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A total heat recovery fresh-air system is a heat-recovery ventilation device—an improved supply-and-exhaust air system with heat-recovery functionality, developed on the basis of the dual-flow (balanced) fresh-air system. Its operating principle is as follows: both the supply air and the exhaust air are handled by a single host unit (equipped with two fans), and a heat-exchange module is integrated inside the host to rapidly absorb and release heat, ensuring thorough heat exchange between the air streams. The air exhausted to the outdoors and the fresh air supplied indoors exchange heat within this total heat-exchanger. When the indoor exhaust air and the incoming fresh air flow through the heat-exchanger core in a cross-flow (orthogonal) pattern, the temperature difference and water-vapor partial-pressure difference between the two streams on either side of the air-separator plate cause heat and mass transfer as the streams pass through the plate, initiating the total heat exchange process.
| Equipment Category | Fresh-Air Total Heat Recovery Dual-Flow Haze-Removal Dehumidification Purification System |
| Model | LT-E28L |
| Test Condition | 30°C, 80% RH |
| Dehumidification Capacity | 28 L/day |
| Supply Airflow | 320–420 m³/h |
| Fan Type | 2-Speed / Stepless |
| Supply Static Pressure | 100 Pa |
| Fresh Airflow | 320–420 m³/h |
| Exhaust Airflow | 160–210 m³/h |
| Operating Power | 450 W |
| Operating Current | 2 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 | Φ100 mm |
| Return-Air Inlet | Φ100 mm |
| Supply-Air Outlet | Φ100 mm |
| Exhaust Outlet | Φ100 mm |
| Dimensions | 1,124 × 788 × 356 mm |
| Net Weight | 42 kg |
| Equipment Category | Fresh-Air Total Heat Recovery Dual-Flow Haze-Removal Dehumidification Purification System | ||
| Model | LT-E40L | LT-E60L | |
| Test Condition | 30°C, 80% | ||
| Dehumidification Capacity | 40 L/day | 60 L/day | |
| Supply Airflow | 650–780 m³/h | 730–850 m³/h | |
| Fan Type | 2-Speed Adjustable / Stepless Speed Control | ||
| Supply Static Pressure | 100 Pa | ||
| Fresh Airflow | 650–780 m³/h | 730–850 m³/h | |
| Exhaust Airflow | 400–520 m³/h | 500–650 m³/h | |
| Operating Power | 720 W | 850 W | |
| Operating Current | 3.2 A | 3.7 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 | Φ150 mm | ||
| Return-Air Inlet | Φ150 mm | ||
| Supply-Air Outlet | Φ150 mm | ||
| Exhaust Outlet | Φ150 mm | ||
| Dimensions | 1,124 × 788 × 356 mm | ||
| Net Weight | 60 kg | 68 kg | |
| Equipment Category | Fresh-Air Total Heat Recovery Dual-Flow Haze-Removal Dehumidification Purification System | ||
| Model | LT-E100L | LT-E140L | |
| Test Condition | 30°C, 80% | ||
| Dehumidification Capacity | 100 L/day | 140 L/day | |
| Supply Airflow | 1,250–1,400 m³/h | 1,380–1,550 m³/h | |
| Fan Type | 2-Speed Adjustable / Stepless Speed Control | ||
| Supply Static Pressure | 100 Pa | ||
| Fresh Airflow | 1,250–1,400 m³/h | 1,380–1,550 m³/h | |
| Exhaust Airflow | 700–850 m³/h | 820–1,000 m³/h | |
| Operating Power | 1,150 W | 1,450 W | |
| Operating Current | 5 A | 6.5 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 | Φ200 mm | ||
| Return-Air Inlet | Φ200 mm | ||
| Supply-Air Outlet | Φ200 mm | ||
| Exhaust Outlet | Φ200 mm | ||
| Dimensions | 1,124 × 788 × 356 mm | ||
| Net Weight | 78 kg | 82 kg | |
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