Rooftop Retrofit
modernization programme

Get the most out of your existing air handling system!

Rooftops are a thing of the past.
Step into the future of HVAC!

Rooftop systems offer a compact air handling solution for your facility, but they come with several disadvantages that have made them obsolete.

They use too much power, leading to increased
operating costs.

In extreme heat, their performance dramatically decreases, which can lead to system failures.

They use harmful refrigerants that are increasingly
difficult to meet sustainability regulations.

They have a short lifespan,
requiring frequent replacements.

Rooftop Retrofit:
The smart alternative

Developed in partnership with Weger, Oxyma’s Rooftop Retrofit programme offers a highly effective and sustainable alternative to conventional, short-lifespan climate control systems. This plug-and-play solution is designed to seamlessly replace outdated equipment, delivering significant performance advantages through advanced two-stage adiabatic technology.

Energy efficient

Up to 80% lower cooling energy demand compared to conventional systems

Cost effective

A more affordable alternative to traditional rooftop units

Comfort-Optimized

Delivers a stable and optimal indoor climate with a continuous supply of 100% fresh, filtered air

Sustainable

Reduces CO2 output and fully complies with ESG and SDG sustainability standards

Plug-and-Play

No major modifications are required for installation, seamlessly integrating with your existing system

Hygienic

The system components are backed by several hygiene-related patents

Silent

Thanks to the super-efficient EC fans, it guarantees silent operation

Low-impact

Uses water as a refrigerant instead of harmful substances

Profitable

TAO and EKR rebates available, further reducing investment costs

How does it work?
Your System, Our Technology

Our solution perfectly fits into your existing system, maintaining airflow, pressure boost, base frames, and the positions of duct connections.

Installation is as straightforward as replacing a traditional rooftop unit, with added benefits in terms of energy consumption, performance, and sustainability, making it an overall better, futureproof solution.

Solution components

01

WEGER - AHU module

Modernization of Existing Systems

A tailor-made air handling unit fitted for your existing system and facility, with plug & play installation, manufactured in accordance with RLT guidelines, as well as DIN and VDI standards. Naturally, it complies with ERP Eco-Design guidelines and carries EuroVent certification.

Design & construction:

a completely flat interior surface to prevent hidden condensation and ensure proper drainage of condensate water
the built-in components can be made of painted and chlorine- & acid-resistant steel sheets for long-term durability
a thermally separated frame and panel structure, designed to minimize condensation levels
the side wall panels are coated with multi-layer PVC on both the interior and exterior
due to the potential formation of condensate, additional drip trays are installed at critical areas prone to condensation

In case of higher hygiene requirements, the air handling units can be equipped with additional technical features (e.g., thermally separated frame and panel structure, completely flat interior surface with hygienic sealing, externally painted with BACSTOP antibacterial coating, etc.).

02

Oxyma - IntrCooll - IDEC technology

Technology

Air cooler utilizing the nature-inspired, award-winning, and patented two-stage adiabatic technology (SEER >15-30), which we integrate as a pre-cooler into the Weger AHU. This significantly enhances the energy efficiency of the solution and ensures stable operation, even during extreme heat.

The system operates on the principle of natural evaporation of water. In the first stage, cold circulating water is produced through evaporation, and the air is pre-cooled in an air-water heat exchanger. In the second stage, the air is further cooled using the OxyVap wet evaporative media.

Through the two-stage process, the air temperature of the supplied air reaches 19°C under EuroVent conditions (35°C, RH30%), and in warmer, drier conditions (38°C, RH20%), it can even exceed 17°C.

The solution enables achieving an internal temperature of 25°C and a maximum relative humidity of 60% at an external temperature of 35°C, RH30%, all while reducing operating costs by 80-85% compared to traditional compressor-based cooling systems.

Water as a refrigerant

Water is one of the most powerful and abundant refrigerants on our planet, and it has a high enthalpy of vaporization. In two-stage adiabatic systems, 95% of the cooling performance is derived from this evaporation, meaning that significant temperature reduction can be achieved with relatively small amounts of water.

Water also has numerous positive properties, which means our solution does not require climate authority approval, a certified HVAC technician, leak testing, or costly and hazardous HFC and HFO refrigerants for servicing.

Adiabatic cooling, humidification

Why choose the Rooftop Retrofit programme?

It provides unparalleled efficiency

Our system drastically reduces energy consumption for cooling, lowers ventilation costs, and also reduces energy usage for heating. At the same time, it increases cooling capacity, airflow, reduces noise levels, and ensures more stable operation. As a result, it offers the most cost-effective solution available on the market.

It ensures truly sustainable operation

The solution uses a natural refrigerant—water—instead of harmful substances, significantly reducing CO2 emissions and fully complying with ESG and SDG guidelines. Our Rooftop Retrofit modernization programme is not just a product; it’s a truly ecocentric system that can even provide the water for evaporative cooling from recycled water sources.

It requires minimal impact

The Rooftop Retrofit programmes are always tailored to your specific needs, making them Plug&Play and perfectly compatible with your existing system. They integrate seamlessly with your current ductwork, structural framework, heating system, roof penetrations, support frame, and deliver optimal performance in air delivery, pressure boost, and cooling capacity.

It offers a quick ROI

Compared to traditional rooftop units, our solution is available at a more favorable price, yet it delivers significant energy savings of up to 80-85%. Additionally, TAO and EKR rebates are also available for the investment.

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Who have already opted for the Oxyma solution

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