Supreme Plumbing and Heating HVAC Specialists in the bay area & Beyond At Supreme Plumbing and Heating, our Bay area heating and air experts have been serving satisfied customers since 2012. We pride ourselves in being one of the leading comfort companies of choice in Northern California. Our goal is to ensure all of our customers are comfortable in their homes, with the best indoor air quality available. Supreme Plumbing and Heating offers an extensive range of home improvement products and services including furnaces, air conditioners, indoor air quality, accessories, service maintenance, and duct cleaning.