Editor's note: For the denizens of commercial buildings, comfort cooling is one of life's basic necessities. Without it, we quickly become irritable, lethargic, and unable to concentrate. But the cost ...

The Model HK2000 fresh air intake and economizer panel provides control of residential and commercial heating and cooling systems. In the fresh air mode, the unit has the flexibility to bring in as ...

When I think of economizer circuits for solenoids and relays, I’m reminded of the phrase, “you can’t have your cake and eat it, too.” This phrase comes to mind because if you use a solenoid economizer ...