2-Pipe Retrofit Vertical Fan Coil

Unilux retrofit vertical stack fan coil units meet the requirements of UL 1995 / CSA22.2 #236 – Issue 2011 for safety heating and cooling equipment.

Our 2-pipe retrofit vertical fan coil (VFC) is a great HVAC replacement solution for high-rise residences approaching 15 years old. The 2-pipe retrofit VFC system is designed to slide into the existing 2-pipe fan coil cabinet. This complete replacement system operates the same way the original 2-pipe unit does, but more efficiently.

Unilux retrofit fan coils provide heating in the winter, cooling in the summer and year-round ventilation.

Complete your unit with industry-leading accessories like our Wi-Fi enabled thermostats, grilles & access panels.


  • 2-Pipe standard blow-through (manual changeover)
  • 2-Pipe standard draw-through (manual changeover)
  • 2-Pipe blow-through with auxiliary heating element
  • 2-Pipe draw-through with auxiliary heating element

Our Quality Commitment

We take pride in designing and building the top-quality vertical fan coil units available. We have a number of measures in place to ensure our customers experience long-lasting high-quality home comfort, including:

  • Being ETL Intertek approved for electrical safety standards on all units
  • Using trusted European suppliers for all valves and actuators
  • Working with some of the most-trusted suppliers in the industry for all components
  • Using North-American made coils and blowers designed specifically for Unilux VFC
  • Pressure testing all coils and assemblies for leaks with state-of-the-art testing equipment
  • Inspecting each unit as they are completed
Save as PDF


Standard Equipment


Cabinets are 20-gauge stainless steel. The cabinet is fully-insulated with closed-cell insulation bonded with a thermosetting resin and coated on the airstream side with an acrylic facing – without the use of flammable adhesives. Insulation inside the unit is flame-spread rated no more than 25 and smoke developed rating no more than 50.

350-600 CFM dimensions – 22 ½” H x 13 ½” W x 14” D + 13” H blower
800-1200 CFM dimensions – 24” H x 18 ½” W x 17 ½” D + 13” H blower

Coil Assembly

Coils are ½-inch OD copper tubes with mechanically-bonded corrugated aluminum fins. The number of rows and circuiting are selected to suit scheduled capacities. Coils are rated for a minimum working pressure of 450 psig.

Fan Assembly

A thermally-protected, multi-speed ECM motor is resiliently mounted to a centrifugal fan which has a galvanized-steel forward-curved DWDI wheel in a painted housing.

Stainless Steel Drain Pan

The drain pan assembly is fully TIG welded to ensure the pan never rusts or leaks. The drain hose from the outlet to the condensate riser shall form a running P-Trap.

Piping Branches

Piping branches are constructed with ½-inch type “L” copper. Stainless steel braided flex hoses allow expansion and contraction of risers. Shut-off ball valves with flare nuts are included in the supply and return branches for easy removal.

Control Valve Package

Our standard is a factory-assembled 2-way control valve with flare nut connections to piping branches to facilitate easy removal. This includes motorized electrical “on/off” controlling. Control valves are piped normally-closed to the coil. Maximum entering water temperature on the control valve shall be 200°F and maximum operating pressure shall be 300 psig.

Drain Pan Overflow Sensor

Factory-installed drain pan overflow sensor detects rising drain pan water levels and turns off the unit to prevent flooding.


Programmable and multi-fan speed control thermostat options available.

Optional Equipment

Access Panel

Access panel assembly is constructed of 20-gauge steel complete with a durable baked enamel powder finish, with integral grille for the return air opening. The panel is hinged and removable for filter changes and maintenance access. The integral grille has fixed horizontal louvers.

Grilles and Registers

Double deflection supply grilles and registers have adjustable vertical and/or horizontal louvers. Registers are constructed with light-gauge metal complete with adjustable opposed blade dampers.

Unilux Controllers

Upgrade to new Unilux Thermostats including the new Unilux Pro AM Wi-Fi and Unilux Touch AM Wi-Fi Thermostat.


A 1-inch disposable filter is included with the return air grille.

Optional filters include 1-inch pleated MERV-8 filter, 1-inch pleated MERV-11 filter or 1-inch pleated MERV-13 filter.

Electric Heating Element

Available 1.5 KW auxiliary electric heater featuring single stage with an open-wire nickel-chrome element carried in floating ceramic bushings.

Water Prevention Sensors

We include a freeze protection temperature sensor that activates hot water connections when return air is below 4°C (40°F) to prevent freezing and flooding.

An audible alarm sounds if the unit enters protection mode.

New: Universe Thermostat Available on All Unilux Products