Spring Isolator Selection for VAV
VAV boxes may need vibration isolation. Wrong isolator causes noise transmission.
What You Might Be Looking At
VAV box mounted on springs or rubber pads above ceiling
Apprentice words: rubber pad under VAV, vibration pad, spring under box, noise pad
Trade terms: spring isolator, vibration isolator, neoprene pad, vibration mount
Check First
What Not To Do
Don't omit isolators where spec requires them. Don't use wrong isolator type. Don't exceed isolator load rating.
What can go wrong: Noise transmission to occupied space, vibration damage to ceiling, isolator failure, re-work
Better Foreman Question
For this VAV, what isolator type and load rating does spec require? Is deflection limited?
Verify With
Reference type: project specs, manufacturer data
Source to verify: Vibration isolator manufacturer catalog, project specification Section 23 05 00
Safe wording: Vibration isolation requirements vary by equipment type, weight, and project specs.