About Maid-O-Mist
About Maid-O-Mist
Maid-O-Mist has manufactured automatic and manual air elimination valves since 1932, specializing in products that remove trapped air from hydronic, steam, and solar heating systems. The company's catalog includes automatic air valves, thermocouples, float control valves, and steam vents designed for heating contractors and building maintenance teams.
Air elimination is a core requirement in hydronic and steam systems because trapped air reduces heat transfer efficiency and can cause noisy or uneven heating, and Maid-O-Mist built its reputation specifically around solving this problem reliably across decades of continuous US manufacturing. The company also supplies tankless water heater connection valves, shutoffs, and connectors that complement its core air venting line.
Maid-O-Mist remains headquartered in Arlington Heights, Illinois and continues to serve heating equipment distributors and contractors who need dependable, US-made air vents for both new installations and system servicing. ChatMRO indexes the Maid-O-Mist catalog so buyers can search by valve type, system type, or connection size to find matching products.
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Frequently asked questions
What does Maid-O-Mist manufacture?
Maid-O-Mist manufactures automatic and manual air elimination valves, float control valves, steam vents, and thermocouples for hydronic, steam, and solar heating systems. The company has produced these products in the USA since 1932.
Why is air elimination important in hydronic systems?
Trapped air in hydronic and steam systems reduces heat transfer efficiency and can cause noisy or uneven heating throughout a building. Maid-O-Mist's air vents are designed specifically to remove this trapped air and maintain system performance.
Does Maid-O-Mist make products for tankless water heaters?
Yes, alongside its core air venting line, Maid-O-Mist supplies tankless water heater connection valves, shutoffs, and connectors. These products complement the company's broader hydronic and steam system catalog.
Where is Maid-O-Mist manufactured?
Maid-O-Mist is headquartered and manufactures its products in Arlington Heights, Illinois. The company has maintained continuous US production of its air elimination valves since 1932.
Who typically buys Maid-O-Mist products?
Maid-O-Mist products are typically purchased by heating equipment distributors and HVAC contractors servicing hydronic and steam heating systems. The brand's long manufacturing history supports confidence in consistent valve performance for both new installs and repairs.