Are you wondering about How much Electricity Does an Ac Use – AC unit is a higher air consumption electronic appliance in our home. When you look for your monthly electricity bills in hot summers and humid climates, it must be a significant number. Your electricity bills must be in a higher range when your air conditioner unit is in substance use.

The present article is all about how much electricity does an AC use. We have specially availed some rough numbers and estimated usage with the factors responsible for your AC unit‘s significant electricity usage.

How much electricity does an AC use- a rough estimation?

How much Electricity Does an Ac Use

Many variables can impact your air conditioner’s energy efficiency and electricity usage. As such, going with the precise calculations for your home may differ due to your different units and style of the AC. It has been believed that other and different AC unit models have slight variables in electricity usage.

Let’s look into the different types of electricity used as per various types of the model. Scroll down to know more about How much Electricity Does an Ac Use.

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How much electricity is used by a central AC unit?

This is the most common type of Air Conditioner, which is mainly seen in more significant and giant buildings.

On average central air conditioner uses between 3000 and 3500 watts per hour during the warm months. Air conditioners in Phoenix and other hot climates can run at that level for much of the year. However, if you’re running your central air conditioner on ‘fan only’ mode, energy usage drops to around 750 watts per hour.

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How much electricity is used by a portable or compact AC unit?

The most common second type of AC unit is the most modular and compact portable AC unit.

Medium-sized portable air conditioners use an average of 2900 watts per hour. Substantial units can exceed the electricity usage up to even central air conditioners, expending an estimated 4100 watts per hour. 

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Window Air Conditioner electricity usage

We are coming to the third most common type of Air conditioner unit, the window unit, used for a single room or a medium-sized room for cooling.

A window air conditioner uses approximately 900 watts per hour. You’ll find about 500 watts per hour on the smaller side, while larger units use 1440 watts.

6 common Factors affecting an Air Conditioner electricity use

How much Electricity Does an Ac Use

There are a few factors that affect an electricity usage of an Air conditioner unit at your home. We have concise the most common 6 significant factors which directly affects an Air conditioner electricity use at your home. They are as follows-

The capacity of an Air conditioner unit

Air conditioner capacity is, unsurprisingly, the most significant determinant of energy usage. Professional measure capacity based on British thermal units, which are most precise. Generally, one needs about 20 BTUs per square foot, adjusted for your local climate and home’s conditions. The larger your home or room, the more the cooling capacity required, and the more energy you’re going to spend subsequently.

Efficiency rating of an Air conditioner

Of course, not all air conditioners that provide an appropriate number of BTUs will operate at the same efficiency. Air conditioners come with some precise known as a Seasonal Energy Efficiency Ratio (SEER) rating and other rating. These ratings generally represent the cooling output ratio per season divided by the number of watts used per hour. The higher your air conditioner’s SEER and other ratings, the more efficient it will be.


The season is the most common factor affecting the electricity usage by your air conditioner. The more humid and moister season, the more the AC unit has to work hard to cool and dry the room’s air. As per the harder work, the electricity usage will be more too.

The temperature setting of Air conditioner unit

A straightforward way to improve air conditioner efficiency is by maintaining consistent temperature settings throughout the day and not changing the variables now and then. Some manufacturers also recommend keeping the unit set to 23 degrees, which is often the default temperature. Setting your air conditioner lower or altering its temperature at varying times in the day can lead to higher energy usage. It can also affect the efficiency of your Air conditioner unit.

Insulation of your home

A properly insulated home makes your air conditioner’s job much easier by not allowing cold air to escape properly. One should pay special attention to your insulation if you live in an older home, as these tend to be subpar in this department.

Frequently Asked Questions

Question 1 – What is the perfect Maintenance routine of an Air conditioner in 2022?

Answer – Regular maintenance routine and periodic services are very effective for one to cut down their unnecessary electricity usage. Due to the regular maintenance, there will be no reason or subsection of any clogged or damaged filters or ducts, sot the unit will be working as per its most entire efficiency. So, it is highly recommended that your AC unit be availed of regular or periodic services and go for the professional maintenance routine.


While air conditioners are reasonably energy-intensive, their exact energy usage depends on several factors. However, one can expect a central air conditioner to use between 3000 to 3500 watts per hour. Portable units use between 2900 to 4100 watts per hour, while window units range between 900 to 1440.

Read the above article on how much electricity does an AC use and avail the information.

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