Quick reads on variable refrigerant flow systems

1. Variable-refrigerant Flow (VRF) Systems: Weighing Benefits And Limitations Variable-refrigerant flow (VRF) systems have been used for the better part of three decades in Europe and Asia. While clearly not as common in North America, the design has been catching on — mostly for its ability to respond to fluctuations in space load conditions. Because of this, it excels at saving money …

Maintenance Savings May Help Justify HVAC Capital Investments

Once a bundle of projects has been identified, facility managers should also determine whether a reduction in maintenance expenses can legitimately be anticipated. Facility managers should determine if deferred capital renewal should be part of the analysis to justify large energy upgrades. An example of additional maintenance savings that will lower the simple payback is a lighting project that changes …