1. Water supply should be adequate in amount, clean and free from pollution. There should be conveniently located outlets in kitchen, bathroom and cellar and for outside use in watering lawns and gardens. In rural districts or those beyond the reach of municipal water supply the well or spring should be so situated and protected as to avoid contamination. The water should be piped into the house and, if necessary, provision should be made for adequate protected storage. An ample supply of hot water is essential.
2. Modern sanitary plumbing fixtures, noiseless, easily flushed, cleaned and vented, should be provided. All pipes should be of durable type with tight joints and traps readily accessible for cleaning or repairs. Water-closets may be located in compartments separate from the bathroom, well-lighted and ventilated to the outer air. Water-closet accommodations should never be located out-of-doors.
3. Heating appliances should be of such types and sizes as will heat all parts of the house adequately. As there is danger of overheating as well as of underheating it is often desirable to provide for thermostat control. Provision for humidification is also desirable.
4. Artificial lighting should avoid dangers from fire and should not cause eyestrain. Outlets should be sufficient in number and so located as to make it possible to engage in any kind of household activity such as cooking, serving of food, cleaning, play or studying under conditions that are convenient and comfortable. Too intense lighting should be avoided.
5. The refrigerator should be designed for thorough circulation of cold air. Proper insulation requires an efficient heat-retarding material of adequate thickness between inner and outer walls. This material should be compact, non-deteriorating, moisture- and germ-proof and odorless. All parts of the refrigerator should be easily cleaned. Proper drainage should be provided with permanent sewer connection. The drain pipe should be easily accessible for cleaning. For mechanically-cooled refrigerators further requirements are: Quiet, dependable and economical automatic operation; minimum of service maintenance; freezing of water in a reasonable length of time; accessibility for repairs; freedom from wear of moving parts; safety of operation of exterior moving parts, of electrical apparatus or of burners. The refrigerator should be level and should be placed in as cool and protected a position as is compatible with convenient service.
6. Desirable built-in equipment includes also kitchen cupboards, preferably flanking the sink, built-in ironing boards, a passway between kitchen and dining room, china closets, bookshelves, window seats with storage space underneath, shelves and drawers in linen closets, low drawers, cupboards and hooks for children's toys or other possessions in the playrooms or the children's bedrooms. Each of these should be planned with a view to convenience in use.
7. All electric wiring and equipment, including the radio, should be installed according to standard safety practices and certified to by the properly constituted public authorities and by fire underwriters. The installation of electric apparatus near sinks, laundry tubs, bathtubs and lavatories where shock hazards from heedless use are greatest should be avoided. Non-absorptive insulating sockets for fixtures near such conveniences are a wise safety precaution. Fuses and switches should be enclosed and so located as to be inaccessible to children. An ample supply of base plugs and double convenience outlets are desirable and permit maximum service. Hall lights and lights for cellar stairs should be controlled by three-way switches at top and bottom of stairs.
8. Shut-off cocks for gas meters should be accessible and controlled by a locked box and manipulated only by representatives of gas companies. The installation of slot meters should be avoided. Open-flame gas jets are a fire hazard and should not be used. Gas or other open-flame lighting fixtures should not be located near windows or other places where draperies may be hung. Gas ranges or water heaters and gas logs should have direct connection with chimney flues. Hose connections for gas stoves, table lamps and other gas apparatus should be placed several inches away from control cocks for lighting fixtures. Gas ranges should have automatic lighters.