Learn what CFM means in HVAC, why it matters for airflow and comfort and how to choose exhaust fans and ERVs that boost comfort and efficiency.

The mathematics for properly designing ventilation and emission control systems have been around for quite awhile, but our studies of hundreds of systems show that many are wasting energy, while still ...

The volumetric efficiency table is probably the most important one in any ECU.The vertical axis is engine load, in this case, MAP, manifold absolute pressure, which is the pressure inside the intake ...

This is a preview. Log in through your library . Abstract In order to improve the volumetric efficiency of a crankcase-supercharged 4-stroke cycle engine in the high speed range, rotary disc valves ...