EKCW 900DA Fan Coil Unit: Specs, Features and Applications

A wall-mounted split AC is often not enough to cool a busy office floor, hotel corridor or retail store through a Lahore summer. These spaces need steady, quiet airflow that reaches every corner and stays hidden from view. The EKCW 900DA Fan Coil Unit is built for this job. It sits above the ceiling, connects to ductwork and supplies cool or warm air through neat diffusers.

This guide covers what the unit is and how it works. It also includes the full technical data, where the unit performs best and what to check before installation. Consultants, contractors, facility managers and property owners can use it to decide whether this model suits their project.

Key takeaways:

• The EKCW-DA 900 delivers 7.17 kW of cooling and 14.41 kW of heating from a single concealed unit.
• Its 75 Pa external static pressure pushes air through ducts to several rooms or diffusers.
• Three fan speeds, from 761 to 920 CFM, let you balance comfort, noise and energy use.
• It works with central chilled water and hot water systems in commercial and residential buildings.

Quick Answer

The EKCW-DA 900 (model 900DA) is a horizontal water recessed ductable unit designed for concealed ceiling installation. It uses chilled water for cooling and hot water for heating. It provides 7.17 kW nominal cooling, 14.41 kW nominal heating and up to 920 CFM of airflow at 75 Pa external static pressure. A centrifugal forward-curved fan, a three-speed direct-drive motor and a copper tube coil with hydrophilic aluminum fins give it quiet, efficient performance. Sound pressure is 48.2 dB(A). Typical applications include offices, hotels, shopping malls, hospitals, banks, shops, homes and other commercial buildings.

What Is a Ducted Fan Coil Unit?

This type of unit is a concealed terminal that uses water from a central plant to cool or heat air and then sends that air through ductwork. It has no compressor of its own. Instead, fan coil systems depend on a central chiller for cooling and a boiler or heat pump for heating.

Each unit contains three main parts:

• A water coil, where heat moves between the air and the water
• A fan, which pulls room air across the coil
• A drain pan, which collects condensation during cooling

The EKCW-DA 900 follows this design in a compact horizontal body. It provides efficient cooling and heating with a centrifugal fan, three-speed operation and 75 Pa external static pressure. Its slim profile fits inside false ceilings, which makes it well suited to ducted air distribution in residential and commercial spaces.

The next section explains how the system cools a room.

How a Chilled Water Fan Coil Unit Works

The unit cools a space by passing room air over a coil filled with cold water. The process runs in a steady loop:

1. The chiller cools the water. A central chiller supplies chilled water, usually at around 7°C, through insulated pipes.
2. Water enters the coil. On the EKCW-DA 900, water flows through the copper tube coil at about 0.68 m³/h.
3. The fan moves the air. The centrifugal fan draws warm return air across the aluminum fins.
4. Heat moves into the water. The air cools down and the water warms up.
5. Cool air reaches the room. Ductwork carries the conditioned air to diffusers in one or more rooms.
6. Condensate drains away. Moisture removed from the air collects in the drain pan and leaves through the Rc3/4 connection.
7. Water returns to the plant. The warmer water flows back to the chiller to be cooled again.

Heating follows the same steps, with hot water in the coil instead of chilled water. The 13 kPa water pressure drop is moderate, so the unit places a reasonable load on your pumping system.

Key Benefits and Features

The model combines strong capacity, flexible ducting and quiet operation in one concealed package. Each feature is explained below.

Why Use the EKCW 900DA Fan Coil Unit?

• 7.17 kW nominal cooling capacity: This equals roughly 2 tons of refrigeration (TR). It suits medium-sized offices, shops, hotel rooms and apartments.
• 14.41 kW nominal heating capacity: The unit provides strong heating from hot water, which helps during Lahore and Rawalpindi winters.
• Airflow up to 920 CFM: High air volume spreads conditioned air evenly across larger floor areas.
• 75 Pa external static pressure: The fan has enough pressure to move air through duct runs, grilles and diffusers.
• Three-speed fan operation: You can choose high, medium or low speed to match occupancy and comfort needs.
• Copper tube coil with hydrophilic aluminum fins: This coil design supports efficient heat transfer and drains condensate well.
• Concealed ceiling and ducted installation: Only grilles and diffusers are visible, which keeps interiors clean.
• Designed for low-noise operation: A sound pressure of 48.2 dB(A) suits workspaces, hotels and healthcare settings.
• Convenient installation and maintenance: The compact horizontal layout simplifies mounting, piping and service access.

Coil and Fan Design

The coil uses copper tubes paired with hydrophilic aluminum fins. A hydrophilic coating lets condensed water spread thinly and run off the fins instead of forming droplets. This keeps air passages open, supports steady heat transfer and reduces the chance of water being carried into the ducts.

The fan is a centrifugal forward-curved design. This fan type moves large volumes of air at low to medium pressure while staying quiet. It is driven by a direct-drive, three-speed motor. With no belts to adjust or replace, there are fewer wearing parts, less maintenance and more reliable operation.

Technical Specifications of the EKCW 900DA Fan Coil Unit

The table below lists the full technical data for the EKCW-DA 900.

Specification	EKCW-DA 900
Model	900DA
Unit Type	Horizontal Water Recessed Ductable
Cooling Capacity	7.17 kW
Heating Capacity	14.41 kW
Airflow – High	920 CFM
Airflow – Medium	891 CFM
Airflow – Low	761 CFM
External Static Pressure	75 Pa
ESP Application Range	40–100 Pa
Sound Pressure	48.2 dB(A)
Water Flow	0.68 m³/h
Water Pressure Drop	13 kPa
Rated Power – High	299 W
Rated Current – High	1.53 A
Power Supply	220–240V / 1Ph / 50Hz
Condensate Drain	Rc3/4
Installation	Concealed Ceiling / Ducted
Coil	Copper Tube with Hydrophilic Aluminum Fin
Fan Type	Centrifugal Forward-Curved
Fan Motor	Direct Drive, 3-Speed

Fan Speed Performance at a Glance

Fan Speed	Airflow	Best Used For
High	920 CFM	Peak summer loads, full occupancy, fast pull-down cooling
Medium	891 CFM	Everyday comfort in offices, shops and hotel rooms
Low	761 CFM	Quiet hours, night-time use and lightly occupied spaces

At high speed, the unit draws just 299 W and 1.53 A on a standard single-phase supply. That makes electrical connection simple in both homes and commercial buildings.

Where Is the Chilled Water FCU Used?

This unit works best in buildings that already have, or plan to install, a central chiller plant and want hidden, ducted comfort cooling.

• Offices and IT companies: Quiet, even cooling across open-plan floors and meeting rooms.
• Hotels: Discreet climate control in guest rooms, corridors and lobbies, with individual speed control.
• Shopping malls: Reliable cooling for retail outlets inside large commercial complexes.
• Hospitals: Low noise and steady temperatures for wards, consultation rooms and waiting areas.
• Banks: A clean ceiling look and consistent comfort for customers and staff.
• Shops and showrooms: Hidden equipment that keeps attention on products and displays.
• Homes and luxury villas: Whole-house ducted comfort without wall-mounted indoor units.
• Commercial buildings: Any concealed ceiling ducted application on a central water system.

In larger buildings, a chilled water fan coil unit lets each zone control its own fan speed while sharing one efficient central plant. This flexibility explains why the system is so common in malls, hospitals and multi-storey offices across Pakistan.

Installation Type: Concealed Ceiling and Ducted

The EKCW-DA 900 mounts horizontally above a false ceiling and connects to supply and return ductwork. As a ducted fan coil unit, it can serve one large room or several smaller rooms from a single concealed position.

The 75 Pa rated external static pressure, with an application range of 40–100 Pa, lets the fan overcome resistance from ducts, bends, filters and diffusers. This range gives designers flexibility on duct length and layout.

Installation Checklist

Before installing the unit, check the following points:

1. Ceiling void depth: Confirm there is enough space for the unit, ducts and pipework.
2. Service access: Fit an access panel below the unit for filter, coil and valve maintenance.
3. Drain slope: Slope the Rc3/4 condensate line correctly to prevent water backing up.
4. Pipe insulation: Insulate chilled water pipes to stop condensation and drips.
5. Duct design: Size ducts to keep external static pressure within 40–100 Pa.
6. Electrical supply: Provide 220–240V, single-phase, 50Hz power with suitable protection.
7. Testing and balancing: Commission water flow and airflow so every outlet performs as designed.

Common Mistakes to Avoid

• Leaving no access panel, which makes routine servicing difficult
• Undersizing ducts, which pushes static pressure too high and reduces airflow
• Skipping pipe insulation, which can lead to ceiling stains and mold
• Choosing a unit by tonnage alone without a proper heat load calculation

EKCW-DA 900 vs Conventional Split AC

Factor	EKCW-DA 900 (Central Water System)	Conventional Split AC
Cooling source	Central chiller plant	Individual outdoor compressor
Visibility	Hidden in ceiling, only diffusers visible	Indoor unit mounted on wall
Air distribution	Ducted to one or more rooms	Single room only
Heating	Hot water coil, 14.41 kW	Depends on inverter heat pump model
Outdoor units	None per room	One per system
Best for	Multi-zone commercial and large residential projects	Small rooms and standalone spaces

Why Choose Workman Services for FCU Supply and Installation?

Workman Services has delivered HVAC&R and fire fighting solutions since 2006. Our designers, sales engineers and certified technicians manage every stage of your project, including system design, supply, installation, testing, commissioning and maintenance.

We size every fan coil installation against a proper heat load calculation, so you get the right capacity for your space. Our project portfolio includes HVAC and firefighting work at Nishat Galleria Mall, FCU unit supply for Haseens at Giga Mall, and commercial projects at Dolmen Mall and MM Alam Road.

What you can expect:

• Quality brands: Top-rated equipment for performance, efficiency and durability
• Trusted technicians: Certified, skilled teams for installation and service
• Always on time: Work scheduled and completed as agreed
• Long-term savings: Reliable systems that help you avoid costly repairs
• Wide coverage: Branches in Lahore, Rawalpindi and Faisalabad, plus Abu Dhabi, UAE

Frequently Asked Questions

What is the EKCW-DA 900?

The EKCW-DA 900 (model 900DA) is a horizontal water recessed ductable terminal unit for concealed ceiling installation. It cools and heats air using water from a central plant and distributes it through ductwork.

What is the cooling capacity of the EKCW-DA 900?

It delivers 7.17 kW of nominal cooling, which is about 2 TR. It also provides 14.41 kW of nominal heating and up to 920 CFM of airflow at high speed.

What is the difference between a chilled water fan coil unit and a split AC?

A split AC uses its own compressor and refrigerant to cool one room. A water-based terminal unit has no compressor. It uses chilled water from a central chiller, can serve several rooms through ducts, and leaves no outdoor unit at each room.

Is the EKCW-DA 900 a ducted fan coil unit?

Yes. It connects to supply and return ductwork, delivers 75 Pa external static pressure and works within a 40–100 Pa range. That makes it suitable for multi-outlet ducted layouts.

How quiet is the EKCW 900DA Fan Coil Unit?

Its rated sound pressure is 48.2 dB(A). The centrifugal forward-curved fan and three-speed motor keep it quiet enough for offices, hotel rooms, banks and hospitals.

Can a chilled water FCU also provide heating?

Yes. When the system supplies hot water instead of chilled water, the EKCW-DA 900 delivers 14.41 kW of nominal heating through the same coil.

What does 75 Pa external static pressure mean?

External static pressure (ESP) is the air resistance the fan can overcome outside the unit, including ducts, filters, grilles and diffusers. At 75 Pa, the unit can push air through moderate duct runs to several outlets.

How do you maintain EKCW 900DA Fan Coil Unit?

Clean or replace the air filter regularly, inspect and clean the coil and drain pan, and keep the condensate line clear. Have a qualified HVAC team check valves, fan operation and pipe insulation once or twice a year.

What power supply does the EKCW-DA 900 need?

It runs on 220–240V, single-phase, 50Hz power. At high speed, it draws 299 W and 1.53 A.

Where can I buy the EKCW 900DA Fan Coil Unit in Lahore?

You can get supply, installation and commissioning from Workman Services. Our office is at M1, M2 Bara Tower, 36 Queens Road, Abid Market, Lahore, with branches in Rawalpindi and Faisalabad.

Get the Right Cooling for Your Project

The EKCW 900DA Fan Coil Unit offers a practical combination of strong cooling and heating capacity, flexible ducting and quiet operation. All of it stays hidden above your ceiling. For offices, hotels, malls, hospitals and homes on a central water system, it provides reliable comfort that is easy to control and service.

Choosing the right unit is only part of the job. Correct sizing, duct design and commissioning determine how well it performs. Contact Workman Services on 0306-4410583 or email info@workmanservices.com.pk to discuss your project and get an expert recommendation.