Inside the real-world headaches, maintenance procedures, and wins of Variable Refrigerant Flow (VRF)/ technology.

FlexGen’s latest software feature delivers real-time, single-line visibility into battery sites — enabling faster response to alarms, less downtime, and improved operational efficiency.

 Select a relief valve suitable for the refrigerant.  Install the relief valve so that it will be exposed to refrigerant vapor (e.g., above the liquid level).  Install the relief valves where they ...

We tested nine units in a humid Florida home to find the best portable air conditioners of 2025. Here are the models we recommend considering for any size space.