Description
Unico M4860BL2-EC2 — Variable-Speed ECM Blower for 4–5 Ton SDHV Systems
The M4860BL2-EC2 is Unico’s flagship 4–5 ton blower module, engineered for precise, quiet comfort in space-challenged homes and premium retrofits. Its EC motor and SCB deliver constant-airflow control across changing static pressures, with laptop (USB) programming to dial in airflow for AC, heat pump, hydronic or chilled-water applications.
Why pros and homeowners choose it
- ECM + SCB: smooth, efficient airflow with soft-start/soft-stop and constant-airflow logic.
- Installer-friendly: separate control box, screw terminals, integrated transformer, and USB configuration.
- IAQ & accessories: humidifier compatibility, fan-cycling EAC/ERV/HRV relay, chilled-water relay, and potable-water circulation.
- Hydronic & heat pump ready: boiler relay and heat-pump AFS bypass built in.
- Comfort advantage: EC systems can remove up to 4× more humidity versus baseline approaches, helping reduce clamminess at lower fan sound levels.
- Modular design: pairs with Unico 4860 coils (DX/heat pump, hydronic, chilled water) and standard 2″ outlets for SDHV layouts.
Toronto & GTA Unico installation
We design, install, and commission Unico SDHV systems for heritage homes, custom builds, and space-tight retrofits. Our workflow covers Manual J/S/D, outlet/sound-attenuator layout, coil pairing, and SCB laptop setup. Need full-scope HVAC? Explore our HVAC Services Greater Toronto.
What’s included
- M4860BL2-EC2 blower module (4–5 ton)
- S.M.A.R.T. Control Board (SCB) with USB connectivity (Windows programming)
- Installer terminals and integrated control transformer
Compatible components
- Unico 4860 refrigerant coils (R410A heat pump/AC) and hot-water/chilled-water coils
- Unico SDHV accessories: 2″ supply outlets, sound-attenuator tubing, plenums/returns
Specifications
| Tonnage | 4.0–5.0 ton (M4860 platform) |
| Voltage | Multi-voltage 120/208/230V, 1-phase, 60 Hz |
| Motor/Control | Variable-speed EC motor + SCB (constant-airflow, USB programmable) |
| Orientation | Left-hand (BL2); right-hand versions available |
| Install orientation | Horizontal or vertical upflow |
| Construction | Balanced blower wheels; direct-drive; modular cabinet; separate control box |
| Integration relays | Boiler, chilled water, EAC/ERV/HRV, potable-water circulation |
| Other features | AFS bypass (heat pump), low-airflow indicator, adjustable low-airflow & ventilation modes |
| Compliance | Meets DOE SDHV requirement of ≥1.2″ w.c. external static at rated airflow (with matched coil) |
| Typical size/weight | ~16″ × 42″ × 20″; ~73 lb (model family reference) |
Planning a system?
Pair this blower with a matched 4860 coil and an outlet layout designed for SDHV. For an example Toronto install—and to compare sizes—see our unico blower module Toronto page.
Get a fast Unico installation quote
Serving Toronto, Markham, Mississauga, Vaughan, Richmond Hill, North York, Scarborough, Etobicoke, Brampton, Pickering. Call 416-335-0881 or request a site visit today.
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