One-way Cassette

One-way Cassette D Series, 2-pipe | DK1D-E/A+200/300/400/500
Cooling capacity: W 7/12 °C ;A 27 °C DB /19.5°C WB ;1.08~4.50kW
Water flow rate: 0.31~0.77 m³/h
Heating capacity: W(inlet) 60°C; A 21°C DB; 1.62~6.75kW
Motor: DC/AC;
Hydraulic connections: Rc 3/4 ”
Indoor unit dimension(L×W×H) : 800 mm × 600 mm × 235 mm | Panel dimension: 980 mm × 660 mm × 42 mm
Air flow rate (H/M/L) : 170~850 m³/h (100~500 CFM)
Power Supply : 220/1/50(60) V/Ph/Hz
Heating capacity: W(inlet) 45°C; A 21°C DB; 1.08~4.50kW
Water pressure drop: 30 kPa
Power input: 22~74 W
Rated current: 0.10~0.34 A
Sound pressure level: 37~43 dB(A)
Net / Gross weight : 19.0~19.7 / 23.5~24.2 kg
Packing size(L×W×H) : 945 mm × 640 mm × 280 mm


One-way Cassette D Series, 2-pipe | DK1D-E/A+600/700/800
Cooling capacity: W 7/12 °C ;A 27 °C DB /19.5°C WB ;3.24~7.20kW
Water flow rate: 0.94~1.22 m³/h
Heating capacity: W(inlet) 60°C; A 21°C DB; 4.86~10.80kW
Motor: DC/AC;
Hydraulic connections: Rc 3/4 ”
Indoor unit dimension(L×W×H) : 1200 mm × 600 mm × 235 mm | Panel dimension: 1380 mm × 660 mm × 42 mm
Air flow rate (H/M/L) : 510~1,360 m³/h (300~800 CFM)
Power Supply : 220/1/50(60) V/Ph/Hz
Heating capacity: W(inlet) 45°C; A 21°C DB; 3.24~7.20kW
Water pressure drop: 40 kPa
Power input: 56~130 W
Rated current: 0.25~0.59 A
Sound pressure level: 45~46 dB(A)
Net / Gross weight : 24.6 / 29.1 kg
Packing size(L×W×H) : 1345 mm × 640 mm × 280 mm


One-way Cassette D Series, 2-pipe | DK1D-E/A+1000/1200/1400
Cooling capacity: W 7/12 °C ;A 27 °C DB /19.5°C WB ;5.40~12.60kW
Water flow rate: 1.56~2.16 m³/h
Heating capacity: W(inlet) 60°C; A 21°C DB; 8.10~18.90kW
Motor: DC/AC;
Hydraulic connections: Rc 3/4 ”
Indoor unit dimension(L×W×H) : 1600 mm × 600 mm × 235 mm | Panel dimension: 1780 mm × 660 mm × 42 mm
Air flow rate (H/M/L) : 850~2,380 m³/h (500~1,400 CFM)
Power Supply : 220/1/50(60) V/Ph/Hz
Heating capacity: W(inlet) 45°C; A 21°C DB; 5.40~12.60kW
Water pressure drop: 40~50 kPa
Power input: 88~221 W
Rated current: 0.40~1.00 A
Sound pressure level: 48~52 dB(A)
Net / Gross weight : 34.3 / 39.3 kg
Packing size(L×W×H) : 1745 mm × 640 mm × 280 mm

Product downloads

  • PDF DERK FCU leaflet(V26) Datasheet · Cassette, duct, ceiling & floor, console and convector units. · 2.2 MB

Frequently Asked Questions

What cassette models does DERK offer?

We manufacture one-way, two-way, four-way, round and eight-way cassette units for chilled-water systems, covering typical cooling capacities from 2.2 kW to 14 kW with fixed-speed and DC inverter options.

How thin is the ceiling panel?

Panel profiles are designed to fit shallow ceiling voids, with front panels starting from roughly 30 mm on one-way models to about 50 mm on four-way models.

Are cassettes compatible with DERK chillers?

Yes. Cassettes are built for hydronic systems and connect directly to DERK air-cooled chillers, mini chillers and heat pump water heaters for a complete chilled-water solution.

What controls are available?

Units include wired controllers with optional WiFi/App control, BMS integration via Modbus, and centralized control through the DERK control system.

Can the front panel be customized?

Yes. Front panels can be supplied in custom colors and finished with your brand logo, which is popular for hotel chains and multi-unit projects.

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