How many BTU do I need for a 2 car garage?

Author: Herminia Cartwright MD  |  Last update: Friday, January 2, 2026

For a 2 car garage with 500 sq ft to 700 sq ft, the estimated heater size is 30,000 to 45,000 BTUs. For a 3 car garage with 750 sq ft to 900 sq ft, the estimated heater size is 45,000 to 55,000 BTUs. The height of your ceiling will impact the size of the heating unit you get.

Is $12,000 BTU enough for a 2 car garage?

Here's a rough guide to determining the BTU requirement based on your garage's size: One-car garage (150-300 sq ft): 6,000 – 9,000 BTUs. Two-car garage (400-600 sq ft): 9,000 – 12,000 BTUs. Three-car garage (600-900 sq ft): 18,000 – 24,000 BTUs.

How many square feet will a 50,000 BTU garage heater heat?

30,000–50,000 BTUs: Suitable for spacious garages or workshops (900 to 1,500 square feet) and provides high heating capacity for colder climates or larger, less insulated areas.

How big AC for a 2 car garage?

ft., and a two-car garage is 350-450 sq. ft. For a 150-250 sq. ft garage, 8000 BTU is needed to cool a garage, while a two-car garage requires 10000-12000 BTU.

How many BTUs to heat a 40x60 shop?

To heat a 40×60 shop, which is 2400 square feet, you'll typically need between 108,000 and 132,000 BTUs.

How many BTU do I need for a 2 car garage?

How many BTU is needed for a 2 car garage?

What is the right size garage heater for a two car garage? To heat an average two car garage, you'll need a garage heater that is capable of heating roughly 6,000 - 9,000 cubic feet of air. We recommend getting a 30,000 - 50,000 BTU garage heater to get your two car garage to a comfortable temperature.

Is it worth putting AC in a garage?

Extreme temperatures can affect your comfort and damage vehicles, tools, and stored items. So, even if you do not plan to transform your garage into a living area, it may still be a good idea to ensure it is adequately air-conditioned and ventilated to prevent damage to your cars, tools, and other personal items.

Will a 20x20 garage fit 2 cars?

A 20×20 two-car garage is sufficiently large enough to park two vehicles, but you won't have much extra room for storage.

Can a heater be too big for a garage?

A garage heater that is too large for the space will not heat the space more quickly. A heater that is too large for the room will continue to heat for an extended period of time beyond the temperature set point, wasting energy. We call this a temperature swing.

How many BTUs do I need to heat a 20x20 garage?

For a 1 car garage with 200 sq ft to 300 sq ft, the estimated heater size is 15,000 to 25,000 BTUs. For a 2 car garage with 500 sq ft to 700 sq ft, the estimated heater size is 30,000 to 45,000 BTUs. For a 3 car garage with 750 sq ft to 900 sq ft, the estimated heater size is 45,000 to 55,000 BTUs.

How many sq ft is a 2 car garage?

The average sized 2 car garage's square footage usually ranges from 400 (20×20), 576(24×24), and 720 (24×30) square feet.

Will a portable AC cool a garage?

Portable air conditioners can rapidly bring down the temperature in a garage. They are ideal for situations in which you need only a modest amount of cooling.

What size heat pump do I need for a 2 car garage?

Because a two-car garage has larger square footage, usually 500 feet or more, you'll need a 12,000 BTU system.

What is the cheapest way to climate control a garage?

Using air conditioning in the garage might also be too cost prohibitive for your liking. One of the cheapest garage cooling solutions you can use that's still effective is a simple oscillating household fan. Pedestal fans, box fans, or (even better) a higher powered shop fan will get the air in your garage moving.

How to ventilate a garage with no windows?

Floor fans: Floor fans are an easy option to keep your garage ventilated with fans. Chances are you have a spare floor fan sitting around at home. If not, you can purchase one without spending too much money. Place a floor fan facing your open garage door to ventilate your windowless garage.

What type of AC is best for a garage?

A ductless mini split AC unit is the best choice for a garage because it is very energy efficient and eliminates energy loss concerns, especially in garages without windows. Choose a mini split for optimal performance.

Is $12,000 BTU enough for a garage?

One-car garage (200-400 sq ft): 9,000-12,000 BTU. Two-Car Garage (400-600 sq. ft.): 12,000-18,000 BTU. Three-Car Garage (600-800 sq.

How to cheaply heat a garage?

The most cost-effective method to heat a garage is often through insulation and sealing gaps first, as this reduces the amount of heat required. Once that's done, portable electric heaters have the lowest initial cost outlay.

Is a 1500 watt heater good for a garage?

The Tradesman 1500 provides radiant heat energy, which instantly warms people and solid objects within the beam of heat. It is ideal for patios, balconies, workshop, garage, etc.

How much does a 40x60 shop cost?

The average installed cost of a 40x60 metal building is $57,600 to $91,200. This includes an average cost for the steel building kit package at $40,800, the concrete slab foundation at $14,400, and construction at $18,000. Your budget should also consider doors, windows, and insulation if necessary.

How much does it cost to insulate a 40x60 shop?

Final Cost of Insulating a 40'x60' Steel Building

After you factor in the costs of materials and the costs of construction, you'll find that it will run you between about $2,400 and $6,600 to insulate your 40'x60' metal building.

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