Germany-Places.com has listed approx 4 HVAC contractors in 46147 Oberhausen. Some of the Top rated HVAC contractors in 46147 Oberhausen are- HKL Service GmbH, Gerhard Niehoff Heizungsbaugesellschaft m.b.H., Gerhard Niehoff Heizungsbaugesellschaft m.b.H. & HKL Service GmbH.