1. Gertificate
We hereby confirm that
Mr. Djerdj Bukovic
TopTherm
has successfully attended the
Service Workshop
o AdiaVent@
o TopVent gas@
o RoofVent@ condens / direct cool I EX
o DigiNet 5 / TempTronic RC
Mr. Djerdj Bukovlc is a certified service engineer
for commissioning and servicing Hoval lndoor
Climate Systems.
Vaduz, May 2008
Hovalwerk AG
Austrasse 70
9490 Vaduz
Stephan Eder
Director Ventilation
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Büchel ,. '','.''..i.*
Project Engineer.rt..,.1 l,l-i:irl " --t
lndoor Climate Systems lndoor Climate Systems'r' "