QC Guys, America’s #1 Whole House Fans Denver Colorado, has been Selling and Installing QuietCool Whole House Fans in Southern California for over 13+ years. With the rapid growth and the expansion of our thriving business, we decided to open an office in Denver Colorado. With more than 250 days of sunshine per year, Colorado has pleasant year-round weather. Since the temperature in Colorado gets at a high of 85 degrees or more, having a QuietCool in a home will have you saving money and cutting your air conditioning usage by up to 50-90%. QC Guys are highly skilled and licensed contractors that can guarantee excellent service.