Product_news_Daikin_Altherma_4H_in_smaller_capacities
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Product news / Vienna, 5 December2025 – With the new capacity classes of 4, 6 and 7 kW, Europe’s leading hydronic heat pump manufacturer*) expands its air-to-water heat pump series Daikin Altherma 4 H, covering a complete performance range from 4 to 14 kW. This provides suitable solutions for a wide variety of applications, from new builds to renovations.
The hydrosplit units with the natural refrigerant propane (R-290) enable particularly energy-efficient operation. With energy efficiency ratings of up to A+++ for heating and up to A+ for domestic hot water, the series represents a future-proof and economical heating technology based on renewable energy. Sales of the new Daikin Altherma 4 H capacity classes will start in January 2026.
From renovation to new buildings
The Daikin Altherma 4 H series delivers reliable heating, cooling, and domestic hot water even in extreme conditions, operating down to -28 °C and achieving leaving water temperature of 70˚C without an electric backup heater. This makes it ideal for replacing gas boilers and supporting traditional radiator systems while ensuring year-round comfort. With the new compact sizes, Daikin expands its comprehensive heat pump portfolio also for new-builds – from small apartments to single- and multi-family homes.
Three indoor unit options
Daikin offers maximum flexibility with three indoor unit options: a floor-standing unit with ECH₂O thermal storage, a compact floor-standing unit with low height and integrated domestic hot water tank, and a wall-mounted unit. The unique ECH₂O tank ensures optimal hygiene for domestic and drinking water. All three indoor units are among the lightest in their performance class, making transport, handling, and installation significantly easier.
Compact outdoor unit with optimized design
The Daikin Altherma 4 H 4, 6, and 7 kW outdoor units feature a modern design. With clean lines and a silver-colored housing paired with a matte black front grille featuring curved fins, it fits seamlessly into any setting. The newly designed housing is particularly compact at 1220 x 958 x 535 mm, allowing easy and flexible placement even in smaller spaces. Its low weight of just 109 kg also simplifies transport and installation.
Easy and intuitive control
A 5” color touch screen ensures intuitive control of the Daikin Altherma 4 H on site, including a time manager. With the Daikin Onecta app users are able to monitor the unit’s energy consumption and adjust home temperature settings on a room-by-room basis.
Innovative safety components
The new, smaller capacity classes of the Daikin Altherma 4 H are also equipped with the innovative safety components of the series: these include an integrated refrigerant vessel for safe transport and reliable installation, a newly developed and highly efficient R-290 gas separator, and a fully sealed switch box that prevents refrigerant ingress and ensures a clear separation of electrical and refrigerant circuits.
The compatible wall-mounted and floor-standing indoor units also feature integrated safety functions, providing additional protective mechanisms depending on the model. This safety and efficiency concept is complemented by the Daikin compressor specially developed for R-290. Precisely matched to the thermodynamic properties of propane, it delivers high flow temperatures even at low outdoor temperatures and ensures stable, long-lasting operation.
Installation without refrigerant work indoors
A key advantage of the Daikin Altherma 4 H series is the hydrosplit setup: the refrigerant remains entirely in the outdoor unit, so no work with refrigerant is required inside the building – only the hydraulic connections need to be installed indoors.
Made in Europe for Europe
All air-to-water heat pumps of the Daikin Altherma 4 H series, including the new capacity classes, are developed and manufactured in Europe. Regional production ensures highest EU quality standards as well as short delivery routes and times.
More benefits of the Daikin Altherma 4 H heat pump
- Wisper-quiet operation
The Daikin Altherma 4 H runs whisper-quiet at only 28 dBA at three meters distance. This makes the new models particularly suitable for city homes and noise-sensitive environments. - Maximum efficiency, minimal bills
Rated A+++ for heating, it delivers hot water up to 70°C while cutting energy costs year-round. - Reliable heating in any weather
Performs flawlessly even at -28°C. Ideal for both renovations and new builds. - Eco-friendly & future-ready
Powered by R-290 refrigerant with ultra-low global warming potential (GWP).
Reference:
*) BRG BUILDING SOLUTIONS – June 2025 report / data 2024
Copyrights pictures: Daikin
About
100+ years Daikin
The story of Daikin has always been shaped by groundbreaking ideas, technological innovations, and dedicated people. It began in 1924 when the young Japanese engineer Akira Yamada founded an enterprise in Osaka to manufacture aircraft radiators with a 15-member team. More than 100 years later, the Daikin Industries group brings future-proof solutions for heating, cooling, ventilation, air purification, and refrigeration (HVAC-R) to global markets. 103,500 employees in 173 countries continue the company's legacy of leading technologies to advance low carbon heating and cooling, while ensuring the highest level of comfort.
Read more on 100 Years Daikin
Daikin Industries Ltd.
Daikin Industries is a global leader in heat pump, air conditioning and air filtration technology, employing more than 103,500 people. Founded in Osaka in 1924, it is the only manufacturer in the world that develops and manufactures HVAC-R equipment, compressors and refrigerants in-house. Daikin has been recognized as one of the world’s top 100 most innovative companies by Clarivate (UK) and LexisNexis (USA) for its leadership in technology research and intellectual property patents. For its fiscal year 2024 (1 April 2024 – 31 March 2025) Daikin reported a record sales result of 28,98 billion euro sales.
Read more on www.daikin.com
Daikin Europe N.V.
The Daikin Europe group is a leading provider of heating, cooling, ventilation, air purification and refrigeration technology across Europe, the Middle East, and Africa. Daikin Europe caters to a diverse customer base within the region by designing, manufacturing, and marketing an extensive range of products, maintenance services, and turnkey solutions tailored for residential, commercial, and industrial applications. The group employs over 13,800 people across more than 56 subsidiaries and operates 15 manufacturing sites in Europe (12), Turkey (1) and the Middle East (2). Refrigeration products from Daikin include the brands Daikin, Tewis, Zanotti, Hubbard, and AHT. Headquartered in Ostend, Belgium, for over 50 years, the Daikin Europe group is a subsidiary of Daikin Industries Ltd.
Read more on www.daikin.eu
Daikin Airconditioning Central Europe
Daikin Airconditioning Central Europe, founded in 1999 with its headquarters in Vienna, Austria, operates as a subsidiary of Daikin Europe. Its portfolio includes products and total solutions for heating, cooling, ventilation, air purification, and refrigeration in residential, commercial, and industrial settings. With over 700 employees and 3,400 partners, the company manages sales and service activities across 16 countries in Central and Eastern Europe, including Austria, Albania, Bosnia and Herzegovina, Bulgaria, Croatia, the Czech Republic, Hungary, Kosovo, Montenegro, Moldova, North Macedonia, Poland, Romania, Serbia, Slovakia, and Slovenia.
With 'Your Daikin World' at the Vienna headquarters and the 'Daikin Inspiration Park' in Warsaw, the HVAC-R industry and the construction sector have access to two state-of-the-art B2B-experience centers for co-creating customized solutions for hotels, retail, offices, and large commercial applications. Daikin runs ten out of 141 B2B-training centers across the EMEA region in the CE-region. Consumers and homeowners receive consultations at four B2C-Experience centers in Vienna, Belgrade, Bratislava and Budapest.
Read more on www.daikin-ce.com
Media contact
Doris Passler
Manager Corporate Communications Central Europe
Daikin Airconditioning Central Europe HandelsgmbH
Lemböckgasse 59/1/1, 1230 Vienna, Austria
T: +43 (0) 664 24 56 444
M: passler.d@daikin.at
