Drawing on decades of inspections, Peter Hopkins breaks down what thermal cameras actually measure, why they’re safe and how to use them across four high-impact areas: energy loss, HVAC performance, electrical faults and moisture intrusion. Along the way, he offers practical guidance on whether to bring the tool in-house or outsource it – and how to spot a “checkbox” contractor with a cheap camera and minimal training. The takeaway for FMS: the technology is now affordable but the consequences of ignoring it are getting expensive.