Ultra-slim Duct

Ultra-slim Duct B Series, 2-pipe | DT3B-E/AG12L+200/300
Cooling capacity: W 7/12 °C ;A 27 °C DB /19.5°C WB ;1.08~2.70kW
Water flow rate: 0.31~0.47 m³/h
Heating capacity: W(inlet) 60°C; A 21°C DB; 1.62~4.05kW
Motor: DC/AC;
Hydraulic connections: Rc 3/4 ”
Indoor unit dimension(L×W×H) : 889 mm × 451 mm × 200 mm
Air flow rate (H/M/L) : 170~510 m³/h (100~300 CFM)
Power Supply : 220/1/50(60) V/Ph/Hz
Heating capacity: W(inlet) 45°C; A 21°C DB; 1.08~2.70kW
Water pressure drop: 30 kPa
Power input: 22~50 W
Rated current: 0.10~0.23 A
Sound pressure level: 37~39 dB(A)
Net / Gross weight : 16.0 / 17.5 kg
Packing size(L×W×H) : 955 mm × 500 mm × 215 mm


Ultra-slim Duct B Series, 2-pipe | DT3B-E/AG12L+400
Cooling capacity: W 7/12 °C ;A 27 °C DB /19.5°C WB ;2.16~3.60kW
Water flow rate: 0.61 m³/h
Heating capacity: W(inlet) 60°C; A 21°C DB; 3.24~5.40kW
Motor: DC/AC;
Hydraulic connections: Rc 3/4 ”
Indoor unit dimension(L×W×H) : 1089 mm × 451 mm × 200 mm
Air flow rate (H/M/L) : 340~680 m³/h (200~400 CFM)
Power Supply : 220/1/50(60) V/Ph/Hz
Heating capacity: W(inlet) 45°C; A 21°C DB; 2.16~3.60kW
Water pressure drop: 30 kPa
Power input: 36~60 W
Rated current: 0.16~0.27 A
Sound pressure level: 41 dB(A)
Net / Gross weight : 19.0 / 21.0 kg
Packing size(L×W×H) : 1155 mm × 500 mm × 215 mm


Ultra-slim Duct B Series, 2-pipe | DT3B-E/AG12L+500/600
Cooling capacity: W 7/12 °C ;A 27 °C DB /19.5°C WB ;2.70~5.40kW
Water flow rate: 0.77~0.94 m³/h
Heating capacity: W(inlet) 60°C; A 21°C DB; 4.05~8.10kW
Motor: DC/AC;
Hydraulic connections: Rc 3/4 ”
Indoor unit dimension(L×W×H) : 1289 mm × 451 mm × 200 mm
Air flow rate (H/M/L) : 425~1,020 m³/h (250~600 CFM)
Power Supply : 220/1/50(60) V/Ph/Hz
Heating capacity: W(inlet) 45°C; A 21°C DB; 2.70~5.40kW
Water pressure drop: 30~40 kPa
Power input: 44~93 W
Rated current: 0.20~0.42 A
Sound pressure level: 43~45 dB(A)
Net / Gross weight : 22.0 / 25.0 kg
Packing size(L×W×H) : 1355 mm × 500 mm × 215 mm


Ultra-slim Duct B Series, 2-pipe | DT3B-E/AG12L+700/800
Cooling capacity: W 7/12 °C ;A 27 °C DB /19.5°C WB ;3.78~7.20kW
Water flow rate: 1.05~1.22 m³/h
Heating capacity: W(inlet) 60°C; A 21°C DB; 5.67~10.80kW
Motor: DC/AC;
Hydraulic connections: Rc 3/4 ”
Indoor unit dimension(L×W×H) : 1539 mm × 451 mm × 200 mm
Air flow rate (H/M/L) : 595~1,360 m³/h (350~800 CFM)
Power Supply : 220/1/50(60) V/Ph/Hz
Heating capacity: W(inlet) 45°C; A 21°C DB; 3.78~7.20kW
Water pressure drop: 40 kPa
Power input: 67~130 W
Rated current: 0.30~0.59 A
Sound pressure level: 46 dB(A)
Net / Gross weight : 28.0 / 31.5 kg
Packing size(L×W×H) : 1605 mm × 500 mm × 215 mm

Product downloads

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

Frequently Asked Questions

What is a ducted fan coil unit?

A ducted FCU is concealed above the ceiling and distributes conditioned air through ductwork, providing invisible, uniform comfort for offices, hotels, shops and homes.

What static pressures are available?

Standard concealed units offer around 30-80 Pa, while high-static-pressure models reach approximately 120-200 Pa for long or complex duct runs in commercial buildings.

How thin can concealed units be?

Ultra-thin models are as low as about 200-230 mm in height, allowing installation in shallow ceiling plenums without lowering the ceiling.

Can units provide heating as well as cooling?

Yes. Options include 2-pipe and 4-pipe hydronic coils, electric heater kits and hot-water coils to match the heating source available at the project.

Do you supply duct accessories and controls?

We supply flexible ducts, grilles, filters, wired or wireless controllers, and BMS interfaces as part of complete project packages.

Ready to Get a Quote?

Fast reply within working hours

Chat with us on WhatsApp

WhatsApp: +86 136 9058 2251

Send us a message