Joshua Griffin is a licensed master HVAC contractor based in Hartfield, Virginia. He is host of the YouTube channel HVAC Guide for Homeowners and author of New HVAC Guide, an online guidebook available at NewHVACGuide.com.
Featured Expert: Joshua Griffin| February 23, 2026
Homeowners rarely give their heating, ventilation and air-conditioning (HVAC) systems much thought—until they wake up one morning to unexpectedly uncomfortable temperatures. When an HVAC system...
