Since the Covid pandemic, indoor air quality (IAQ) is no longer an afterthought. Facility managers, engineers, and building owners are putting clean, healthy air at the top of their priority lists—alongside energy efficiency, smart controls, and long-term system performance. At VHF, we’re seeing two technologies consistently come up in these conversations: ✅ UV-C disinfection by Evergreen UV ✅ Variable frequency drives (VFDs) by Invertek Drives These aren’t just upgrades—they