How Long Should it Take to Cool a House From 80 to 72?

The average person cannot live without some form of climate control, especially in hot climates. There are many reasons why your house is too hot, but the most common causes are a malfunctioning thermostat or heavy insulation. Household thermostats regulate the temperature in a house by measuring humidity and air temperature and turning on the heat as needed to reach a specific temperature.

The average air conditioning unit takes about 2.5 hours to cool a house from 80 to 72 degrees. At most, an AC can take about 3 hours to cool a modern 3-bedroom to 4 bedroom house about 10 degrees. Some of the factors that determine the time taken to cool your house include outside temperature, the square footage of the house, and the performance of your AC.

How Long Does It Take an AC to Cool a House?

Air conditioners (AC) are designed to cool an enclosed space, like an office or a house. When it is not working properly, it can take more than 12 months to cool the space again.

The first thing that you need to do is remove any furniture and electronics that are in direct contact with the floor. This will help the AC work better because they release heat which makes it difficult for your AC to cool your house.

Next, make sure that there are no obstructions on the surface of the AC unit so that air can circulate freely across its coils and condenser coils.

You also want to make sure there’s nothing blocking the airflow of your AC’s vents so you’ll want them pointing down instead of just laying on a flat surface or pointing up into a corner.

Why does it take longer to cool down a house?

A house, like any other closed space, can be considered an insulated container; it will require the same amount of energy (work) to cool it back down to its original temperature.

The difference is that while a box of air close to your skin will only require the same amount of work (energy) for you to cool down, your house requires more energy because there’s more matter inside; this means there are more walls and ceilings in contact with the air inside.

Tips for Quick Cooling of the Home

The days are getting hotter and hotter, meaning that cooling off can be difficult. There are a few ways to cool down your home without breaking the bank.

The first thing you should do is find out if your home has any kind of insulation or sealant that needs to be fixed. Seal up any cracks in the foundation, insulated pipes, replace old insulation in the attic, install weather stripping around doors and windows, check for air leaks in the attic or basement, place an air conditioner at the opposite end of the house to help cool it down.

Is Air Conditioning Really Necessary?

Air conditioners are an important accessory in homes and workplaces. The working environment of someone is directly affected by the temperature, and an air conditioner can make a workplace more comfortable.

Air conditioners also help save energy costs by running the air conditioner for shorter periods of time which is more efficient than running air conditioning on a continual basis. This way, you aren’t using as much energy to cool the place down.

How to Maintain Your Air Conditioner

An air conditioner requires regular maintenance to help you regulate temperatures in your home. Some of the things you should do to ensure the AC is in proper working condition include:

Change air filters

Air filters may get clogged by dust and debris trapped by the air conditioner. This clogging hinders airflow, and it can force the AC to work much harder to cool your home. To keep the AC in its top performance, you should replace the air filters frequently.

Checks leaks

If the AC has leaky ducts, they could be allowing air to escape in unconditioned rooms in your house. Energy Star estimates that leaky ducts account for about 20 to 30% of air lost in the house, which means that your home will take longer to cool off.

Hire a skilled technician

While it is possible to watch AC maintenance YouTube videos, you should hire a skilled technician to inspect your AC for any faulty parts. The technician can help you repair any leaks and replace the air filters before your energy bill hits its peak.

How Long Does the Average A/C Unit Last?

The average lifespan of an air conditioning unit is between 10-12 years. This is because air conditioning units are subjected to severe weather conditions and the heat they produce can shorten the lifespan. There are some great models that have a lifespan of up to 20 years, but these are much more expensive.


If your air conditioner is taking too long to cool your home, you should try to find out if it is faulty. Common issues such as blocked air filters and leaky ducts can slow down the performance of your AC, and it can prolong the duration it takes to cool down your home in extremely high temperatures. At normal working conditions, your AC should cool down your house from 80 to 72 within 2.5 hours, or at most 3 hours. If takes longer, maybe it’s time to call your technician for a quick inspection.

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