Jäspi: Finland's Leading Heating and Electric Boiler Technologies
Since 1949, Kaukora Oy has been developing heating and domestic hot water technologies engineered to withstand the harshest Nordic winter conditions. Operating its state-of-the-art manufacturing plants in Raisio and Turku, Finland, Kaukora has manufactured more than 2 million heating units under the renowned Jäspi and Jämä brands. Jäspi represents global benchmarks for operational reliability, peak energy efficiency, and decades-long lifespan across commercial electric boilers, stainless steel hot water cylinders, and heat pump buffer systems. Jäspi products proudly bear the official Finnish Key Flag (Avainlippu) symbol, certifying authentic Finnish design and manufacturing excellence.
Over 70 Years of Engineering Tested in Sub-Zero Arctic Climates
The severe Nordic climate leaves zero room for equipment failure. Finnish manufacturer Kaukora Oy began its journey in 1949 and has grown into one of Northern Europe’s most respected thermal technology pioneers. Every Jäspi product is purpose-engineered to deliver peak performance in sub-zero environments.
Producing over 50,000 premium heating appliances annually and exporting nearly half its output worldwide, Kaukora operates robotic welding lines and automated precision assembly facilities. The prestigious Key Flag Symbol awarded by the Association for Finnish Work guarantees that Jäspi equipment is 100% designed and manufactured in Finland.
Flexible, Zero-Emission Heat Generation for Industry, Commercial Buildings & Backup
Jäspi’s flagship FIL-SPL and FIL-B electric boilers operate as primary heating sources, peak-demand supplements, or robust backup systems for heat pumps in residential complexes, hospitals, airports, metro networks, and industrial facilities. Available in a vast output range from 31.5 kW up to 1600 kW.
Featuring heavy-duty, acid-resistant stainless steel flange electric immersion heaters (< 10.4 W/cm² surface rating) and intelligent microprocessor step-controllers (7, 15, or 30 power stages), FIL boilers ensure smooth, grid-friendly ramp-ups without voltage spikes. Fully compatible with BMS building management systems and remote telemetry.
Jäspi VLM Star & Space-Saving Stainless Steel Water Heaters
Designed to optimize heat pump system performance, the Jäspi VLM Star series integrates expansive heat transfer coils and low standby heat loss monolithic polyurethane insulation to maximize seasonal COP. Its premium stainless steel inner vessel provides decades of resistance against corrosion and aggressive water qualities without requiring sacrificial anodes.
For architectural layouts with tight clearances, such as above drop ceilings or horizontal utility recesses, the Jäspi VLK series horizontal stainless steel water heaters deliver space-saving convenience while upholding pristine hygienic domestic hot water standards.
Trusted Worldwide from Metro Stations to Regional Power Networks
Jäspi electric boilers are trusted in demanding global infrastructure projects: over 100 units operating across metro stations in Saint-Petersburg, Moscow, and Kazan; Olympic facilities in Sochi; the UK National Grid Saltholme substation; and Finland's Zsar Outlet Shopping Center where FIL-SPL units provide heating backup and winter ground anti-icing.
As 3D Enerji, we provide complete engineering design, system capacity calculation, hydronic cascade planning, and authorized technical support for Jäspi electric boilers, heat pump cylinders, and stainless steel hot water heaters.
To explore the Jäspi FIL-SPL commercial electric boiler, Jäspi VLM Star heat pump cylinder, and Jäspi VLK horizontal stainless steel water heater, visit our Jäspi Product Catalog or contact our technical team.