VRF / VRV systems
Ceiling&floor indoor unit
Tongxing’s ceiling & floor indoor units are designed for VRF/VRV central air conditioning systems in commercial and large residential applications. With DC-inverter compressors and low-noise fan motors, these ceiling/floor-mounted units deliver stable cooling/heating, advanced machine-learning air-filter monitoring, multi-step vertical swing for even airflow, and flexible 2-way installation options. Available in multiple capacities (3.6–80 kW) and refrigerant options (R410A / R32), they are ideal for hotels, shopping malls, schools, hospitals and other venues requiring energy-efficient, quiet indoor climate control. Download datasheet for model specs, sound levels, piping sizes, and packing details — contact us for custom configurations and OEM options.
Discuss your projectProduct specifications.
| Model name | MIH36DLHN18 | MIH45DLHN18 | MIH56DLHN18 | MIH71DLHN18 | MIH80DLHN18 | ||
|---|---|---|---|---|---|---|---|
| Power supply | 1-phase, 220-240V, 50/60Hz | ||||||
| Cooling | Capacity | kW | 3.6 | 4.5 | 5.6 | 7.1 | 8 |
| kBtu/h | 12.3 | 15.4 | 19.1 | 24.2 | 27.3 | ||
| Power Input | W | 16 | 24 | 40 | 42 | 56 | |
| Heating | Capacity | kW | 4 | 5 | 6.3 | 8 | 9 |
| kBtu/h | 13.7 | 17.1 | 21.5 | 27.3 | 30.7 | ||
| Power Input | W | 16 | 24 | 40 | 42 | 56 | |
| Airflow rate3 | m3/h | 564/539/ 514/492/ 467/445/424 | 712/674/ 637/603/ 565/531/500 | 927/883/ 840/794/ 751/707/665 | 1128/1062 /1024/926/ 860/791/729 | 1300/1218/ 1138/1057/ 982/904/824 | |
| Sound pressure level | dB(A) | 32/30/29/28/ 27/26/25 | 36/35/34/33/ 32/31/30 | 43/41/40/38/ 36/34/33 | 43/40/39/37/ 35/34/33 | 45/44/42/40/ 38/36/34 | |
| Sound power level | dB(A) | 43/42/40/39/ 38/38/37 | 47/45/45/43/ 42/41/40 | 54/53/51/50/ 48/47/45 | 54/53/52/51/ 49/48/48 | 55/53/51/50/ 49/46/44 | |
| Unit | Net dimensions (W¨H¨D) | 1069*674*234 | 1069*674*234 | 1069*674*234 | 1284*674*234 | 1284*674*234 | |
| Packed dimensions (W¨H¨D) | 1190*755*313 | 1190*755*313 | 1190*755*313 | 1405*755*323 | 1405*755*323 | ||
| Net/Gross weight | 24.7/29.5 | 24.7/29.5 | 24.7/29.5 | 29.8/34.8 | 29.8/34.8 | ||
| Refrigerant type | R410A/R32 | R410A/R32 | R410A/R32 | R410A/R32 | R410A/R32 | ||
| Pipe connections | Liquid/Gas pipe | mm | 6.35/12.7 | 6.35/12.7 | 6.35/12.7 | 9.52/15.9 | 9.52/15.9 |
| Drain pipe | mm | OD 25 | OD 25 | OD 25 | OD 25 | OD 25 |
| HP | 22 | 24 | 26 | 28 | ||
|---|---|---|---|---|---|---|
| Power supply | V/N/Hz | 380-415/3/50(60) | ||||
| Cooling | Capacity | kW | 61.5 | 67 | 73 | 78.5 |
| kBtu/h | 209.8 | 228.6 | 249.1 | 267.9 | ||
| Power Input | W | 17 | 19 | 21 | 24 | |
| EER | 3.43 | 3.52 | 3.47 | 3.27 | ||
| Heating | Capacity | kW | 69 | 75 | 81.5 | 87.5 |
| kBtu/h | 235.4 | 255.9 | 278.1 | 298.6 | ||
| Power Input | W | 17.6 | 19 | 21 | 24.2 | |
| COP | 3.91 | 3.95 | 3.88 | 3.62 | ||
| Compressors | Type | DC inverter | ||||
| Quantity | 2 | |||||
| Airflow rate | m3/h | 22000 | 21500 | 21500 | 29000 | |
| Refrigerant | R410A | |||||
| Sound pressure level | dB(A) | 62 | 62 | 62 | 63 | |
| Net dimensions (W×H×D) | mm | 1340×1760×825 | 1340×1760×825 | 1340×1760×825 | 1880×1760×825 | |
| Packed dimensions (W×H×D) | mm | 1410×1945×890 | 1410×1945×890 | 1410×1945×890 | 1935×1945×890 | |
| Net weight | Kg | 295 | 315 | 315 | 373 | |
| Gross weight | Kg | 315 | 335 | 335 | 403 | |
| Ambient temp. operation range | Cooling | ℃ | -15 to 55 | |||
| Heating | ℃ | -30 to 30 |
Product Description
Digital display on/off: Indoor unit displays can be deactivated at night, creating a darker environment for sleep.
Quiet operation: The DC-powered fan motor and water pump enable quieter, more energy-efficient operation compared to AC-powered units, ensuring a tranquil and comfortable indoor environment.
Air filter monitoring: The built-in machine learning technology can detect the real-time resistance of the filter screen. It displays the degree of blockage on the controller, ranging from 10% to 100%, to alert technicians when maintenance is required.
Multi-step vertical swing: 5-step, louver vertical-swing feature with automatic setting, uniformly distributes airflow at a wide 35-65· angle for more consistent temperature control.
Parameter
Usage Scenario Description
Hotels, shops, schools, shopping malls, hospitals, etc commercial venues of different sizes
Comparison Module
More flexible, 2-way installation; Auto cooling/heating changeover;
Dual-thermistor control
Achieve optimal indoor comfort with this sophisticated VRF Central Air Conditioning System, designed to provide flexible temperature control through ceiling and floor mounted indoor units that adapt to various architectural layouts. The system features digital display controls that can be deactivated during nighttime hours, creating darker sleeping environments while maintaining precise climate management. This advanced VRF Central Air Conditioning System operates with remarkably quiet performance through DC-powered fan motors and water pumps that reduce noise levels while improving energy efficiency compared to conventional AC-powered alternatives. Building owners and facility managers appreciate the intelligent air filter monitoring that utilizes machine learning technology to detect real-time filter resistance and display blockage percentages from 10% to 100%, providing clear maintenance alerts that optimize system performance and indoor air quality.
FAQS
What applications are ceiling & floor indoor units best for?
They are ideal for hotels, retail stores, schools, hospitals and other commercial spaces where flexible installation (ceiling or floor) and low noise are required.
Which refrigerants and capacities are available?
Models support R410A and R32 refrigerants with cooling capacities from ~3.6 kW up to 80 kW (multiple model ranges). See the datasheet for exact model-by-model specs.
How quiet are these units?
These units use DC-inverter fans and water pumps for lower noise. Typical sound pressure levels range from mid-20s to low-40s dB(A) depending on model and fan speed—refer to the spec table on the page.
What special features do they offer?
Features include digital display on/off (night mode), multi-step vertical swing (5-step), ML-based air filter blockage monitoring (10%–100%), and dual-thermistor control for precise temperature regulation.
How do I choose the right capacity for my room?
Select capacity based on room area/volume, insulation, occupancy and heat loads. For accurate selection, provide project details (floor area, ceiling height, windows) so our engineers can recommend the correct model.