Floor-standing fan coil unit OptiLine™

Model
FSG

Product overview
OptiLine™ Vertical Stacked Fan Coils (FSG) provide a compact stacked fan coil solution for multi-floor apartments, office buildings, hotels and similar applications. Ranging from 300 to 1,200 CFM, these units minimize occupied floor footprint and can replace multiple conventional fan coil units while delivering quiet, efficient operation and annual energy savings typically between 30% and 50%.

Fits Your Space Requirements
Available in six sizes (003–012), OptiLine™ is designed for retrofit and new construction projects where floor space is limited. The compact footprint and multiple discharge arrangements simplify installation in stacked or modular layouts.

Complete Comfort
Equipped with a variable-speed motorized impeller and an EC motor optimized to the impeller, the fan operates at low RPM (typically < 60% capacity) to achieve a noise criterion (NC) below 30. This low-speed operation also improves humidity control for better indoor air quality and occupant comfort.

Reduces Energy Costs
Factory-standard energy-saving features and efficient components reduce operating energy by approximately 30–50% compared with typical fan coil systems, lowering lifecycle costs in high-density residential and commercial applications.

Features

• Backward-inclined, ECM-driven, direct-drive plenum fan
• Smallest footprint in each cabinet size
• Standard 1/2" fiberglass insulation; optional 3/8" closed-cell insulation
• Multiple coil options for varied water temperatures and flow rates
• Single-point power standard on all electric heat selections
• Tool-less access door for easy component access
• Standard MERV10 filter for effective particle arrestance
• Factory-installed valve packages with various control and valve types available
• Optional factory-wired thermostat; BACnet-capable controls available
• Multiple discharge arrangements
• Optional factory-installed/wired condensate overflow pump for non-gravity drains
• Optional factory swaged risers (2-pipe and 4-pipe), factory-mounted or shipped loose
• Drain pan options: acrylic-coated galvanized steel, stainless steel, ABS plastic; optional condensate overflow protection switch

Performance

• Thermal insulation value: R‑6.5
• Sizes: 003 to 012 (six sizes)
• Heating capacity: 9 to 38.2 Mbh
• Airflow range: 300–1,200 CFM
• Noise criterion (NC): < 30.0

Technical characteristics / specifications

• Model designation: FSG
• Fan: Backward-inclined, ECM-driven, direct-drive plenum fan
• Motor: Variable-speed motorized impeller with EC motor optimized to impeller
• Airflow range: 300–1,200 CFM
• Available sizes: six sizes (003–012)
• Heating range: 9–38.2 Mbh
• Thermal insulation: Standard 1/2" fiberglass; optional 3/8" closed-cell
• Filter: Standard MERV10
• Controls: Optional factory-wired thermostat; BACnet-capable controls available
• Condensate management: Optional factory-installed/wired condensate overflow pump; multiple drain pan materials/options
• Installation options: Optional factory swaged risers (2-pipe and 4-pipe), factory-mounted or shipped loose
• Typical energy savings: 30–50% vs. typical fan coil systems
• Noise performance: NC < 30