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www.aprilaire.com
IRRITATION AND
DISCOMFORT:
When you heat your
home, indoor humidity
levels fall below the
optimum range. This
causes you to experience
the discomforts of too dry
itchy skin, annoying static
shocks and being “too cold”
at normal temperatures.
UNHEALTHY AIR:
Viruses thrive in low humidity
conditions and can actually
increase the likelihood of
getting colds, flu and other
upper respiratory ailments.
The American Society of
Otolaryngology advises
the importance of preventing
an overly dry environment
because it significantly
increases susceptibility
to infection.
HOME DAMAGE:
When heated air isn’t
properly humidified, it
causes walls and ceilings
to crack and wood floors
and trim to separate.
Expensive musical
instruments can go out
of tune and electronic
equipment can fall victim
to static electric charges,
requiring expensive repair
or replacement.
HIGHER ENERGY COSTS:
Dry air robs the moisture
from your skin, making you
feel colder, which means
you turn up the heat. Dry
air also shrinks the framing
around doors and windows,
resulting in gaps that let in
cold air from the outside,
making your home less
energy efficient.
The air inside your home is drier than you think.
Heating your home dries out the air. The resulting dry air absorbs moisture from
you and everything inside your home. Even newer, tighter built homes will
succumb to the negative effects of air that is too dry.
Every home needs a humidifier.
Relative Humidity (RH) indicates the amount of water vapor, in percent, actually in
the air compared to the maximum amount that the air could hold under the same
conditions. The warmer the air, the more moisture it can hold.
Air in the home heated to 70˚ F can hold about eight grains of moisture per cubic
foot. That is 100% RH. If there are only two grains per cubic foot in the home, this
is 1/4 of the air capacity or 25% RH
So, what happens to the air when it’s heated? Your furnace will bring in outdoor
air to be heated. During the winter months it’s very common to find outdoor RH at
70% and air temperature at +10˚ F. When this air is heated to 70˚ F, the indoor RH
drops to 6%, this is similar dryness to desert conditions. The only solution is to
add water vapor to the air – humidification
Your home could be as dry as the Sahara Desert!