Though Bay Cities Furnace & Air hasn't been using UV lamps to detect dirt in cooling systems since its inception, the company has an excuse: It was 1904! For more than a century, this company has been selling, installing and repairing all things to keep you warm, cool and healthy. Along the way the company has picked up some of the top technologies for air conditioning and heating systems, including intricate UV light detection tools and digital thermostats. Technicians will come to customers' houses to test indoor air quality and help them decide on an air purification system. All air conditioners, heating units and other products are made by Bryant, named after Charles Bryant, who started Bay Cities Furnace & Air.