Numac Heating and Cooling is located in Roseville, CA. Whether it's a conditioning repair or replacement of an existing gas furnace, oil furnace, air conditioner or heat pump or the design for a new system, we'll help you understand your choices and make the one that provides the comfort you seek. Because after all, that's what real value is...comfort. Comfort in your home's indoor environment. Comfort in your choice of equipment to provide it.