Split / Hi Wall Fan Coil Units (FCU) – Dedicated Zone Cooling Units

Hi wall FCUs are commonly available from about 0.75 TR to 2.5 TR, with airflow of roughly 250 to 800 CFM. Exact ranges vary by brand and model. For larger spaces, cassette or ducted FCUs are usually better suited.

FCU sizing depends on room area, occupancy, glass exposure, lighting, and equipment load. A small hotel room or cabin may need a unit similar in capacity to a small wall mounted AC, while a larger bedroom or office may need the equivalent of a 2 ton wall mounted air conditioner. Compress India performs heat load calculations for accurate fan coil unit selection.

Actual FCU capacity depends on the chilled water supply and return temperatures. Coil rows and circuiting are selected to deliver the rated output at your building's chilled water conditions.

Fan coil airflow and noise vary with fan speed. For hotel rooms and bedrooms, a quiet hi wall FCU is selected to meet the cooling load comfortably on medium or low speed, keeping noise levels low.

A two way valve FCU setup opens and closes chilled water flow based on the thermostat. It supports variable flow systems and reduces pumping energy.

Three-way valves divert water around the coil when cooling is not needed. They keep flow constant in the system but offer lower energy savings than two-way valves.

A PICV for FCU combines balancing and control in one valve. It delivers the correct flow regardless of system pressure changes, ensuring stable room temperatures and simpler commissioning.

An FCU balancing valve sets the design flow for each unit, while strainers protect the coil and valve from dirt and debris.

Wall thermostats let occupants set temperature and fan speed, and they provide accurate room temperature sensing.

A hi wall FCU remote control offers the same convenience as a split AC remote, which is ideal for hotel rooms and residences.

Occupants can choose fan speed manually or select auto mode, where the controller adjusts speed based on the room load.

A hi wall FCU with BMS integration allows central monitoring, scheduling, and setpoint limits. Fan coil building automation helps facility teams save energy and respond to issues quickly.

In hotel rooms, the FCU can be linked to keycard switches or occupancy sensors, automatically setting back the temperature when the guest leaves.

EC motors use significantly less power than standard AC motors, especially at low and medium speeds, where FCUs run most of the time.

Two-way valves and PICVs allow the chilled water system to run on variable flow, reducing pump energy and improving chiller efficiency.

Setpoint limits, time schedules, and occupancy-based control prevent overcooling and waste in empty rooms. Together, these features make an energy efficient fan coil unit system.

A room fan coil unit gives each occupant control over their own comfort without affecting other rooms.

Unlike a wall mounted split system, a hi wall FCU needs no condenser, so there is no need for mounting units on the exterior wall and the building facade stays clean.

FCUs use chilled water, avoiding refrigerant piping inside occupied spaces and reducing refrigerant-related risks.

With no compressor in or near the room, a low noise hi wall fan coil unit provides peaceful comfort for bedrooms, wards, and hotel rooms.

Hi wall FCUs mount directly on the wall, making them ideal for rooms without a false ceiling or with limited ceiling height.

A central chiller is more efficient than dozens of individual split ACs, lowering overall energy use across the building.

Hi wall FCUs need a chiller plant or district cooling supply. They cannot operate on their own.

FCUs recirculate room air. Fresh air must be provided separately through a treated fresh air unit or ventilation system.

Every FCU needs a properly sloped drain line or a condensate pump.

Hi wall FCUs suit individual rooms. Large halls and open areas are better served by cassette FCUs, ducted FCUs, or AHUs.

Compress India plans fresh air, drainage, and unit selection from the start, so these limitations never become site problems.

A hi wall fan coil unit for hotel rooms delivers quiet, individually controlled comfort with keycard integration, making it a standard hotel room FCU solution.

Hospitals use hi wall FCUs in private rooms and wards for individual control and quiet operation, with fresh air supplied separately through AHUs.

A fan coil unit for apartments suits premium residential towers and district cooling FCU projects, giving each flat room-wise control without outdoor units on the facade.

A fan coil unit for offices provides individual cabin cooling, letting each user set their own comfort level.

Hi wall FCUs provide simple, reliable, and quiet cooling for multiple rooms connected to one central plant.

In older buildings without false ceilings, a wall mounted FCU for individual room cooling is the easiest way to add central chilled water comfort.

Filters should typically be cleaned every two to four weeks, depending on dust levels and usage. Clean filters maintain airflow and air quality.

Periodic coil and fan cleaning removes dust and biological growth, restoring cooling performance and reducing odours.

The drain pan and drain line are cleaned and flushed to prevent choking, overflow, and water leakage.

Control valves and actuators are checked for correct operation, leaks, and response to thermostat signals.

• Comprehensive AMC: Covers scheduled maintenance plus specified spare parts, with predictable annual costs.
• Non-Comprehensive AMC: Covers scheduled maintenance and service visits, with spare parts charged separately.

Causes: closed or stuck valve, air in the coil, dirty filter or coil, or low chilled water supply.

Solution: Check valve operation, vent air, clean the filter and coil, and verify chilled water flow and temperature.

Causes: blocked drain, wrong slope, or cracked drain pan.

Solution: Clean the drain, correct the slope, and repair or replace the pan.

Causes: damaged or missing insulation, or gaps in the vapour barrier.

Solution: Re-insulate pipes and valves and seal all joints properly.

Causes: dirty fan blades, worn bearings, loose parts, or high fan speed.

Solution: Clean the fan, replace bearings, tighten parts, and adjust speed settings.

Causes: stagnant water in the drain pan, dirty coil, or microbial growth.

Solution: Clean and sanitize the coil, pan, and drain line, and maintain a regular cleaning schedule.

Causes: dirt in the valve, actuator motor failure, or wiring faults.

Solution: Clean or replace the valve and repair or replace the actuator.

Causes: dead batteries, wiring faults, or controller failure.

Solution: Check power and wiring, and repair or replace the thermostat.

Old, noisy, or inefficient units can be replaced with modern hi wall FCUs that deliver better cooling, lower noise, and lower energy use.

Switching to EC motor FCUs cuts fan energy significantly and provides smoother, quieter speed control.

Upgrading to PICVs and smart or BMS-connected thermostats improves temperature stability and energy savings.

Buildings with many individual wall mounted split ACs can switch to a central chiller with chilled water FCUs. This removes outdoor units from the facade, reduces refrigerant use, and lowers long-term energy costs.

Higher capacity units cost more due to larger coils and fans. EC motor models are priced higher than standard AC motor units but save energy over their life.

Valve kits, PICVs, thermostats, chilled water piping, insulation, drain lines, and electrical work make up a significant part of the total installed cost.

Brand, 2-pipe or 4-pipe configuration, motor type, valve type, controls and BMS integration, pipe routing, and site conditions all affect the final price.

Share your room list and building details with Compress India to receive an accurate hi wall FCU quotation.