Description
Product image is representative only. Actual product may differ in appearance depending on size, configuration, and options selected at order.
⚠ NOT CSA CERTIFIED — Read Before Ordering
The HAC-FS is not CSA certified. If your project requires a CSA-certified flue damper — permitted residential or commercial installation, AHJ sign-off required, building inspection — order the HAC-F Large Diameter, not the HAC-FS. Confirm certification requirements with the AHJ before ordering this product. If there is any uncertainty, order the HAC-F.
Same hardware as the HAC-F Large Diameter — Belimo TFB24 actuator, Power Close / Spring Open fail-safe, relay and end switch included on every unit. The single difference is CSA certification: the HAC-FS does not carry it. For applications where certification is genuinely not required by the AHJ. Available in even sizes 14"–30".
Use HAC-FS when…
✓AHJ has confirmed no certification requirement — ideally in writing
✓Private or industrial facility — no AHJ verification or inspection
✓Non-permitted replacement of existing non-certified equipment
✓Certification requirement has been confirmed as not applicable — in writing if possible
Use HAC-F Large Diameter when…
→AHJ requires CSA certification on flue damper
→Building permit or inspection will verify equipment
→Residential or commercial permitted installation
→Unsure whether certification is required — order HAC-F
Appliance interlock is required regardless of certification status. The appliance must not fire until the end switch confirms the HAC-FS is in the spring-open (flue clear) position. Operating a motorized flue damper without ADP relay adaptor interlock is a safety risk regardless of whether the product carries a certification mark. Relay and end switch are included on every unit — use them.
✓ Same hardware as HAC-F Large Diameter — Belimo TFB24 actuator, Power Close / Spring Open fail-safe, relay and end switch on every unit
✓ Spring Open fail-safe — flue path is clear on any power loss; spring operates without electricity, without control signal, without BMS
✓ Belimo TFB24 field-replaceable — stocked through Belimo distributors; actuator replaces without removing the damper body
✓ Starts at 14" — the 10" and 12" sizes are only available as the certified HAC-F; HAC-FS covers 14"–30"
✓ Select diameter only — all other options identical on every unit; no configuration required
Certification
NOT CSA CERTIFIED
Sizes
14"–30" even inches
Actuator
Belimo TFB24 — 24 Vac/dc
Fail-Safe
Spring Open — flue clear on power loss
Action
Power Close / Spring Open
Included
Relay + end switch on every unit
| Size | Part Number | CSA Status | Action | Relay | End Switch |
|---|---|---|---|---|---|
| 14" | HAC-1441-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
| 16" | HAC-1641-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
| 18" | HAC-1841-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
| 20" | HAC-2041-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
| 22" | HAC-2241-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
| 24" | HAC-2441-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
| 26" | HAC-2641-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
| 28" | HAC-2841-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
| 30" | HAC-3041-SPCFS | NOT CERTIFIED | PC / Spring Open | Included | Included |
Select diameter only — all other options identical on every unit. For 10" and 12" certified sizes see HAC-F Large Diameter.
Need an ADP relay adaptor? Interlock is required regardless of certification status. Select by appliance voltage: ADP-0MV2-S5A (millivolt), ADP-0240-S5A (24 Vac furnace), ADP-1102-S5A (110 Vac boiler/tankless). Need the certified version? See HAC-F Large Diameter.
2-year electrical · 10-year mechanical warranty
Same hardware as HAC-F Large Diameter · Belimo TFB24 field-replaceable