Consultants’ Office for Energy and Environmental Technologies

Dipl.-Ing. Dr.techn. Friedrich Lettner
Officially certified and sworn consultant engineer for industrial and mechanical engineering (specialisation: energy and environmental technologies)
Expert witness and generally sworn and certified court expert
Quality control manager with KPC-certificate for heating plants

Registered office: A-8010 Graz (Styria), Körösistr. 66

Branch office: A-4323 Münzbach (Upper Austria), Schulstr. 12

Austria

UID-Nr.: 62881803

Phone: +43 316 232 112 0
Fax: +43 316 232 112 1

E-Mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Web: www.zt-lettner.at or www.arching.at/flettner