Ing. Petr Michna is a certified energy specialist licensed by the MIT, operating in Liberec and the entire Liberec Region. He prepares building energy performance certificates (PENB), renovation passports and statutory inspections of heating and air conditioning above 70 kW according to Decrees 38/2022 and 284/2022 Coll.

We have been manufacturing and selling firewood in the Liberec region for 20 years. We also provide logging, approximation and removal of wood mass and other forestry works.

Offering the services of a construction carpenter. We manufacture entrance and interior doors, door frames, single, double and mullioned windows. Also fence panels and fields, stairs and railings.

We are a plumbing, heating and gas company with a tradition. We install new piping as well as repair existing piping. Water, gas, heating, sewerage. We install automatic boiler rooms. We supply both Czech and cheap Polish boilers. We carry out mechanical cleaning and inspection of sewerage, boiler inspections.

I sell honey, bee cosmetics and other honey products.

I provide electrical work including revisions. I also offer elevator installation, locksmith, janitorial and finish masonry work.

We supply the CBA retail network and business units and catering outlets.

We supply to the CBA retail chain and business units and catering outlets throughout Moravia, eastern, northern and western Bohemia.

Our company deals with printing and delivery - e.g. promotional items, t-shirts for groups, ceramics, glass, jerseys, sashes. We offer graphic work - production of business cards, posters and other printed materials. We provide car wraps. We produce advertising signs, information system including graphic design.

We are shortening the distance between hobby and pro in 3D printing. We offer online sales of materials, accessories and spare parts for 3D printers and 3D Printers themselves. We also offer basic courses on working with 3D printers and the Fusion 360 modeling program.

The company is in the business of manufacturing and distributing goods for the end consumer. The Company's portfolio of activities includes the distribution of its own products under the Mr. Serpen and Desovir brand names as well as the distribution of third party branded products.

Operation of a sheltered workshop adapted for the employment of people with disabilities. We provide our assembly services including book repair, document administration and management, website production and administration, pneumatic pressing and much more.