Try a catalogue search using these terms:
blueprints | gas appliances |
HVAC | heat pumps |
plumbing | hydronics |
septic tanks | irrigation - management |
welding | water treatment |
If you're only looking for DVDs you can limit your search to the video collection.
TD - Environmental technology. Sanitary engineering.
TH - Building construction.
TJ - Mechanical engineering and machinery.
Accessing the library collection: