D N HEATING & AIR CONDITIONING operating as a sole owner is licensed in California under CSLB number 944179. The license was first issued in 2010, putting the business at 16 years on the active CSLB roster. It carries a single CSLB classification: C-20 — HVAC Contractor. Records show an active surety bond on file with MERCHANTS BONDING COMPANY (MUTUAL) and active workers' compensation coverage from MID-CENTURY INSURANCE COMPANY. The business is based in BAY POINT, in Contra Costa County, California.