Deiter Bros : Fuel Oil, Heating Oil, Heating, Air Conditioning, and HVAC Services in Bethlehem PA, serving the Lehigh Valley, Allentown, Bethlehem, Easton and surrounding areas offering heating oil, fuel oil, hvac, heating, air conditioning, radiant heat, heat pumps, furnaces, fleet fueling, indoor comfort products and other fuel oil and hvac services to the Allentown, Bethlehem, Easton and Lehigh Valley area for over 81 years.