Pressure independent control valves (PIV) stabilize variable flow hydronic systems for a lifetime of efficiency and worry-free dynamic balancing. PIVs directly control the water flow required by the coil or a branch and are not affected by pressure fluctuations in the system. The valves are selected based on the flow requirements of the coil or branch, and no Cv calculations are needed. By precisely controlling the flow, the pressure independent valves eliminate the need for balancing valves, thus reducing installation costs. The most significant benefit comes in energy savings by eliminating overflow through the coil or branch. Overflow wastes pumping energy and is the leading cause of low Delta T syndrome in chilled water systems. With Belimo's pressure independent valves, every system performs to its full potential – saving time, money, and other precious resources.

ASHRAE’s newly renovated global headquarters in Peachtree Corners, Ga., will showcase the latest HVAC equipment and technology offered by Belimo. The building includes design and renovation updates to achieve a net-zero energy-efficient workplace environment. 

Those seeking comfort will find it at Assisi Heights in Rochester, Minnesota. For many years, that wasn’t the case. The Sisters of St. Francis of Rochester and others who lived, worked, and taught at the historical convent, did so without air conditioning and a very outdated steam heating system. Many of the pneumatic actuators throughout the steam system were in disrepair.

Indoor air quality (IAQ) and its effect on occupant well-being and comfort are essential. Many issues such as sick building syndrome, indoor air quality thermal comfort, visual comfort, and acoustic comfort are a part of the indoor environment. Good indoor air quality requires attention to the building's HVAC system, measure and monitoring, healthy indoor air, air filtration, and pollutant source management. Some good practices in these areas have also been highlighted.

Airside Economizing is a great way to reduce operating costs; it also provides the correct ratio of outside air and return air to deliver the proper indoor air quality (IAQ) to meet the codes and provide occupant comfort. Many commercial building owners are paying too much for utility bills and are looking at ways to cut costs. HVAC economizer can make a difference in energy costs.