_Heating Facilities._--The type of heating apparatus that is used will depend upon the size of the house and its arrangement as well as upon the funds available. The simplest type of heaters are those which do not have a complete system of extending radiation through the home but depend upon circulation of the air within the house to equalize the temperature. In deciding upon the type of apparatus, it is necessary to make sure that the system is as low in original cost as possible; that it will probably have a long life, thereby spreading the first cost over a period of years; that it be economical in operation through efficient consumption of fuel, and that the system be easily controlled. The health of the family and the ability to live in a satisfactory manner will depend to a considerable extent upon the method of heating the home, especially in cold climates. Particular care should be taken to make sure that whatever type of heating is employed is adequate in size. It is more economical to operate a heater that is somewhat oversized than to "rush" one which cannot easily maintain a comfortable temperature in cold weather. Heating engineers and contractors are available to furnish information on heating costs in every locality. The generally used types of heating include stoves, circulator heaters, warm air, hot water and steam systems, and fireplaces. Specialists of the United States Department of Agriculture have developed a great deal of information to enable the home owner to cope with the heating problems in a practical manner. It is estimated by the department that if a two-pipe hot-water system for a six-room house costs $500, the other systems for the same house ordinarily would cost about as follows: Two-pipe vapor system $600 One-pipe steam system $400 A piped warm air furnace $260 Pipeless furnace $140 Circulator heater or stove $ 60 Of course, these systems vary in efficiency and in providing comfort as much as they vary in cost, but these estimates will provide the home owner with an idea of the outlay for taking care of the heating problem. The ability to maintain a satisfactory temperature depends as much upon the construction of the house as upon the heating apparatus itself. Heat is readily lost through walls, roofs and windows. Most houses can be made more comfortable at small cost by applying insulation or by correcting defects in construction. The use of storm doors or storm vestibules where doors are frequently opened to the out-of-doors will prevent drafts and conserve heat. Metal weather stripping is the most effective means of preventing air leaks around windows and doors and making the entire house weather-tight.