SELID PLUMBING & HEATING INC. Mechanical Contractor serving the Williston area for over 66 years Your local Lennox dealer for all your heating & air conditioning needs. 572-5887 2219 2ND AVE W. Have a safe and healthy school year B255 SCIE SELID PLUMBING & HEATING INC. Mechanical Contractor serving the Williston area for over 66 years Your local Lennox dealer for all your heating & air conditioning needs. 572-5887 2219 2ND AVE W. Have a safe and healthy school year B255 SCIE