A window fan is efficient and cost-effective way to keep your house cool during hot months. In many climates air conditioning isn't needed most of the time. But during the summer, it is useful to have window fans that keep the air circulating so that heat doesn't build up in rooms or spots that don't get regular breezes.

Some of the newer models have thermostats. During the evening if the room cools the fan automatically shuts off. If you leave the fan on during the day, it will automatically turn on at the hottest times. So when you come home the air in your house will be cooler and fresher.

You can also carry a window fan from room to rooom. If you're cleaning with strong chemicals, it really is important to have good ventilation. A window fan can bring in fresh and clean air, while carry out potentially dangerous fumes. Or if your in the kitchen cooking with strong spices such as ginger or curry. Slip the window fan in and the rest of your house won't smell like an Indian restaurant.

I really like the fact that the Holmes Twin Window Fan has a thermostat. So that when the room cools down it shuts off. Then when the heat builds back up it comes on again. It's a economical energy saver. Plus, when you come home in the evening, you'll come home to a cooler and fresher house - without the cost of air conditioning.

With the twin fan you can both draw in fresh air and take out the stale or warm room air. Two speeds are available as well as temperature selection. It wil fit most types of windows including double-hung, vertical slider, and casement windows measuring 24 to 37 inches. Extenders allow you to custom fit your window. The Holmes Twin Window Fan is 12.25 inches tall.

If you love the convenience of remote controlled appliances they you should really check out this Bionaire Twin Window Fan. Each fan can be set independently so one fan can bring in cool air, while the other fan acts as an exhuast fan. Three fan speeds are available. Simple to operate with LED screen and remote control. Extenders allow you to easily fit most windows - double-hung, sliders and casement windows 24 inch to 37 inch. Fan is 13 inches high.

This Bionaire Window Fan has a convenient LED display that will show the current room temperature as well as the desired room temperature. The fans can be set independently so that one can bring in cooler fresh air while one pulls out the warmer room air. Or they can both be set to blow cool air in or act as a powerful exhaust fan.

You'll have a digital thermostat to precisely set your desired temperature. If you change your mind there's a remote control so there's no need to get up or get out of bed. The Bionair Window Fan fits into double-hung windows, sliders, and 24-inch to 37-inch casement windows.
The thermostat saves energy by shutting of the window fan when the room has reached the desired temperature. So you won't end up freezing in the middle of the night.

Window Fan is 13 inches high.

You can adjust the grills on this Honeywell Window Fan so that the air will blow into your room in just the righ direction. The grills also come off for easy cleaning. You also have three motor speeds to adjust the breeze blowing into your room. Fits almost all windows. Adjustable side screens keep out dust and bugs. Rain resistant motor.

The fans can work in opposite directions at the same time, so you can bring in fresh air, while removing stale odors or warm air.

If you want a large and powerful fan capable of blowing a breeze through several rooms, give the Lasko 16-inch Window Fan a try. It's also a grate choice if you sometimes need a powerful exhaust system. If you're a crafter, working with strong glues and markers this could be you!

The Storm Guard lets you close the window behind the fan for safety and security.

Full-steel construction make this a sturdy and reliable fan. Extender panels provide a safe and easy custom fit. You can either bring fresh air in or pull out stale air, because the fan reverses electronically. It's a very large and power 20-inch fan. Storm Guard feature allows you to close the window behind it during severe weather. Or for security when you leave home.