Air Handling Unit AL-KO AT4 Complete with Heat Pump

Air Handling Unit AL-KO AT4 Complete with Heat Pump

The new integrated system combining the AL‑KO AT4 Complete air handling unit and the Trane Leaf heat pump brings together advanced ventilation and climate technology in one highly efficient, sustainable solution. It is designed to support future‑ready buildings, lower emissions, and maximize energy savings – across both new construction and existing buildings.

Smart Combination of customized Ventilation System and modern Air-to-Water Heat Pump

AL‑KO Airtech addresses this challenge with advanced air handling systems (AHUs) that intelligently combine indoor air quality, energy efficiency, and operational reliability. One example is the integration of the customized AL-KO AT4 Complete air handling unit with the Trane Leaf air-to-water heat pump. Together, they combine the benefits of a versatile, scalable AHU with advanced heat pump technology, including efficient heat recovery – for modern, low-carbon building systems.

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Integrated AHU System Solution with Heat Pump
AL-KO AT4 Complete & Trane Leaf

Integrated AHU System Solution with Heat Pump

Building owners, engineers, architects, and developers are facing a critical challenge: advancing the electrification and decarbonization of building technology while maintaining economic viability. Innovative air handling solutions such as the AL-KO AT4 Complete play a key role in this transition. They help reduce operating costs, increase energy efficiency, and improve the environmental performance of buildings over the long term.

 

A new highlight in the portfolio is the combination of the modular AL‑KO AT4 air handling unit in the Complete configuration with the high‑efficiency Trane Leaf air‑to‑water heat pump. Available as a fully integrated system, factory-engineered for fast on-site installation and commissioning, and delivered from a single source by AL-KO Airtech.

Your Advantages

AL‑KO AT4 Complete – preconfigured, pre‑piped, and pre‑wired

Trane Leaf heat pump delivered fully mounted on base frame for easy installation

Fast commissioning saves valuable time and reduces installation costs

Certified performance – Eurovent‑validated solution

State‑of‑the‑art air‑to‑water heat pump technology

High‑efficiency, sustainable complete solution from a single source

Customized, Efficient, Built to last
AL‑KO AT4 Complete

Customized, Efficient, Built to last

The AL‑KO AT4 air handling unit series is a modular, highly configurable system designed to deliver exceptional performance across a wide capacity range – from 1,000 to 200,000 m³/h. With more than 100,000 configuration options, the AT4 can be tailored precisely to the architectural and operational requirements of virtually any building.

 

Equipped with advanced fans, high‑efficiency heat recovery, and intelligent control technology, the AT4 ensures reliable, energy‑efficient operation throughout its lifecycle. Its robust construction delivers a service life of more than 25 years, contributing significantly to resource conservation and long‑term CO₂ reduction.

 

The AL‑KO AT4 Complete variant is factory‑configured and preassembled to minimize installation time, reduce interface complexity, and provide high planning reliability for engineers, contractors, and facility managers.

3D Animation

Experience the customized AL‑KO AT4 Complete air handling unit

Benefits and Features

Energy efficiency rating A

Optimized life cycle costs

Optional hygienic design in accordance with VDI 6022

Maximum corrosion protection with galvanized and powder‑coated panels, with stainless steel available as an option

Efficient, Sustainable, remarkably quiet
Trane Leaf

Efficient, Sustainable, remarkably quiet

The Trane Leaf air‑to‑water heat pump uses the natural, environmentally friendly refrigerant R290 (propane), making it a highly sustainable and future‑ready solution for both new construction and retrofit applications.

 

With a Seasonal Coefficient of Performance (SCOP) of up to 4.4 in heating mode and a Seasonal Energy Efficiency Ratio (SEER) of up to 4.8 in cooling mode, the Trane Leaf delivers high efficiency throughout the year. It reduces energy costs, lowers CO₂ emissions, and meets the requirements of numerous regional incentive and subsidy programs.

Benefits and Features

Variable‑speed scroll compressor for exceptionally quiet operation

Aerodynamically optimized EC axial fans maximize airflow and efficiency

Reliable performance down to -20 °C (-4 °F) outdoor temperature

Hot water production up to +78 °C (172 °F)

Cooling operation up to +46 °C (115 °F) ambient temperature

Smart‑Grid‑Ready, enabling integration with intelligent, demand‑responsive energy networks

Innovative, fully integrated HVAC solution
AL-KO AT4 Complete & Trane Leaf

Innovative, fully integrated HVAC solution

The system combination of the AL‑KO AT4 Complete and the Trane Leaf delivers a fully harmonized solution that brings together innovation, energy efficiency, and long‑term sustainability in modern HVAC and air handling applications.

AL-KO Airtech x Trane

Explore our solutions for the medical, pharmaceutical, chemical, and food production industries

Your Advantages

Innovative air handling solution backed by the longstanding expertise of AL‑KO Airtech

State‑of‑the‑art heat pump technology from Trane

Scalable system supporting up to four heat pumps with a combined capacity of 100 kW

Delivered fully mounted on a single base frame and ready for quick connection

Highest energy efficiency as an integrated system

Sustainable reduction of overall CO₂ emissions

Low operating costs and high operational reliability

Expertise You Can Trust

Expertise You Can Trust

“We are proud to offer a climate‑friendly, technically advanced solution that delivers outstanding reliability in both heating and cooling operation. Even under demanding conditions, our integrated system ensures continuous heating performance, meets key incentive requirements – such as a GWP below 150 – and delivers precise, flexibly controlled capacity.

 

Safety is equally essential to us: the use of the natural refrigerant propane near the AT4 Complete air handling unit has been thoroughly validated through independent external assessments. This confirmation reinforces our commitment to developing solutions that are efficient, sustainable, and safe for our customers.”

 

(Martin, Product Manager AL-KO Air Technology)

 

At AL‑KO Airtech, verified quality is a core principle. All product solutions are certified according to recognized industry standards. You can access the certifications for the AL‑KO AT4 series here:

Certified Quality
Your Trusted Partner for Sustainable Air Handling Solutions
AL-KO Airtech

Your Trusted Partner for Sustainable Air Handling Solutions

For more than fifty years, AL‑KO Airtech supports planners, architects, and engineering firms in developing sustainable HVAC and air handling solutions for both new construction and existing buildings. Our customized AHU and HVAC system solutions help reduce CO₂ emissions, lower energy consumption, and make climate‑conscious building design both feasible and economically sound.

 

As part of Trane Technologies, we leverage shared expertise, innovation strength, and advanced technology capabilities – enabling forward‑looking solutions such as the integrated system combination of AL‑KO AT4 and the Trane Leaf.

 

AL‑KO Airtech x Trane – United in Innovation. Committed to Sustainability.

How can we support your project? Our experts are ready to assist you with personalized guidance.


Additional System Solutions from AL‑KO Airtech and Trane

AL-KO AT4 x Trane RTSF HT

Customized process heating and office HVAC solutions

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AL-KO DATA AIRRAY x Trane GVWF

Efficient solutions for Data Centers and Hyperscaler

Go to the YouTube channel

Downloads

AL-KO AT4 AHU-Series – Brochure
AL-KO AT4 AHU-Series – Brochure
Download now
Trane Leaf Air-to-Water Heat Pump – Brochure
Trane Leaf Air-to-Water Heat Pump – Brochure
Download now