Sen Plex Corporation and its subsidiaries Oahu Plumbing & Sheet Metal, Ltd, Oahu Air Conditioning Company and Oahu Air Conditioning Service, Inc. have earned the reputation of delivering high quality products and service. Our family owned and operated mechanical contracting company has proudly served commercial customers throughout the state of Hawaii since 1945. Oahu Plumbing and Sheet Metal, Ltd. has the experience to manage small to large scale construction and renovation projects and offers expertise from plan and spec to design build. Oahu Air Conditioning Service Inc. provides the highest quality air conditioning service and offer new equipment installation and replacement, preventive maintenance, indoor air quality duct cleaning, and 24-hour emergency service. With offices across the islands, we are available to serve commercial customers statewide.