Lester Terrance has been active in the HVAC industry since 2003, including 12 years in the United State Air Force, seven of those years serving as HVAC Field Supervisor at the US Department of State. He is a licensed Master HVAC in the states of Maryland and Virginia, an EPA Certified Universal Technician, and an Authorized Overseas Certified Technician (Multistack). Lester is an HVAC Instructor and subject matter expert at D+R LEARN.