MANUFACTURED GAS IN THE HOME. 
13 
FLUELESS HEATING STOVES ALWAYS DANGEROUS . 14 
There are many so-called “ odorless,” “ smoke-consuming,” and 
“ chimney less ” gas-heating appliances in use. These are always dan- 
gerous and a positive menace to health, and ought never to be used. 
The gas industry should grow and meet the increasing future 
demands of incidental house heating. This desirable growth, however, 
may be retarded by untruthful claims that flues for room and water 
heating devices are not needed. Much depression and lassitude of 
spirit, lower vitality, and hence less resisting power to the ever- 
present disease germs may be traced to gas fumes from flueless gas- 
heating stoves. These vitiated room air conditions must be prevented 
if there is to be an increasing use of manufactured gas for heating 
service. 
FLUELESS HEATING STOVES MORE DANGEROUS THAN FLUELESS COOK STOVES. 
In the kitchen the cook stove is seldom used for more than one hour 
at a time. The volume of steam from the cooking food will be much 
greater than the volume of the combustion products from the gas, 
and the steam alone will make ventilation necessary. 
The person in the room will be constantly moving about, with head 
4 to 5 feet above the floor level, and in all probability the kitchen door 
will be opened several times during the cooking, thus increasing the 
ventilation. 
In contrast with this condition, when a heating stove is used in a 
bedroom or bathroom, the period of use is much longer, the ventila- 
tion is less, the person in the room will be quiet with head closer to 
the floor, and the doors will probably, at least in the bedroom, not be 
opened or closed. Furthermore, a flueless stove properly adjusted at 
9 o’clock in the evening, when the person goes to bed, may become 
a carbon-monoxide generator several hours later, due to deflection 
of the flame or small change in pressure, when the person is asleep. 
Hoods over open-top kitchen stoves, of course, are always desirable. 
BLUE-FLAME BURNERS. 
Manufactured gas, to be burned in large volume, must have some 
of the air mixed with the gas before the gas reaches the flame. This 
is the fundamental principle of the Bunsen or blue-flame type of 
burner. The air taken in to form the mixture is called the primary 
air, and will usually be only a small part of the total air required. 
The rest of the air necessary for complete combustion, called the sec- 
14 During the first 10 weeks of the winter in 1922 and 1923 there were 81 asphyxia- 
tions from flueless gas stoves in Ohio, of which 34 were fatal. All of these accidents 
would have been prevented by the use of proper flues. On Dec. 8, 1922, the Ohio State 
Department of Health issued a radio broadcast warning on this subject. 
