Description
Product image is representative only. Actual product may differ in appearance depending on size, configuration, and options selected at order.
Hoyme inline damper body with Belimo LMB24-3-T 3-wire floating point actuator — the lighter-duty companion to the HAC-34 (CMB24-3-T). Same Open / Stop / Close 3-wire control architecture, same holds-last-position behavior on power loss, same 6"–20" size range. The practical distinction is torque: the LMB24-3-T suits smaller and mid-range duct sizes where the CMB's higher torque is not required. When the spec names LMB24-3-T, this is the product.
⚠ No Spring Return — Holds Last Position on Power Loss
On power loss, the HAC-30 blade stays at its last position — it does not move to a defined open or closed fail-safe position. If your application requires the damper to move to a defined position on power loss, use a spring return product: HAC-40 (TFB24) for on/off or HAC-43 (TFB24-SR-T) for modulating.
✓ 3-wire floating point — Open / Stop / Close — DDC controller pulses the Open or Close wire to position the blade incrementally; neither energized = blade holds position
✓ LMB24-3-T — lighter torque class than CMB24-3-T — appropriate for smaller and mid-range duct sizes at moderate static pressure; if in doubt on torque adequacy, specify HAC-34 (CMB)
✓ Belimo LMB24-3-T — factory-mounted to Hoyme damper body — single SKU, ready to install; actuator field-replaceable through Belimo distributors
✓ 24 Vac or 24 Vdc supply — compatible with Johnson Controls, Siemens, Honeywell, Automated Logic, and other BAS platforms with floating point output cards
✓ End switch and heat bypass (-H) available on all sizes — factory-installed; end switch provides definitive position confirmation when blade reaches fully open or fully closed
HAC-30 (LMB24-3-T) — this product
✓Spec names LMB24-3-T or is actuator-neutral
✓Smaller and mid-range duct sizes at moderate static pressure
✓Lower torque class is confirmed adequate for the application
✓Same LMB actuator family as HAC-60 — familiar parts chain
HAC-34 (CMB24-3-T) — use instead when…
→Spec names CMB24-3-T specifically
→Larger duct sizes or higher static pressure applications
→Torque adequacy of LMB is uncertain — CMB is the safer choice
→Over-torquing causes no harm; under-torquing causes missed blade travel
Do not specify -H heat bypass on fresh air intake, make-up air, or ventilation applications. The 10% bypass allows continuous outdoor air infiltration when the damper is at minimum position. Specify -H only for hot air supply duct zone control on single-speed furnace systems.
Control
3-wire floating point — Open / Stop / Close
Fail-Safe
Holds last position — no spring return
Actuator
Belimo LMB24-3-T
Supply Voltage
24 Vac or 24 Vdc
Sizes
6"–20" even inches
Torque
Lower class — confirm for size and pressure
CSA Status
Confirm with Hoyme before ordering
Spec calls for CMB24-3-T, or torque adequacy is uncertain? Use HAC-34 (CMB24-3-T) — same 3-wire floating point architecture, higher torque class. For line voltage floating point (100–230 Vac) see HAC-35 (CMB120-3). For 2–10 VDC modulating with the LMB actuator family see HAC-60 (LMB24-SR-T).
2-year electrical · 10-year mechanical warranty
Hoyme damper body — Made in Canada · Belimo LMB24-3-T field-replaceable through Belimo distributors