Abstract: A boiler apparatus is provided with a forwardly-opening hinged door. To open the door, the top of the door is moved away from the housing and toward the technician. One or more hinges may be located at the bottom of the door. Since the door does not open sideways, the apparatus requires reduced side-to-side floor space. The door may be used to obtain access to heat transfer surfaces. The door is preferably constructed to minimize the floor space occupied by and required to service the apparatus. The apparatus may include a stand for supporting the boiler at an elevated location for inspection and maintenance. A water tank may be located underneath the boiler.