It's been proven that a cold-air intake system adds power, but, if you're building a system for scratch, how large does it need to be? Years ago, I talked with old-time Mopar Super Stock racer John ...

ATLANTA — A new duct sizing calculator from ASHRAE and the Air Distribution Institute (ADI) allows HVAC air distribution system designers to more accurately size ducts, especially flex ducts under ...

When selecting inverter driven systems, the contracting community tends to ignore sizing issues because the popular belief is: The system will run only as necessary — you can’t oversize. Nothing could ...