Aquebogue, calverton, jamesport, laurel, manorville, riverhead, south jamesport, wading river. Dmc plumbing & heating today and let’s get started on your project! Most oil boilers use kerosene as a fuel and are floor standing like their gas counterparts, they also come in both combi and heat-only condensing styles. Great professional service very reliable thanks for all your work! All grant.