Appleby Systems, established more than 25 years ago, is a home improvement company serving homeowners in the Middle Atlantic States. It offers various services that range from replacement doors and windows and remodeling bathrooms and patios to adding a sunroom. The company does not employ middlemen and subcontractors but uses its own team of professionally trained installers. The company claims a reduction on an annual heating fuel bill with the home replacement of all windows and using its system. The company has developed relationships with various lenders to provide easy terms and reasonable rates for prospective buyers. Appleby Systems is located in Whitehall, Pa.