Since 1915, Ohler & Holzhauer has served the residents of Ottawa County, Ohio, and the surrounding area. Whether it's plumbing, heating and cooling or air quality, Ohler & Holzhauer has skilled service personnel and the experience to provide you with time-tested quality and personal service.Ohler & Holzhauer also offers 24-hour emergency in-home service and repairs, because sometimes things happen when you least expect it. We will be there to help you out and get things working again.