Description
The Grandaire FMA5L1800AL is a high-performance indoor air handler in the FMA5L Series, designed to deliver efficient climate control with a nominal capacity of 18,000 BTU (1.5 tons). It uses low-GWP, non-ozone-depleting R‑454B refrigerant and supports both vertical and horizontal mounting for installation in tight spaces. Designed for integration with compatible condensing units, this air handler delivers balanced and reliable airflow. It’s ideal for apartments, condos, and light commercial buildings seeking compact, dependable performance.
Performance
Equipped with a multi-speed PSC blower motor, the FMA5L1800AL maintains consistent airflow suited to its tonnage. Its all-aluminum coil optimizes heat transfer while minimizing pressure drop, ensuring steady-state efficiency. The TXV metering device delivers precise refrigerant flow, improving responsiveness and temperature control. Though not variable speed, the unit’s performance is reliable and consistent across a wide range of use cases.
Smart Features
This air handler is compatible with a variety of smart thermostats and third-party zoning control systems. Its flexible control configuration allows integration into smart HVAC setups for enhanced comfort and energy management. Support for zoning and multi-stage thermostat applications makes it ideal for multi-family dwellings or light commercial spaces where room-by-room temperature control is desired.
Comfort & Noise
Designed with a fully insulated cabinet and vibration-reducing components, the FMA5L1800AL delivers quiet operation in residential and commercial settings. It maintains balanced airflow that promotes even temperature distribution while avoiding unwanted drafts. A sloped drain pan and corrosion-resistant internal components help maintain indoor air quality and long-term reliability.
Use Case Fit
The FMA5L1800AL is well-suited for residential homes, apartments, multi-family housing, and light commercial installations. It performs efficiently in regions with moderate heating and cooling requirements. The unit’s compact footprint, flexible orientation, and R‑454B refrigerant compliance make it suitable for both new builds and retrofit projects seeking lower environmental impact.
Value & Reliability
Constructed with a durable galvanized steel cabinet and corrosion-resistant coil, the unit is built for long-term operation. Internal insulation enhances thermal and acoustic performance. Factory-installed safety features, such as refrigerant leak mitigation components, support compliance with modern standards. Together, these factors make the unit a dependable, low-maintenance solution for property managers and HVAC contractors.
Summary Wrap-Up
The Grandaire FMA5L1800AL offers a strong blend of comfort, efficiency, and environmentally conscious design. With R‑454B refrigerant, quiet performance, and compatibility with modern HVAC controls, it meets the needs of today’s homeowners, developers, and contractors. Whether you're upgrading a multi-family building or outfitting a light commercial space, this air handler delivers lasting value and reliable airflow performance.
Key Features
- R‑454B Refrigerant: Employs low-GWP, non-ozone-depleting R‑454B refrigerant, supporting modern environmental standards.
- 1.5 Ton (18,000 BTU) Capacity: Delivers dependable heating and cooling for residential and light commercial applications.
- Multi-Speed PSC Blower Motor: Provides consistent airflow tailored to system demands for efficient temperature regulation.
- All-Aluminum Coil: Resists corrosion and enhances thermal efficiency for longer system life and lower maintenance.
- TXV Metering Device: Enables precise refrigerant control to maintain stable operation and system performance.
- Flexible Mounting Configurations: Supports both vertical and horizontal installations to accommodate space limitations.
- Quiet, Insulated Cabinet Design: Reduces operating noise for improved indoor comfort across all occupied spaces.
