Spring Deflection Sizing: When to Use 1", 2", or 3" Mounts
Match static deflection to disturbing frequency with fn = 3.13/√δ: the RPM tiers, a worked example, VFD turndown, and sizing to the load at each mount.
Read MoreNoise Control
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Every Custom Curb article tagged Noise Control, newest first.
Spring Isolation vs. Rubber Isolation: Which One Belongs Under Your Rooftop HVAC?
Springs deflect inches, rubber pads a fraction of one. How deflection sets isolation efficiency, and which method belongs under a rooftop HVAC unit.
Read MoreWhat Is a Spring Isolation Curb?
A two-piece roof curb that carries a rooftop HVAC unit on steel coil springs: how it differs from a standard curb, why RPM sets deflection, and when to spec it.
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