Founded in 1926, Kato Engineering is now part of Nidec and manufactures Kato Engineering branded electric generators / alternators, energy storage products and specialty electric motors in its facility in North Mankato, Minnesota. KATO has a reputation for designing specialty products for the most difficult applications and environments. The KATO name has become synonymous with dependable and high-quality power generation worldwide.

The Energy Conservatory (TEC) is a renowned manufacturer and seller of the Minneapolis Duct Blaster and Blower Door, TEC WiFi Link, digital pressure and flow gauge, TrueFlow Meter and distributor for Flir IR cameras. TEC continues to set the standard for specialized air flow and pressure measuring devices used to monitor and analyze the complex interactions which determine building performance.