Description
Unico M3642BL2-EC2 — Variable-Speed ECM Blower for 3.0–3.5 Ton Unico Systems
The M3642BL2-EC2 is Unico’s modular blower for the 3–3.5 ton platform, delivering quiet, precise airflow and constant-airflow performance across changing static pressures. The integrated S.M.A.R.T. control board (SCB) is USB-programmable from a Windows laptop, making commissioning fast, consistent, and traceable.
Why pros and homeowners choose it
- Variable-speed EC motor + SCB: smooth starts/stops, efficiency, and accurate airflow targets.
- Constant-airflow control: helps maintain comfort and sound levels as conditions change.
- USB programming (Windows PC): set modes and airflow with a laptop for a perfect hand-off.
- Modular construction: pair with Unico 3642 coils (DX/heat pump, chilled water, hydronic) to match the application.
- Service-friendly: easy motor/blower access and point-to-point terminals reduce install time.
- Left-hand orientation: BL2 is LH; right-hand versions (BR*) are available if your duct layout needs it.
Toronto & GTA HVAC 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 design, outlet layout & sound attenuator planning, coil pairing, and SCB laptop setup. Need full-scope HVAC? See HVAC Services Greater Toronto.
What’s included
- M3642BL2-EC2 blower module (3.0–3.5 ton), left-hand orientation
- S.M.A.R.T. control board (SCB) with USB connectivity
- Installer terminals & integrated control box
Compatible components
- Unico 3642 coils: refrigerant (R410A heat pump/AC), chilled water, or hydronic, depending on project needs.
- SDHV accessories: 2″ supply outlets, sound attenuator tubing, supply plenum kits, return packages.
Specifications
| Tonnage | 3.0–3.5 ton (M3642 platform) |
| Voltage | Multi-voltage 120/208/230V, 1-phase, 60 Hz |
| Motor/Control | Variable-speed EC motor, SCB (USB programmable, Windows PC) |
| Orientation | Left-hand (BL2); right-hand variants available |
| Installation | Horizontal or vertical upflow (per Unico 3642 listings) |
| DOE SDHV compliance | Designed to meet/exceed 1.2 in. w.c. external static at rated airflow with matched cooling module |
| Approx. dimensions | ~16″ L × 42″ W × 20″ H; ~100 lb ship (reference) |
| Certifications | UL |
FAQs
Is this the right orientation? BL2 is left-hand. If your coil/plenum requires the opposite, select a BR* (right-hand) model.
Can I program it on site? Yes—use a Windows laptop via the SCB’s USB to set airflow/modes.
What about paired coils? Unico 3642 coils are available for heat pump/AC (R410A), chilled water, or hydronic. We’ll match to your design.
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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