National Hvac Svc Claim Listing Return to Directory Rating (average) (0) Business Genre Contractor, Plbg Heat AC Business Website Address nationalhvacservice.com Business Address, City PO Box 1500, Seaford ZIP Code 19973 Business Phone Number 3026299400 Business Fax 3026293896 Ratings There are no reviews yet. Please login to leave a review. Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?