Siemens Building Technologies, Inc. has released a new CD-ROM of the Siemens Master HVAC Products Catalog. The new Version 4.0 catalog includes over 700 pages of HVAC control components; valves, actuators, sensors, thermostats, damper actuators, VFDs, controllers, and accessories, and is available available free at www.sbt.siemens.com/hvp/Components/.