The Sunday herald and weekly national intelligencer., 1891-04-19
STEAM AND Hor.wArER HEAT.
The Prejudice Against the Former is
Rapidly DYING Out-Ventilation.


Rapidly Dying Out-Ventilation.
The prejudice against steam heating,n
remarked Mr.. Zellers of the firm of Zellers &
Co., of 1889 Fourteenth street, ''while never
great, is rapidly growing less and less every
day. There never was any ground for it, and
the perfection to which the system of steam
heating has been brought has made it the most
desirable system for large buildings in the East,
North, and West, where the temperature is
excessively low in winter. Hot-water heating
is also growing in popular favor, and the
orders for this kind of apparatus are constantly
increasing. 1t is splendid system for private
residences OF small buildings, but unquestion-
ably steam is the better for the larger ones, al
hough in many of the latter hot water is used,
and gives entire satisfaction. Many boilers are
now constructed so as to supply either steam
or hot water through the radiators
''How is the water forced from the boilers
into the the heating apparatus ?'wss asked.
Water" replied Mr.. Zellers, commences
to circulate in the apparatus as soon as it
takes heat from the fire. When heated, as of
course you know, water begins to expand, and
the moment it expands It circulates. While
there is a difference in the degrees of heat
supplied by steam and hot water, the tempera-
turc OF the hot water can be altered to suit by
merely opening the doors of the furnace or
closing them. Another appliance of much
service in regulation is the air valve attached
to the latest pattern of radiators, which.
acting like screw, controls the admission of
steam into the different divisions of the heater.
Thus screwed to a certain gauge one division
is filled with steam, and so on through the
various gauges until as many as desired are
filed. This is a very comfortable arrangement
for such varying climate as ours, and is much
used.
The use of hot water is not new. 1t was
adopted and afterward abandoned in Boston
some years ago. Now, however, many people
seem inclined to regard it as new invention.
The Suffolk County courthouse in Boston is
Principally heated by the hot-water system,
the same as the Treasury, State, War and
Navy, and Post Office Departments here, and
the court-houses at Cincinnati, st. Louis, and
Chicago. SO will be the law school of the
Georgetown University, where system
known as the direct-indirect will be used.
This is system which supplies heat when
needed, besides ventilation and cold air when
the hot season arrives. This is accomplished
by fues running from the outside of the
building and connecting with the system in
side. Cold air causes the warmer, which is
lighter, to rise and SO by the introduction of
this coldness the hot air is forced from the
rooms by means of communication of the fiues
with registers. This is similar to a plan
Of cooling and ventilation invented by
Philadelphia man, which is known as the
Denslow heater.
'Much more attention than formerly is now
paid to ventilation, and devices for this pur-
pose are constantly sought. Mr. Chappelle,
member OF our firm, has an idea for ven
ulator and cold-air supplier for large build
1ngs where high pressure of steam is re-
quired to run the elevator. This is a great
fan, which, by its rapid revolution-the high
pressure being necessary to drive the fan with
sufficient force-will send drafts of cold air
up and distribute the same through flues and
registers