The Hot water- Chilled water Air handler

I wrote a handbook for my company when I was a commercial service contractor for about 20 years. Here is an excerpt from that handbook that will probably always be useful because it is about some basic engineering concept. Additions and corrections are welcome.

INTRODUCTION

In buildings supplied from central plants, one service responsibility is the air handler that is used to condition the space, the control system and the piping, usually to the main hot water and chilled water supply and return piping.

The air handler is a box with a fan and motor, supported on spring mounts, helping to isolate the vibration to within the machine, and not transmit it to the building structure.  The components in the box may include an economizer, filters, hot water, steam and/or chilled water coils, and a condensate pan and drain system.  Please Press "Read More"