HVAC technologies


Kaltra is committed to continuous improvements in its equipment performance and efficiency, and to increase the development of environmentally-safe cooling and refrigeration systems. To achieve these goals, Kaltra invests heavily in its research and development facilities and works closely with several research institutions and laboratories to create the most advanced products based on modern cooling technologies.

Free cooling chiller


Free cooling technology offers remarkable high energy savings and extends the operating limits in applications. Empowered by innovative solutions, our chillers increase opportunities for free cooling and scale up its benefits

Evaporative cooling units


Refrigeration and heat rejection systems engaging the evaporation principle to contribute energy savings by reducing the load on mechanical cooling

Microchannel heat exchangers


Microchannel heat exchangers for condenser, evaporator, and water applications characterized by high heat transfer rates, low internal volume, and compact design – perfectly suitable for high-demanded equipment and applications



Low-GWP, sustainable refrigerants to reduce the environmental impacts of air conditioning and refrigeration systems, including HFO, HFO-based mixtures and natural gases

MCHE assembly

Superhydrophobic microchannel heat exchanger for heat pump performance enhancement

Superhydrophobic coating delays frost formation and makes microchannel heat exchangers a beneficial choice for outdoor evaporators in heat pump systems.
Controlled-atmosphere brazing furnace

MCHE brazing process in detail

Brazing of microchannel heat exchangers: detailed description of state-of-the-art process practiced by Kaltra.
Microchannel evaporator

Refrigerant distribution optimization for microchannel evaporators

Next generation of microchannel evaporators by Kaltra: optimized coil geometry to improve refrigerant distribution and evaporation efficiency.
Microchannel evaporator

Microchannel evaporators: a study for efficiency optimization

Continuing to consider practical modalities to improve the efficiency of microchannel evaporators, Kaltra examined the impacts of refrigerant charge quantity and various configurations of refrigerant gas feeding.
Replacement coil

A quick guide to OEM replacement coils

OEM replacement coils: be your chiller made by York, Trane, Carrier, or another manufacturer, Kaltra offers high-quality, time-proven condenser replacements for long service life.
Industrial dry cooler

Dry cooler selection: what do you need to know?

Dry cooler selection: complete guidelines from unit sizing to optionals, from site planning to maintenance.
Free cooling chiller

Cutting energy costs with free cooling chillers

Discover how to cut energy costs with free cooling chillers and what aspects should be considered when selecting a free cooling system.
Screw chiller

Capacity control for screw-compressor chillers

Capacity control mechanisms for screw-compressor chillers: a comparison for variable frequency drive (VFD) vs. slider valve control.
Microchannel coil

Charging microchannel coils

Recommendations on the correct charging procedure of HVAC systems equipped with microchannel coils - based on the subcooling control.
Microchannel coil

Experimental investigation for microchannel heat exchangers corrosion in the coastal environments

One of the biggest factors of the growing popularity of microchannel heat exchangers is the high corrosion resistance of aluminum, which is achievable through the careful selection of aluminum alloys, surface treatments, and other protective measures.
Cooling plant

Essential chiller maintenance checklist

Chiller maintenance checklist: how to prevent cooling system breakdowns and keep chillers running at peak performance and efficiency.
Controlled-atmosphere brazing furnace

Microchannel heat exchangers: fabrication process

Microchannel coils are a type of heat exchangers made from aluminium by brazing. This article goes through the manufacturing process of microchannel heat exchangers.
Refrigerant distributor

Optimization of refrigerant distribution for microchannel evaporators

Microchannel evaporators with optimized manifold design: uniform refrigerant distribution, improved heat transfer, higher capacity.
Dry cooler

Dry coolers vs. wet cooling towers

Cooling towers are heat-transfer devices that are used to reject heat loads to the atmosphere. Cooling towers are used to cool circulating water in a wide variety of applications such as process cooling and HVAC systems.
Water-cooled chiller

Air-cooled vs. water-cooled chillers

Air-cooled and water-cooled chillers have many similarities but also differences. This article aims to help decide which chiller type suits your needs best.
E-coated microchannel coil

Heat exchanger protection with electrocoating

Electrocoating offers extremely high corrosion resistance for all-aluminum microchannel heat exchangers, making them the most suitable solution for use in extra-corrosive environments.
Serpentine coil

Serpentine coils for compact cooling systems

Microchannel serpentine coils for condenser and evaporator use: low-charge, compatible with HFC/HFO and natural refrigerants, suitable for any applications
Microchannel heat exchanger manufacturing plant

Microchannel coils in single-phase heat transfer applications

Features, advantages, and design considerations of single-phase microchannel heat exchangers for cooling and heating applications.
Evaporatively-cooled chiller

Enhancing air-cooled chiller performance with evaporative cooling

Air-cooled chillers with an integrated E•VAP™ evaporative cooling system: unprecedented power savings for new and retrofit chilled water applications.
Turbocor centrifugal chiller

Highly efficient Turbocor-based chillers

Water-cooled Turbocor chillers offer high-efficient, capacity-matched cooling, high efficiency and low maintenance costs in capacity range from 300 to 4500kW.
Evaporative dry coolers

Hybrid dry coolers: a water-saving cooling solution

Hybrid dry coolers combine the benefits of closed-loop cooling systems and evaporative coolers in a single unit with the approach temperature based on wet bulb.
Microchannel heat exchanger

Microchannel heat exchangers as an advanced alternative to traditional HVAC coils

Advantages and benefits of new-generation microchannel heat exchangers for HVAC applications in comparison to traditional finned tube heat exchangers.
Precision air conditioner

Technology rally: microchannel vs. finned tube evaporator

A comparison for precision air conditioning system with finned tube evaporator and the system with microchannel evaporator: performance and ergonomic acpects.
Cooling plant

Efficiency optimization for cooling plants

Recommendations on cooling plant energy efficiency optimization and chiller sizing during the plant design phase.
In-row cooling

Aisle containment as an approach to data center cooling

Aisle containment approach offers predictable air flows, reduces fan energy, eliminates the hot spots, and expands the opportunities for free cooling.
Microchannel coil

Corrosion protection for microchannel heat exchangers

Corrosion resistance of the microchannel heat exchangers in highly polluted environments; protective coatings and special treatments.
Evaporatively-cooled condenser

Evaporative cooling helps to boost cooling equipment efficiency

Evaporatively-cooled systems as an energy-saving, cost-efficient alternative to traditional refrigeration and heat rejection equipment in hot climates.
Chiller sequencer

Sequence management for chiller plants

Maximizing chilled water plant efficiency with sequence management system: optimization approaches and functions of SMS.
Free cooling chiller

Microchannel coils in free cooling applications

Featuring microchannel heat exchangers as free cooling coils, modern chillers deliver significant energy savings in applications.
Microchannel evaporator

Advanced microchannel technology for HVAC and process cooling

Advantages and benefits of using microchannel heat exchangers for HVAC applications: from high thermal conductivity to improved anti-corrosion properties.
Microchannel heat exchanger

Methods of microchannel coils defrosting

Considering the methods and specificities of defrosting for microchannel heat exchangers: electric defrost, off-cycle defrost, and hot gas defrost.
Microchannel heat exchanger

Microchannel coils add dimension for cooling systems

Microchannel heat exchangers: modern microchannel technology is more robust than the earlier finned tube designs, offering operational, performance and efficiency advantages.
Microchannel heat exchanger

Microchannel coil: fix or replace

Microchannel coils are constructed to reduce size, use less refrigerant, be more durable, transfer heat better and eliminate formicary corrosion.
Microchannel heat exchanger

Formicary corrosion

One of the key advantages of microchannel coils is their resistance to formicary corrosion which causes the majority of leaks in finned tube heat exchangers.
Microchannel heat exchanger

Aluminum coils: recommendations for cleaning

Recommendation on cleaning methods for microchannel heat exchangers.
Microchannel coil

Microchannel coils fast becoming industry standard

The microchannel coil advantages are the future and rapidly becoming the norm because of the many benefits they provide in new HVAC equipment.
Microchannel coil

Microchannel heat exchangers: advantages and benefits

Aluminium microchannel heat exchangers for condenser, evaporator, heat pump, and chilled water applications: features and benefits.