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The ROTER-LT-S series is a proprietary design of Roter. It employs a unique method to combine the direct expansion (DX) system and the purification system into an integrated fresh-air single-flow dehumidification and purification system. This model is particularly suitable for delivering dried fresh air to locations that require it, or for recirculation within designated spaces. It can also serve as a single-flow fresh-air system installed outside rooms in special environments (e.g., paint booths and areas with hazardous gases). Once the humid air is purified and dehumidified, it is supplied into the room and can likewise function as equipment for fresh-air and positive-pressure systems. Maintaining a long-term positive-pressure fresh-air environment resolves bacterial growth and dampness issues while ensuring an adequate oxygen supply.
| Equipment Category | Fresh-Air Single-Flow Haze-Removal Dehumidification Purification System |
| Model | LT-S28L |
| Test Condition | 30°C, 80% |
| Dehumidification Capacity | 28 L/day |
| Supply Airflow | 280–350 m³/h |
| Fan Type | 2-Speed Adjustable / Stepless Speed Control |
| Supply Static Pressure | 100 Pa |
| Return Airflow | 280–350 m³/h |
| Fresh Airflow | 0 |
| Operating Power | 400 W |
| Operating Current | 1.8 A |
| Voltage / Frequency | 220 V / 50 Hz |
| Control Method | Full-Touch LCD |
| Electric Shock & Water Ingress Protection | Class I / IPX3 |
| Noise | <35 dB |
| Compressor | Baifuma* |
| Refrigerant | R134a |
| Heat Exchanger | Hydrophilic Aluminum Foil & Copper Tubing |
| Drain Pan | SUS304 Stainless Steel |
| Drain Pipe Diameter | DN20 |
| Filtration (Optional) | Primary / Medium / High-Efficiency |
| Purification (Optional) | UV Sterilization / Negative Ions |
| Fresh-Air Inlet | None |
| Return-Air Inlet | Φ100 mm |
| Supply-Air Outlet | Φ100 mm |
| Exhaust Outlet | None |
| Dimensions | 760 × 455 × 265 mm |
| Net Weight | 34 kg |
| Equipment Category | Fresh-Air Single-Flow Haze-Removal Dehumidification Purification System | |
| Model | LT-S40L | LT-S60L |
| Test Condition | 30°C, 80% | |
| Dehumidification Capacity | 40 L/day | 60 L/day |
| Supply Airflow | 500–670 m³/h | 650–780 m³/h |
| Fan Type | 2-Speed Adjustable / Stepless Speed Control | |
| Supply Static Pressure | 100 Pa | |
| Return Airflow | 500–670 m³/h | 650–780 m³/h |
| Fresh Airflow | 0 | |
| Operating Power | 620 W | 700 W |
| Operating Current | 2.8 A | 3.3 A |
| Voltage / Frequency | 220 V / 50 Hz | |
| Control Method | Full-Touch LCD | |
| Electric Shock & Water Ingress Protection | Class I / IPX3 | |
| Noise | <45 dB | |
| Compressor | Baifuma* | |
| Refrigerant | R134a | |
| Heat Exchanger | Hydrophilic Aluminum Foil & Copper Tubing | |
| Drain Pan | SUS304 Stainless Steel | |
| Drain Pipe Diameter | DN20 | |
| Filtration (Optional) | Primary / Medium / High-Efficiency | |
| Purification (Optional) | UV Sterilization / Negative Ions | |
| Fresh-Air Inlet | None | |
| Return-Air Inlet | Φ150 mm | |
| Supply-Air Outlet | Φ150 mm | |
| Exhaust Outlet | None | |
| Dimensions | 950 × 539 × 265 mm | |
| Net Weight | 45 kg | 47 kg |
| Equipment Category | Fresh-Air Single-Flow Haze-Removal Dehumidification Purification System | |
| Model | LT-S100L | LT-S140L |
| Test Condition | 30°C, 80% | |
| Dehumidification Capacity | 100 L/day | 140 L/day |
| Supply Airflow | 1,000–1,200 m³/h | 1,200–1,350 m³/h |
| Fan Type | 2-Speed Adjustable / Stepless Speed Control | |
| Supply Static Pressure | 100 Pa | |
| Return Airflow | 1,000–1,200 m³/h | 1,200–1,350 m³/h |
| Fresh Airflow | 0 | |
| Operating Power | 920 W | 1,160 W |
| Operating Current | 4.3 A | 5.4 A |
| Voltage / Frequency | 220 V / 50 Hz | |
| Control Method | Full-Touch LCD | |
| Electric Shock & Water Ingress Protection | Class I / IPX3 | |
| Noise | <45 dB | |
| Compressor | Panasonic | |
| Refrigerant | R410A | |
| Heat Exchanger | Hydrophilic Aluminum Foil & Copper Tubing | |
| Drain Pan | SUS304 Stainless Steel | |
| Drain Pipe Diameter | DN20 | |
| Filtration (Optional) | Primary / Medium / High-Efficiency | |
| Purification (Optional) | UV Sterilization / Negative Ions | |
| Fresh-Air Inlet | None | |
| Return-Air Inlet | Φ200 mm | |
| Supply-Air Outlet | Φ200 mm | |
| Exhaust Outlet | None | |
| Dimensions | 1,030 × 639 × 375 mm | |
| Net Weight | 68 kg | 71 kg |
| Equipment Category | Fresh-Air Single-Flow Haze-Removal Dehumidification Purification System | |
| Model | LT-S180L | LT-S250L |
| Test Condition | 30°C, 80% | |
| Dehumidification Capacity | 180 L/day | 250 L/day |
| Supply Airflow | 1,800–2,200 m³/h | 2,500–2,900 m³/h |
| Fan Type | 2-Speed Adjustable / Stepless Speed Control | |
| Supply Static Pressure | 200 Pa | |
| Return Airflow | 1,800–2,200 m³/h | 2,500–2,900 m³/h |
| Fresh Airflow | 0 | |
| Operating Power | 2,700 W | 4,000 W |
| Operating Current | 4.8 A | 7 A |
| Voltage / Frequency | 380 V / 50 Hz | |
| Control Method | Full-Touch LCD | |
| Electric Shock & Water Ingress Protection | Class I / IPX3 | |
| Noise | <55 dB | |
| Compressor | Panasonic | Daikin |
| Refrigerant | R22 | |
| Heat Exchanger | Hydrophilic Aluminum Foil & Copper Tubing | |
| Drain Pan | SUS304 Stainless Steel | |
| Drain Pipe Diameter | DN32 | |
| Filtration (Optional) | Primary / Medium / High-Efficiency | |
| Purification (Optional) | UV Sterilization / Negative Ions | |
| Fresh-Air Inlet | None | |
| Return-Air Inlet | 500 × 400 mm | |
| Supply-Air Outlet | 356 × 313 mm | |
| Exhaust Outlet | None | |
| Dimensions | 1,370 × 820 × 640 mm | |
| Net Weight | 175 kg | 182 kg |
| Equipment Category | Fresh-Air Single-Flow Haze-Removal Dehumidification Purification System | |
| Model | LT-S380L | LT-S500L |
| Test Condition | 30°C, 80% | |
| Dehumidification Capacity | 380 L/day | 500 L/day |
| Supply Airflow | 3,500–3,850 m³/h | 4,800–5,300 m³/h |
| Fan Type | 2-Speed Adjustable / Stepless Speed Control | |
| Supply Static Pressure | 200 Pa | |
| Return Airflow | 3,500–3,850 m³/h | 4,800–5,300 m³/h |
| Fresh Airflow | 0 | |
| Operating Power | 5,500 W | 9,000 W |
| Operating Current | 10 A | 16 A |
| Voltage / Frequency | 380 V / 50 Hz | |
| Control Method | Full-Touch LCD | |
| Electric Shock & Water Ingress Protection | Class I / IPX3 | |
| Noise | <55 dB | |
| Compressor | Panasonic | Daikin |
| Refrigerant | R22 | |
| Heat Exchanger | Hydrophilic Aluminum Foil & Copper Tubing | |
| Drain Pan | SUS304 Stainless Steel | |
| Drain Pipe Diameter | DN32 | |
| Filtration (Optional) | Primary / Medium / High-Efficiency | |
| Purification (Optional) | UV Sterilization / Negative Ions | |
| Fresh-Air Inlet | None | |
| Return-Air Inlet | 750 × 450 mm | |
| Supply-Air Outlet | 818 × 313 mm | |
| Exhaust Outlet | None | |
| Dimensions | 1,370 × 1,120 × 720 mm | |
| Net Weight | 270 kg | 300 kg |
| Equipment Category | Fresh-Air Single-Flow Haze-Removal Dehumidification Purification System | |
| Model | LT-S750L | LT-S1000L |
| Test Condition | 30°C, 80% | |
| Dehumidification Capacity | 750 L/day | 1,000 L/day |
| Supply Airflow | 7,500–9,000 m³/h | 9,000–11,000 m³/h |
| Fan Type | 2-Speed Adjustable / Stepless Speed Control | |
| Supply Static Pressure | 400 Pa | |
| Return Airflow | 7,500–9,000 m³/h | 9,000–11,000 m³/h |
| Fresh Airflow | 0 | |
| Operating Power | 15,000 W | 21,000 W |
| Operating Current | 26 A | 37 A |
| Voltage / Frequency | 380 V / 50 Hz | |
| Control Method | Full-Touch LCD | |
| Electric Shock & Water Ingress Protection | Class I / IPX3 | |
| Noise | <55 dB | |
| Compressor | Daikin | |
| Refrigerant | R22 | |
| Heat Exchanger | Hydrophilic Aluminum Foil & Copper Tubing | |
| Drain Pan | SUS304 Stainless Steel | |
| Drain Pipe Diameter | DN32 | |
| Filtration (Optional) | Primary / Medium / High-Efficiency | |
| Purification (Optional) | UV Sterilization / Negative Ions | |
| Fresh-Air Inlet | None | |
| Return-Air Inlet | 1,200 × 450 mm | |
| Supply-Air Outlet | 1,058 × 348 mm | |
| Exhaust Outlet | None | |
| Dimensions | 1,700 × 1,642 × 720 mm | |
| Net Weight | 500 kg | 560 kg |