Water chiller
Produces chilled water, typically 7/12 °C, for cooling rooms and equipment. From compact units to screw chillers above 1 MW.
WhenWhen you only need cooling or heat with another source.
- KOMP-R
- Industrial cooling
- Industrial air conditioning
MTAIndustrial air conditioning
Cooling and heating for buildings. Efficient all year.
MTA water chillers, heat pumps and free-cooling modules for production halls, office buildings, hospitals and data centres – from 6.5 to 1,303 kW, including the natural refrigerant R290.
- air conditioning series
- 9
- nominal cooling capacity
- 6.5–1,303kW
- hot water with the iCYGNUS N heat pump
- 78°C
- natural refrigerant R290 in three series
- 3GWP
Three kinds of units
Chiller, heat pump or free cooler?
All three produce water for the HVAC system – fan coils, air handling units or chilled ceilings. They differ in whether they can also heat and how much energy they use.
Heat pump
A reversible unit cools in summer and heats in winter – and produces domestic hot water up to 60–78 °C. One source for the whole year.
WhenWhen you replace a boiler or want cooling and heating from one unit.
Free cooler
When it is colder outside than the return water, the ambient air cools it without a compressor. Works together with a chiller and takes over part or all of the load.
WhenFor year-round cooling – data centres, server rooms, processes.
MTA range
Find the right series
Set the cooling capacity you need and the filters. The series that cover your duty point are shown.
Your requirements
1 kW1,500 kW
Unit type
Matching series: 9
Heat pump · Air
iCYGNUS N
6.5–51.8kWRefrigerant: R290
More about the unit
Heat pump · Air
HAEevo Tech
12.8–88.4kWRefrigerant: R410A
More about the unit
Free-cooler · Air
FC4TAE / FC4ALL
18–407kWMore about the unit
Heat pump · Air
iCYGNUS G HP
18–49kWRefrigerant: R454B
More about the unit
Heat pump · Air
GEMINI G HP
49.8–116kWRefrigerant: R454B
More about the unit
Water chiller · Air
TAURUS G
72–143kWRefrigerant: R454B
More about the unit
Water chiller · Air
ARIES N
165–240kWRefrigerant: R290
More about the unit
Water chiller · Air
ARIES N iASN
170–320kWRefrigerant: R290
More about the unit
Water chiller · Air
ARIES G
228–1,303kWRefrigerant: R454B
More about the unitNominal values to EN 14511. Actual capacity depends on water and ambient temperatures – we prepare the exact selection for your process.
Technology
Less energy, less noise, less environmental impact
An HVAC system runs at part load for most of the year. That is why seasonal efficiency, quiet fans and low-GWP refrigerants matter.
Inverter
Variable-speed compressors follow the actual demand. At part load they use much less energy and avoid constant cycling.
iCYGNUS N · iCYGNUS G HP · ARIES N iASN
Natural refrigerant R290
Propane has a GWP of 3 and does not harm the ozone layer. It makes the units ready for the stricter requirements of the F-gas regulation.
iCYGNUS N · ARIES N · ARIES N iASN
Heat recovery
Partial or total recovery of condensing heat for domestic hot water or other users – heat that would otherwise be lost to the ambient.
ARIES N · ARIES N iASN · ARIES G · GEMINI G HP
Two independent circuits
Larger units have two independent circuits with tandem or trio compressors. If one circuit fails, the unit keeps cooling.
ARIES N · ARIES N iASN · ARIES G
Low-noise versions
Acoustic versions with an insulated compressor compartment and slower EC fans for urban sites, hospitals and hotels.
TAURUS G · ARIES N · ARIES G · iCYGNUS G HP · GEMINI G HP
BMS connection
Modbus RS485, BACnet and Ethernet for integration into the building management system and remote monitoring.
ARIES N · ARIES G · TAURUS G · GEMINI G HP · iCYGNUS G HP · HAEevo Tech
Comparison
All air conditioning series
Cooling and heating capacity, hot water temperature and refrigerant. Click a series to open its product page.
| Series | Type | Cooling capacity | Heating capacity | Max. hot water | Refrigerant | Compressor | Highlights |
|---|---|---|---|---|---|---|---|
| MTA iCYGNUS N | Heat pump | 6.5–51.8 kW | 8.4–66.3 kW | 78 °C | R290 | scroll | Inverter, Natural refrigerant |
| MTA HAEevo Tech | Heat pump | 12.8–88.4 kW | 11.1–84.3 kW | 55 °C | R410A | scroll | Evaporator-in-tank |
| MTA FC4TAE / FC4ALL | Free-cooler | 18–407 kW | – | – | none (water/glycol) | – | Free-cooling |
| MTA iCYGNUS G HP | Heat pump | 18–49 kW | 23–59 kW | 60 °C | R454B | scroll | Inverter |
| MTA GEMINI G HP | Heat pump | 49.8–116 kW | 54.6–130 kW | 60 °C | R454B | scroll | Low GWP |
| MTA TAURUS G | Water chiller | 72–143 kW | – | – | R454B | scroll | Low GWP |
| MTA ARIES N | Water chiller | 165–240 kW | – | – | R290 | scroll | Inverter, Natural refrigerant |
| MTA ARIES N iASN | Water chiller | 170–320 kW | – | – | R290 | reciprocating (inverter) | Inverter, Low noise |
| MTA ARIES G | Water chiller | 228–1,303 kW | – | – | R454B | screw | Low GWP |
Capacities: nominal range of the series per EN 14511 (cooling 12/7 °C at 35 °C ambient). – = not applicable to this kind of unit or available on request.
Refrigerants
The refrigerant decides the future of the unit
The EU F-gas Regulation (2024/573) is gradually restricting high-GWP refrigerants. For a new system that will run for 15 years or more, the refrigerant is therefore an important decision.
- R290 (propane) – natural refrigerant with a GWP of 3
- R454B – low GWP, replaces R410A
- A lower-GWP refrigerant means fewer restrictions on service and top-ups
GWP of refrigerants in the MTA range global warming potential, 100 years
R2903
TAE N MINI, iCYGNUS N, ARIES N, ARIES N iASN
R454B466
TAE G, CYGNUS G, NEPTUNE G, ARIES G FC, iCYGNUS G HP, GEMINI G HP, TAURUS G, ARIES G
R513A631
TAE G Compact, TAE G
R449A1,397
TAEevo LWT
R134a1,430
TAEevo Tech MINI
R410A2,088
TAEevo Tech MINI, TAEevo Tech, TWEevo Tech, HAEevo Tech
GWP values per Regulation (EU) 2024/573, Annex I. Below each refrigerant are the MTA series that use it.
Applications
Where MTA air conditioning systems work
From production halls to hotels – every building has its own load profile, noise requirements and heating needs.
Production halls
Cooling of large spaces and air handling units, often combined with process cooling and heat recovery.
Data centres
Year-round cooling with redundancy and free cooling, which covers a larger share of the load in colder months.
Office buildings
Heat pumps for cooling and heating, fan coils and chilled ceilings, BMS integration.
Hospitals
Reliable air conditioning of operating theatres, laboratories and wards – with two circuits or stand-by units.
Hotels
Low-noise versions, domestic hot water from the heat pump and heat recovery for pools and wellness.
Shopping centres
Inverters for large spaces with strongly varying loads throughout the day and the year.
Server rooms and telecoms
Smaller high-availability units for server rooms and telecommunication nodes.
Residential buildings
R290 heat pumps for heating, cooling and domestic hot water in apartment buildings.
KOMP-R + MTA
From calculation to service
A chiller is only part of the system. KOMP-R takes care of the whole – with original parts and MTA factory support.
- 1
Calculation and selection
From your data (kW, temperatures, fluid, operation) we select the series and version, with free-cooling where it pays off.
- 2
Hydraulics and installation
Pumps, tanks, glycol, pipework and outdoor or indoor installation.
- 3
Commissioning
Setting up control, protections and supervision, and handover with operating instructions.
- 4
Service and maintenance
Regular inspections, condenser cleaning, leak checks and fast delivery of spare parts.
FAQ
Questions about industrial air conditioning
What is the difference between a water chiller and a heat pump?
A water chiller only cools. A heat pump is reversible: it cools in summer, heats in winter, and some versions also produce domestic hot water. If the building is heated by a boiler or district heating, a chiller is enough; when renewing the heating, a heat pump is often the better choice.
How large a system do I need?
We start from the building heat loads – floor area, glazing, occupants, equipment and location – or from the data of the existing system. As a guide, offices often need 60–100 W of cooling per m², but the exact capacity comes from a load calculation.
Why the natural refrigerant R290?
R290 (propane) has a GWP of 3, so the F-gas regulation does not restrict it the way it restricts synthetic refrigerants. It is very efficient but flammable, which is why MTA uses it in units for outdoor installation with appropriate safety measures.
What do SEER and EER mean?
EER is the ratio of cooling capacity to electrical input at one rating point. SEER covers the whole season, when the unit mostly runs at part load – so it better reflects real running costs. Inverter units have the advantage at part load.
Can the cooling be integrated into the existing building management system?
Yes. MTA units support Modbus RS485, and larger series also BACnet and Ethernet. You can monitor them from the BMS and receive alarms remotely.
When does free cooling pay off?
When you also need cooling in winter – in data centres, server rooms or with a process load. With a higher return water temperature, the number of hours when ambient air is sufficient is high in our climate. We calculate it for your location.
Other division
Process cooling
Chillers for machines, moulds and processes – from 1.7 to 695 kW, down to −24 °C and with ±0.5 °C control. Including a cooling load calculator.
Open divisionAll about MTA industrial cooling
Both divisions, a comparison of all 19 series, free cooling and our services in one place.
Industrial cooling
Describe your process and we will propose the right solution.
Fill in a short form and we will prepare a configuration proposal based on load profile, environment, and energy efficiency goals.
Sizing based on real operating loads
Energy consumption optimization
Supply, installation, and service
Where to find us
DirectionsPod lipami 4 · 1370 Logatec, Slovenija