SIMON d.o.o.


Your Heating Systems Specialist


SIMON d.o.o. is the leading manufacturer of heating substations in Slovenia, providing their clients with complete customer service and support — from project planning and engineering, installation and supervision to support, maintenance and after-sales service.

In addition to the fabrication and installation of heating substations as their core business, SIMON d.o.o. has been leading the way with custom-built distribution units used in heating, cooling and domestic hot water (DHW) production systems, stainless steel domestic hot water boilers and storage tanks, heating and cooling medium storage vessels, hydraulic separators and other boiler-room equipment. All SIMON installations and integrated components adhere to the highest technical standards and guidelines to ensure safe operation, increased durability and longevity.

Plenty of water has run through SIMON d.o.o. heating systems since Simon Virant, the founder, started from scratch in 1997, yet all 26 employees who have joined him one by one in the wake of a steady increase in demand are still on board, more motivated than ever. They are the heart and soul, the driving force of the company, following the latest industry trends to provide you with the best service possible.

Investing in the professional development of their team and the latest technology has resulted in constant innovation and advanced R&D, which enables them to deliver optimal and cost-effective solutions to meet the diverse needs of even the most demanding customers.





We firmly believe that only premium quality, constant innovation, reliability, determination and dedication coupled with a personal approach to clients can bring long-term success. Adamant in achieving our goals while bearing in mind our responsibility to the local and broader social environment, we build long-term relationships with our business partners and stakeholders, providing outstanding customer experience and high value added our clients appreciate and trust.

With our products recognisable by their functionality and individual solutions designed to meet the exacting needs of our clients, SIMON d.o.o. heating systems specialist will continue to develop as an innovative and sustainability-oriented manufacturer of heating substations and heating/cooling technologies, providing ultimate heating, cooling and domestic hot water production services to residential buildings, public facilities or industrial and commercial units at home and worldwide.