Air-conditioning technicians agree: For maximum cooling in the home, use two fans to create cross ventilation

Summer continues to bring intense heat, with exceptionally high temperatures expected to move east across the United States. While these heat waves are considered extreme, they have also become increasingly common, making it more important than ever to use home cooling methods as efficiently as possible.

That is especially true for electric fans, which are an essential cooling solution in homes without air conditioning. However, many people use them incorrectly, preventing them from delivering their full cooling potential.

Strategic fan placement

According to HVAC professionals, the best place to position a fan is near an open window or doorway. This recommendation is based on a simple principle: keep the air moving.

Placing a fan in one of these locations helps either draw cooler outdoor air into the home or push hot indoor air outside, depending on the outdoor temperature. If the air outside is cooler than the air indoors, point the fan into the house to pull in the cooler air. If the outdoor air is hotter, reverse the fan so it blows warm indoor air outside instead.

Two fans work better than one

Experts also recommend using two fans to improve air circulation by creating cross ventilation.

Place one fan on the cooler side of the house to bring fresh air inside and another on the warmer side to exhaust hot air outdoors. This setup creates a steady airflow that distributes cooler air more effectively throughout the home.

This method works best only when the outdoor temperature is lower than the indoor temperature, such as during the early morning or at night. In homes with two or more stories, experts recommend exhausting warm air through upstairs windows. Since warm air naturally rises, this allows cooler, denser air to flow into the lower levels of the house.

Getting the most out of a fan

To maximize a fan’s effectiveness, it helps to understand how it works most efficiently.

Experts recommend using a fan primarily to improve ventilation by removing overheated, stagnant air from a room rather than simply directing a constant breeze at a person.

With these simple adjustments, homeowners can reduce indoor temperatures by several degrees while using less energy and, in many cases, without needing to turn on the air conditioner.

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