Thermal Zone, Definition
Sierra Heating and Air Conditioning - Serving Chico, Paradise and Yuba City
An individual space or group of neighboring indoor spaces that the HVAC designer expects will have similar thermal loads. Building codes may require zoning to save energy in commercial buildings. Zones are defined in the building to reduce the number of HVAC subsystems, and thus initial cost. For example, for perimeter offices, rather than one zone for each office, all offices facing west can be combined into one zone. Small residences typically have only one conditioned thermal zone, plus unconditioned spaces such as garages, attics, and crawlspaces, and basements.
About Sierra Heating and Air Conditioning
- Your Heating and Cooling Professional
- Professional Installers
- 24-Hour Emergency Response
- Complete Installations and Retrofits
- Experienced HVAC Professionals Dedicated to Quality
- Professional Consultants – Timely Estimates
- Service After the Sale

It has been our pleasure to serve this community since 1972. Since the very beginning our team of professionals have dedicated themselves to being knowledgeable about heating and air conditioning products, to bring you quality installation and courteous, friendly service after the sale.
We are committed to meeting your comfort equipment needs and to keep your system running reliably and efficiently for years and years. With professional technicians we are your first choice to meet your indoor comfort needs. We know that having the right people on the job is just as important as choosing the best equipment. Our trained professionals provide you with top quality equipment, skilled installation and an expert analysis of your comfort needs. Our recommendations will fit your budget and lifestyle needs.






