How To Install King Electric Garage Heater [Step By Step Guide]

Installing a garage heater to control the temperature helps extend your vehicle's life. You might consider installing a King electric garage heater, but how do you do it? Look no further because we have done the research to provide you with answers.

Homeowners can install King Electric garage heaters by mounting them to the ceiling or a wall no higher than 10 feet off the ground. To install and wire a King Electric garage heater, you need to:

  • Predrill holes for the bracket and insert lug screws.
  • Place and secure the bracket to the surface.
  • Secure the washer screw and hook on top of the heater.
  • Hang the hook on the bracket and secure it.
  • To start wiring, remove the knock-out at the bottom back of the unit and insert the wiring into the hole.
  • Attach a cable clamp to secure the wires into place.
  • Connect the two hot wires under the two screws on the circuit board.
  • Secure the two ground wires with electrical tape.

Installing a King electric garage heater requires electrical work, and you might need professional help. However, if you are confident with preparing all the wiring for the heater, continue reading our step-by-step guide below. 

Big heavy industrial electric fan heater in double car garage interior, How To Install King Electric Garage Heater [Step By Step Guide]

How Do I Install A King Electric Heater In My Garage?

Unstable weather can cause your car to expand and contract. A King electric garage heater is a low-cost but efficient heater brand. Installation requires two essential parts: mounting the unit in the best possible area and connecting the heater to your home's electrical source.

Worker installing ceiling mounted gas heater

Even if you are knowledgeable in installing electrical machinery, proper precaution is advised when installing the heater.  It is also important that the heater isn't obstructed from airflow.

Before you start the installation, ensure the power is turned off. Manufacturers recommend mounting the King heater on either a wall or the ceiling. Ensure you have company when carrying the heater unit up a ladder or any elevated surface and the right tools.


  • Four lug screws
  • Two screws
  • One washer screw
  • Drill screw (If you are going to attach the lug screws to a dense surface, use an impact driver)
  • 3/8 socket wrench
  • Cable clamp
  • Electrical tape

Check out this socket wrench on Amazon.

Optional Tools

  • Solder 
  • Solder iron

Below is a step-by-step ">guide that you can follow for mounting and wiring a King electric heater in your garage.


Before mounting the heater, make sure that you will place the bracket on the optimal spot in the room. Homeowners should install the heater at a level higher than 10 feet or lower than six feet.

The sides of the unit should also be at least three feet away from any walls or cabinets. Choose the coldest area of the room, and install the heater facing away from the wall, furniture, or workstation.

Predrill Holes For The Bracket And Insert Lug Screws

Create pilot holes on the surface where you attach the heater's bracket. These holes are for the lug screws on the back of the bracket. Ideally, do this after deciding where to place the electric heater and before the installation.

Insert the appropriate amount of lug screws into the bracket of the heater. Different unit models of King electric heaters have various numbers of lug screw holes on the bracket, but they aren't less than two.

Place And Secure The Bracket To The Surface

After locating the pilot holes:

  1. Line them up with the bracket holes.
  2. Place the heater exactly in the predrilled holes.
  3. Insert the lug screws through the bracket holes and into the pilot holes.

Secure The Hook And Washer Screw On Top Of The Heater

Place the washer screw and hook firmly before hanging the bracket. Ensure the washer screw is not loose on the top of the heater. 

Hang The Hook On The Bracket

After securing the hook on top of the heater, you can hook it onto the two side screws on the bracket. As mentioned, practice proper precautions when lifting the heater unit on a ladder or any elevated surface. 

Tighten the two side screws with a 3/8 screw socket wrench after attaching the heater unit. After securing the heater unit, connect the wires to the circuit board.


Before touching any of the wires, see to it that the power is disconnected on your breaker board. In addition, it is vital to ensure that the cables you use are up to standard.

Most states require using Romex enclosed in a flexible conduit, but checking your own state's electrical codes is better. After inserting the conduit into the knock-out hole at the back of the unit, secure it with a cable clamp.

You can also attach the flexible conduit to the wall or ceiling surface if the cables extend outward. The cable clamp will hold the conduit in place, avoiding any situation where it can get pulled out from the unit.

Click here to shop for steel cable clamps on Amazon.

King electric garage heater provides a manual with instructions. It would help if you referred to it to determine which cable connects to the circuit board.

The two hot wires connect to the two lugs labeled L1 and L2 on the board. If these cables are stranded wires, you can apply solder to the tips of these cables to clump them together.

How Much Does It Cost To Run A King Electric Heater?

Unrecognisable man using calculator on the phone to calculate expenses

The cost of running a King Electric heater will depend on multiple variables specific to your situation. Like all types of heaters, the cost depends on how much you use them, where you will use them, and the local rates of your area. 

3D Design of Ligh Rise, increase in electricity and economy with euro sign inside a lightbulb

You must figure out the wattage of your unit to get a ">rough estimate of how much you will spend running a King electric heater. Divide the wattage by 1000 to get your unit's kilowatts per hour. Multiply the kilowatt by your local area rate. 

For Example, if you own a 7500-watt King electric heater, take this number and divide it by 1000 to get the kilowatt. You get 7.5 kilowatts, then multiply it by your local rate. If your local rate is 10 cents per hour, multiply 7.5 by 0.10 to get the hourly cost of running your heater unit. 

It is unlikely that your heater will be constantly powered on every hour for a whole day, meaning you only compute the time you have it on. Thermostats control electric heaters as opposed to traditional heat sources. They detect if the machine is supplementing enough or more heat than necessary. 

Factors To Consider When Computing 

The thermostat in your electric heater helps you not worry about spending unnecessary electricity. You can expect at least two hours of run time each day. It's the sum of 10-15 minutes for each cycle.

Below is a list of other important factors to consider when computing the cost of running an electric garage heater.

  • The outside temperature when you will activate the indoor heater.
  • Whether the room is insulated or not. (It also includes what type of insulation you have.)
  • Preferred room temperature. (This affects the heater's running time, affecting the hourly cost.)
  • Area measurement. (Is the size of your heater appropriate to the area of your room? A small heater inside a large room will spend much more energy, resulting in a higher electric bill.)

Read more on how size affects HVCA effectiveness. Does Furnace Size Affect Air Conditioning?

How Loud Is A King Electric Heater?

Well-functioning electric heaters are not loud or noisy, aside from the occasional crackling or popping due to the heat generated in the heater coils. A King heater has a low humming sound of 50 decibels from the fan blades. Get your heater unit checked if it makes loud sounds.

Which Are Better: Electric or Gas Garage Heaters?

Check out this King electric heater on Amazon.

An electric heater is better than gasoline and kerosene solely because the other two diminish the air quality of your living space. Air quality should be one of the most important things to consider when buying a garage heater.

Gasoline and kerosene burn and create poisonous fumes, which can damage your health with constant inhalation. Electric heaters are the best choice when looking for a home heater, especially for rooms you plan on using frequently.

They run on renewable energy and perform best for the user's health and the environment. Unlike gas or kerosene heaters that require refilling before regulating the garage's temperature, electric garage heaters are powered by plugging them into a socket.

A significant downside of an electric heater is the cost. Although electric heaters are efficient, they can cost twice as much as gas ones. Their installation is more cost-effective than gas heaters in the long run.

Should I Insulate My Garage?

Insulated garage attached to new single family residence

Yes, you should. While installing a heater in your garage is an excellent way of providing your space with heat during freezing temperatures, insulation helps trap the warm air from the heater.

Having a heater in your garage benefits you and regulates indoor temperatures. Objects made of metal are susceptible to damage when exposed to cold because the material expands and contracts. While a garage heater is helpful during winter, its results aren't as significant without room insulation. 

To Wrap Up

King electric heaters can heat your garage during the cold season. They come with a bracket and appropriate screws that you will need for installation. Make sure to practice proper precautions when installing a heater at home. If in doubt, seek the help of a professional.

Check out other related posts!

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