Therma-Stor
Therma-Stor LLC is a Madison, Wisconsin-based manufacturer of dehumidification, humidification, restoration equipment, and accessories.
Last updated September 10, 2026
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Overview
Therma-Stor LLC, located in Madison, Wisconsin, was established in 1977 to apply advanced heat transfer technologies to residential and commercial markets. Beginning with heat recovery water heaters, it now manufactures Quest agriculture and industrial dehumidifiers and Phoenix dehumidification equipment for restoration, air scrubbing, water extraction, and evaporative drying. Its product range covers commercial, industrial, and agricultural dehumidification, humidification, restoration equipment, and accessories.
History
Therma-Stor LLC, located in Madison, Wisconsin, was established in 1977 to apply advanced heat transfer technologies to residential and commercial markets. Beginning with heat recovery water heaters, Therma-Stor now manufactures Quest agriculture and industrial dehumidifiers and Phoenix dehumidification equipment for restoration, air scrubbing, water extraction, and evaporative drying. Effective September 1, 2025, Therma-Stor will no longer be offering unit repair. Santa Fe products are now being supported by the sister company Research Products.
Products and positioning
A family of brands driven by performance and powered by design, focused on indoor air quality and climate control.
Quest agriculture and industrial dehumidifiers
Phoenix dehumidification equipment
Heat recovery water heaters
MERV-13 filters and monitoring devices
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