Aprilaire: Our History

People have always wanted to be comfortable and healthy indoors.

From living in cooled caves,to building cabins shaded by trees, to installing air conditioners in homes—the pursuit of a better living environment has consistently been a part of human life. The only thing that changes is the technology.

Let’s take a look at the history of Aprilaire, our technology, and how we’ve continued to improve the health and comfort of people’s homes.

The Beginning

Our story began in 1938 with the formation of Research Products Corporation, the parent company of Aprilaire. We started up in Madison, Wisconsin after former employees of the Burgess Battery Company purchased patents and buildings from their old employer with the goal of specializing in building materials and products that condition water.

These products increased in demand during wartime in the early 1940s and allowed the company to expand. But shortly after the end of WWII, a new direction was needed.

From Water to Air

Starting in 1954 the company switched some of its focus to indoor air quality by introducing the first truly effective whole-home humidifier. This was a game-changer for Research Products and for homes across the country.

Living in Wisconsin where seasons can be harsh, Research Products employees experienced and sympathized with the effects of dry winter air. That led to the creation of humidification solutions, which became the first indoor air quality products branded with the Aprilaire name.



The humidifier became popular quickly. Shortly after its introduction, the company expanded into more buildings in Madison and purchased land about 25 miles north in the village of Poynette, Wisconsin.

It was also around this time that Research Products began looking for other areas of investment. In 1963, they were awarded a patent for an air-to-air solar heating system, later called SunCell. This forward-thinking approach has stayed with the Aprilaire brand ever since, influencing expansion past humidity control into all aspects of indoor air quality.

New Technology and Rebranding

In 1989, Aprilaire introduced the first automatic humidifier control, setting the stage for modern humidistats and many of the digital controls available today.

In 2000, all installed air quality products would bear the Aprilaire name.

Aprilaire continued to perfect and innovate with products like air purifiers, ventilation systems, temperature control units, and dehumidifiers. Plus, a full line of humidifiers for a range of different applications.

Today and Tomorrow

Aprilaire is still based in Madison, Wisconsin, and employs hard-working people all across the country. We remain committed to providing innovative indoor air quality solutions through research, engineering, product refinement, and practical experience.

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