver value for your money.

You may not even need to use the three-year warranty on parts and burners that the heater comes with because if properly installed and maintained, the heater remains in excellent shape for many years.

It comes with all the accessories that you would need to warm your garage conveniently, including a hose, angle brackets, and a liquid propane converter.

You can use the two-angle brackets to make it easy for anyone to tilt the heater in the required direction. This practice helps to carry out spot or zonal heating in your garage.

The only significant drawback of using this heater relates to the installation process. You may need to get a certified technician’s services to help you get the heater up and running in your garage.


  • Highly durable because of the sturdy design and the use of quality materials
  • Allows for vertical and horizontal venting
  • It has an easy-to-use spark ignition and a self-diagnostic control module


  • The installation process is quite detailed

4. Mr. Heater F272200 MH25NG 25,000-BTU Natural-Gas Radiant Heater

One of the most notable features of the Mr. Heater F272200 MH25NG is its design. It has a unique design that features a steel grid that is plated in chrome and a highly effective reflector.

Its elongated mounting hardware is ideal for installing the heater either on the roof or wall. Besides, this heater comes with a detailed how-to installation video. You will get all the details of screwing either on the garage wall or ceiling in the package.

When properly mounted, this heater can be the perfect source of heat in your garage. The radiant heat can be used for spot or zonal heating in the garage, thus helping you save on the total heating costs.

Sadly, this heater is only suitable for warming small-sized garages that measure up to 625 square feet. Its BTU rating of only 25,000 is low compared to other brands with as much as 80,000 BTU ratings.

However, if you only need a small gas heater for warming your two-car garage, then Mr. Heater F272200 MH25NG may be the right choice.


  • Easy installation because the heater comes completely assembled and with a how-to video
  • Efficient for spot heating
  • The thermostat can be used to program and personalize the heating


  • Low heating capacity suitable for only 625 square feet areas

Wrap Up

Picking a heater for your garage doesn’t have to be challenging if you know what to look for. The most important factor is to estimate your room’s size and determine how many BTUs you’ll need.

Most gas ceiling heaters for garages have higher BTU levels and will be enough for 2 or 3 car garages. If you’re asking for only one heater, I’ll recommend Modine HDS45AS0111 Natural Gas Hot Dawg Garage Heater because it’s big enough for 2 to 2.5 car garages.