We have been in the heating & cooling business for over 30 years and opened Great Valley Propane (GVP) in 2006, as the sister company of Haly Oil (now Haly Home Comfort). We first started the business when we saw a demand for propane in conjunction with heating oil. Order delivery service for your home or business today! We provide outstanding customer service and you can order propane in a variety of ways or get a discount in combination with heating oil.