Serving the Central Pennsylvania Region since 1981, Haller Enterprises provides a full range of plumbing, heating, cooling, e ... lectrical and water conditioning services for residential and commercial customers. From a service call for a clogged drain to replacing electric panels or zoning your heating/cooling system, Haller’s highly trained technicians and friendly staff are here to make your life easier. One call … handles it all. PA Contractor #PA1867 read more