The possibility of mold and mildew grow at humidity 68%+ humidistat can be off 10 points is why it should be set around 58 to 60. Mold and Mildew do not become evident at temperatures even at 90 degrees providing setting are below 68%. Humidistat will save money on Ac costs. For years we have enjoyed savings being away our bill is less than $35. Yes we do have a friend monitor our dwelling from April til November. Prior to installation our thermostat was set at 79 degrees our electric bill had been around $120 monthly. Also we unplug unnecessary small appliances that use power in standby mode tv, radios, vcr/dvd microwave. Also a full refrigerator runs less than an empty one prior to out leaving we fill refrigerator with bottled water for our return
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