Technical Reference Guide eBook – 2022 9th Edition
NEW 2022 – 9TH EDITION OUT NOW WITH 50 CHANGES AND ADDITIONS. This pocket field guide that helps you identify the age and capacity of residential and commercial heating and cooling systems, domestic water heaters, pumps and more. Available as a downloadable electronic PDF eBook.
When you have a heating or cooling question, don’t guess! The Technical Reference Guide decodes model numbers and serial numbers to help you make an accurate evaluation. This pocket guide tells you the age and capacity of hundreds of residential and commercial heating and cooling systems.