From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
combi /kəmbˈaɪ/
[coll.] Gas-Kombiwasserheizer <masc>, Kombikessel <masc>, Kombitherme <fem>, Gas-Kombitherme <fem>, Gastherme <fem>, Therme <fem> [ugs.] [Ös.]
"gas combination boilers" - Gas-Kombiwasserheizer, Kombikessel, Kombithermen, Gas-Kombithermen, Gasthermen, Thermen
Synonyms: gas combination boiler, combination boiler
see: combination boilers, combis