| Great
for energy conservation!
The SG-3500.
Relative Humidity Meter
Get the charge right on your AC system
Studies show that 24% of all
Air Conditioning calls end up in recalls
Introductory from the factory price $521
More than 63% of all AC units are improperly charged
(based on a 2001 study)
A 10 % undercharged AC system consumes
22% more energy.
A 10 % overcharged AC system consumes
18%
more energy.

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