Your Office is Comfortable During Coldest Weathe 
While you sit in comfort in your office, are your 
wife and family ////comfortable in a house with a poor 
heating system ? 
Big-Building heating has gone away ahead of home 
heating. Until recently it was better and cheaper in 
every way. 
But now comes the Dunham Home Heating System 
—as perfect for the home as the nationally-known Dun¬ 
ham Vacuum System is for hotels and office-buildings. 
The Dunham System for the home will keep your 
family as warm and comfortable as you are in your 
office, and do it on the smallest possible amount of coal. 
The Dunham System of Heating controls the 
dampers automatically—it never lets the fire burn 
more than is necessary. Overheating as well as under¬ 
heating is prevented. 
The Dunham System is absolutely quiet. No radi¬ 
ator will hiss or pound, drip or spurt. That wonderful 
little guardian of the coal pile—the Dunham Radiator 
Trap — will prevent 
this waste of heat- 
units. 
The Dunham 
Home Heating Sys¬ 
tem will not only 
save you money on 
—But What About 
Your Home ? 
your coal bill, but will enable you to render a real 
service to the Government. The war has made, and 
will continue to make, severe drains upon the Nation’s 
coal resources. Not a ton must be wasted. The 
national supply must be conserved and equitably 
distributed. The Dunham Home Heating System 
will help you help your country. The coal the 
Dunham System saves you will release that much coal 
for war needs. 
Free Booklet. Property owners, tenants, real estate 
men, heating contractors, architects and builders should 
read our latest book, “Dunham Heating for the 
Home. ’’ Send for your copy. 
QUNHflM 
SYSTEM OF HEATING 
Responsible Heating Contractors everywhere 
install the Dunham Home Heating System 
The DUNHAM 
Radiator Trap 
This device is one of the fundamentals 
of the Dunham Home Heating System. 
It is known the world over to heating engi¬ 
neers as the device that revolutionized 
Vacuum steam heating. Leading archi¬ 
tects everywhere use it. 
C. A. DUNHAM COMPANY, Marshalltown, Iowa 
Division Sales Offices: 
Chicago New York San Francisco 
C. A. DUNHAM CO., Ltd., Toronto, Canada 
Also Branches in 34 Cities in United States and Canada 
