Liberty II Series cast iron oil boilers have new features that permit quicker installation and easier service, says the manufacturer. These include a wide swing-out burner door that provides a large opening to the combustion area for easier cleanout and service. The door also lifts off to make it easier to move the boiler to its setup location. The series is available in hot water and steam models, with and without a tankless coil, in capacities ranging from 0.75- to 3.35-gph oil input. Slant/Fin Corp., 100 Forest Dr., Greenvale, NY 11548; 516-484-2600; (Web site).