Large or Small, We Do It All! At Keith Schoenwalder Plumbing, Heating & Air Conditioning. Since 1975, we've taken great  pride in doing impeccable work, and we’ve earned our customers’ trust and repeat business by emphasizing customer service and competitive prices. As the premier plumbing and HVAC company, There’s no job too large or too small for our team to take on! From repairs, sump pumps, maintenance and Rinnai furnaces to water heater installation, duct cleaning and tank-less water heaters, our fully licensed, bonded, and insured team can do it! Call today for service.