Remember, you can always search the catalog for books on your topic, but if you want to browse the shelves to see what we have on a given topic, use these call number ranges.
Library of Congress Classification
TH 7005 - TH 7699 / TL 271 General Heating and Ventilation
TH 7466 Furnaces- Maintenance and Repair
TH 7687 - TH 7688 / TL 271 Air Conditioning
TP 490 - TP 498 Refrigeration and Refrigerating Machinery