Siemens releases new HVAC Master Products Catalog.

New! HVAC Master Products Catalog 6.0. The Siemens HVAC Master Products Catalog has been fully revised and released to our customers. The HVAC Master Products Catalog contains updated information and part numbers for all of the Siemens HVAC components that you know and trust. Also new this year is a "Green" section with icons denoting products that might contribute to LEED Credits.