Horizon Heating and Air Conditioning of Hendersonville North Carolina proudly serves the heating, air conditioning, and refrigeration needs of Western North Carolina. In ducted systems, hot air is circulated by means of roof or underfloor ducts, supplying convective heat. Gas heaters and effective reverse cycle air conditioners (or heat pumps) produce only one-third the greenhouse gas emissions of normal electric heaters. Floor outlets are often far better than ceiling outlets for heating, as warm air naturally rises and they deliver heat to exactly where it is most required. Slab heating running costs are especially sensitive to air leakage by means of gaps.