ST-CTH-C-01
The 5.5 kW cooling version is 1300 × 600 × 520 mm and weighs 145 kg, with 3 kW heating and 3 kg/h humidification. It is the lowest-capacity option where overhead space is limited.
PRODUCT GALLERYST
Product view
Humidifiers & Dehumidifiers
Ceiling-Mounted Constant Temperature and Humidity Unit
Product specifications
| Brand | ST |
|---|---|
| Public model | ST-CTH-C Series |
| Installation | Ceiling mounted |
| Airflow arrangement | Front supply / rear return; alternatives available |
| Power supply | 380 V, 3N~, 50 Hz |
| Humidification | Electrode humidifier; alternatives available |
| Heating | PTC electric heating; alternatives available |
Customization availableSpecifications can be customized to your requirements.
Request a quotation
Specify the quantity and configuration in your inquiry.
Ceiling-Mounted Constant Temperature and Humidity Unit provides coordinated temperature and moisture control while leaving usable floor space clear. The indoor section is installed above the room and connected to supply and return routes, with service access planned around the ceiling structure.
Successive models increase airflow and conditioning duty, and the larger units require greater ceiling depth and structural support. The indoor and outdoor dimensions and pipe sizes in the comparison table are part of the installation choice, not just delivery details.
MODELS AND DIMENSIONS
Available capacity models
| Model | Airflow arrangement | Cooling capacity (kW) | Compressor type | Compressor input (kW) | Compressor quantity | Fan type | Airflow (m³/h) | Noise dB(A) | External static pressure (Pa) | Heating type | Heating power (kW) | Humidification type | Humidification capacity (kg/h) | Humidifier power (kW) | Indoor unit length (mm) | Indoor unit width (mm) | Indoor unit height (mm) | Indoor unit weight (kg) | Outdoor unit length (mm) | Outdoor unit width (mm) | Outdoor unit height (mm) | Outdoor unit weight (kg) | Indoor/outdoor connection | Liquid pipe (mm) | Gas pipe (mm) | Power supply |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ST-CTH-C-01 | Front supply/rear return; other arrangements available | 5.5 | Hermetic flexible scroll | 2.06 | 1 | Low-noise centrifugal | 1500 | 55 | Available to order | PTC electric heating; alternatives available | 3 | Electrode humidifier; alternatives available | 3 | 2.2 | 1300 | 600 | 520 | 145 | 840 | 285 | 610 | 45 | Flare connection | Ø6 | Ø12 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-02 | Front supply/rear return; other arrangements available | 7.5 | Hermetic flexible scroll | 2.2 | 1 | Low-noise centrifugal | 2000 | 55 | Available to order | PTC electric heating; alternatives available | 6 | Electrode humidifier; alternatives available | 3 | 2.2 | 1300 | 600 | 520 | 150 | 880 | 360 | 800 | 55 | Flare connection | Ø10 | Ø16 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-03 | Front supply/rear return; other arrangements available | 12.8 | Hermetic flexible scroll | 4.5 | 1 | Low-noise centrifugal | 3000 | 60 | Available to order | PTC electric heating; alternatives available | 9 | Electrode humidifier; alternatives available | 4 | 3 | 1400 | 750 | 600 | 195 | 930 | 390 | 1270 | 85 | Flare connection | Ø12 | Ø19 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-04 | Front supply/rear return; other arrangements available | 15.5 | Hermetic flexible scroll | 5.2 | 1 | Low-noise centrifugal | 3500 | 60 | Available to order | PTC electric heating; alternatives available | 9 | Electrode humidifier; alternatives available | 4 | 3 | 1400 | 750 | 600 | 210 | 930 | 390 | 1270 | 90 | Flare connection | Ø12 | Ø19 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-05 | Front supply/rear return; other arrangements available | 21.5 | Hermetic flexible scroll | 6.75 | 1 | Low-noise centrifugal | 5000 | 60 | Available to order | PTC electric heating; alternatives available | 12 | Electrode humidifier; alternatives available | 6 | 4.5 | 1600 | 950 | 800 | 260 | 750 | 750 | 1060 | 120 | Brazed connection | Ø16 | Ø22 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-06 | Front supply/rear return; other arrangements available | 26.8 | Hermetic flexible scroll | 9 | 2 | Low-noise centrifugal | 6000 | 62 | Available to order | PTC electric heating; alternatives available | 18 | Electrode humidifier; alternatives available | 6 | 4.5 | 1600 | 950 | 800 | 360 | 930 × 2 | 390 × 2 | 1270 × 2 | 85 × 2 | Brazed connection | Ø12 × 2 | Ø19 × 2 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-07 | Front supply/rear return; other arrangements available | 32 | Hermetic flexible scroll | 10.4 | 2 | Low-noise centrifugal | 7000 | 63 | Available to order | PTC electric heating; alternatives available | 24 | Electrode humidifier; alternatives available | 8 | 6 | 1600 | 950 | 800 | 390 | 930 × 2 | 390 × 2 | 1270 × 2 | 90 × 2 | Brazed connection | Ø12 × 2 | Ø19 × 2 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-08 | Front supply/rear return; other arrangements available | 42 | Hermetic flexible scroll | 13.5 | 2 | Low-noise centrifugal | 9000 | 65 | Available to order | PTC electric heating; alternatives available | 24 | Electrode humidifier; alternatives available | 10 | 7.5 | 1600 | 950 | 1000 | 440 | 750 × 2 | 750 × 2 | 1060 × 2 | 120 × 2 | Brazed connection | Ø16 × 2 | Ø22 × 2 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-09 | Front supply/rear return; other arrangements available | 52.2 | Hermetic flexible scroll | 18 | 2 | Low-noise centrifugal | 12000 | 65 | Available to order | PTC electric heating; alternatives available | 27 | Electrode humidifier; alternatives available | 12 | 9 | 2000 | 1400 | 1000 | 610 | 1460 × 2 | 760 × 2 | 1060 × 2 | 200 × 2 | Brazed connection | Ø19 × 2 | Ø22 × 2 | 380 V, 3N~, 50 Hz, three-phase four-wire |
| ST-CTH-C-10 | Front supply/rear return; other arrangements available | 62 | Hermetic flexible scroll | 20.8 | 2 | Low-noise centrifugal | 14000 | 68 | Available to order | PTC electric heating; alternatives available | 36 | Electrode humidifier; alternatives available | 15 | 11 | 2200 | 1400 | 1000 | 690 | 1460 × 2 | 760 × 2 | 1060 × 2 | 230 × 2 | Brazed connection | Ø19 × 2 | Ø22 × 2 | 380 V, 3N~, 50 Hz, three-phase four-wire |
Final selection requires a room sensible/latent load calculation and confirmation of the air arrangement.
MODEL DIFFERENCES
Which configuration fits the task
ST-CTH-C-02
Cooling increases to 7.5 kW and heating to 6 kW within the same 1300 × 600 × 520 mm envelope. Humidification stays at 3 kg/h, so the change addresses thermal load rather than more moisture addition.
ST-CTH-C-03
This 12.8 kW model moves to a 1400 × 750 × 600 mm unit, adding 9 kW heating and 4 kg/h humidification. Ceiling-void depth and service access must accommodate the larger body.
ST-CTH-C-04
The 15.5 kW version supplies more cooling and airflow in the same enclosure as the 12.8 kW model. Heating and humidification stay at 9 kW and 4 kg/h, while indoor weight rises to 210 kg.
ST-CTH-C-05
At 21.5 kW, the unit is 1600 × 950 × 800 mm and 260 kg, with 12 kW heating and 6 kg/h humidification. It is the largest single-compressor option and uses brazed connections.
ST-CTH-C-06
The 26.8 kW model retains the 1600 × 950 × 800 mm envelope but uses two compressors and weighs 360 kg. Heating rises to 18 kW; the suspension design and two outdoor-unit routes change accordingly.
ST-CTH-C-07
This 32 kW version keeps the same 800 mm body height while increasing heating to 24 kW and humidification to 8 kg/h. Its 390 kg indoor weight and two-compressor layout matter to overhead support planning.
ST-CTH-C-08
The 42 kW model increases body height to 1000 mm and airflow to 9000 m³/h. Humidification reaches 10 kg/h while heating remains 24 kW, addressing a larger cooling and moisture load.
ST-CTH-C-09
At 52.2 kW, the 2000 × 1400 × 1000 mm unit weighs 610 kg, with 27 kW heating and 12 kg/h humidification. This substantial overhead assembly also requires two outdoor units and their pipe connections.
ST-CTH-C-10
The 62 kW version is the largest at 2200 × 1400 × 1000 mm and 690 kg, with 36 kW heating and 15 kg/h humidification. Listed compressor input is 20.8 kW, making both structural support and electrical coordination central to selection.
PRECISION ROOM CONDITIONING
Temperature and humidity control in one system
Cooling and heating
The controller selects cooling or electric heating to correct room temperature around the chosen setpoint.
Humidification and dehumidification
Integrated moisture control corrects both dry and humid conditions without separate portable equipment.
Continuous monitoring
The display, alarms, power-failure memory and RS485 interface support unattended rooms and central supervision.
APPLICATION ENVIRONMENTS
Combined conditioning with an overhead indoor unit
Space-constrained precision workrooms
The ceiling arrangement keeps floor positions available for instruments and people while conditioning room air through ducts.
Archives and collection rooms
Use coordinated temperature and humidity control where an overhead equipment zone and service access are part of the room layout.
Equipment rooms
The indoor unit can serve the required air route while its paired outdoor equipment is located separately.
SELECTION
Resolve the ceiling and duct installation first
Match the housing and supported weight
Higher-duty models change ceiling depth, footprint and structural loading; provide a service opening for the selected unit.
Select the air connection with the required pressure
Front supply and rear return are the listed arrangement; coordinate any alternative and external static-pressure requirement with the duct design.
PROCUREMENT / INQUIRY
Request a
product quotation.
Tell us the quantity and configuration you need. This product will be included automatically.
Fields marked * are required.