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Marioff Delivers HI-FOG® Electric Pump Unit to Mikkeli Central Hospital
7 April 2017

Marioff has delivered its first installation of its new HI-FOG® Electric Pump Unit (EPU) high-pressure water mist fire suppression system, which is now in use at Mikkeli Central Hospital in Finland. The installation was part of a three-year, EUR 100 million renovation project. Marioff, a leading developer of water mist fire protection technology, is a part of UTC Climate, Controls & Security, a unit of United Technologies Corp. (NYSE: UTX).

The new HI-FOG® EPU revolutionizes high pressure water mist fire suppression with its advanced control system, simplified mechanical design and optimized use of space. The pump unit was adjusted to the customer’s needs by including a separate frequency converter for each motor to reduce the start current peak. Because of this, it was possible to reduce the backup generator to make it a cost efficient solution that still ensures operational reliability in case of power outage.

“The HI-FOG® system can scale up to protect new areas and buildings using the same pump unit,” says Jaakko Kääriäinen, business unit manager, Marioff, Finland. “This means the customer doesn’t have to invest in new pump units when expanding, making the HI-FOG® system a cost-efficient solution for growing facilities.”

The renovation, reconstruction and extension of the Mikkeli Central Hospital campus in Finland will be implemented in five phases, with the goal of replacing the existing infrastructure with integrated, modern facilities and consolidating the offering of in- and outpatient healthcare and social services on a single site. The entire project is estimated to be completed in 2020 with an estimated cost of EUR 105 million. Once completed, the new Mikkeli Central Hospital campus will enjoy 18 800 gross square meters of new space and 22 500 gross square meters of renovated area.

Marioff has received a second order from the hospital to extend the HI-FOG EPU system to new areas. The same pump unit will serve the entire integrated system. The extension expands Marioff’s existing on-site fire protection capabilities. A Marioff HI-FOG® system now protects the extended main entrance and reconstructed polyclinic.

For more information about the new HI-FOG® EPU, visit

First HI-FOG® EPU installed to Mikkeli Central Hospital
Marioff’s HI-FOG® Electric Pump Unit at the Mikkeli Central Hospital

About Marioff and HI-FOG®
Marioff is a leading developer of water mist fire protection technology and supplies system solutions worldwide. The company’s innovative HI-FOG® water mist fire protection system safely controls and suppresses fire using significantly less water than conventional sprinkler systems, reducing water damage, cleanup time and operational downtime. Marioff is a part of UTC Climate, Controls & Security, a unit of United Technologies Corp., a leading provider to the aerospace and building systems industries worldwide.