Residential HVAC System Cheat Sheet HVAC Investigators
Hvac Serial Number Cheat Sheet. Web to determine the age of an hvac system or water heater, begin your research by locating the brand name and serial number on the. Web 7th thru 13th digits = unit identity #.
Web 7th thru 13th digits = unit identity #. Web to determine the age of an hvac system or water heater, begin your research by locating the brand name and serial number on the. 14th & 15th digits = factory code (01=oh;
Web 7th thru 13th digits = unit identity #. Web 7th thru 13th digits = unit identity #. Web to determine the age of an hvac system or water heater, begin your research by locating the brand name and serial number on the. 14th & 15th digits = factory code (01=oh;
