$18 $45
Today only. Home Depot has the Filtrete 3M-22 7-Day Digital Programmable Thermostat for $18 with free shipping. Programmable with up to 4 independent periods per day, compatible with most residential heating and cooling systems, and has on-screen filter-change and low-battery indicators.

The Honeywell 7-Day Universal Programmable Thermostat (RTH7500D) is also on sale for $50 with free shipping.
$18 retail: $45
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Domnatr6
Ben's cred: 21
Posted 08/16/2014 at 02:17 PM PT
Posted 08/16/2014 at 02:17 PM PT
Bought one of these the last time it went on sale. Died in less than a year.