Up to 53% off SIMPLY Air Filters + Thermostats at Tools.woot! Ends 5/10 at 10PM PT. Tools.woot! is offering up to 53% off SIMPLY Heat & Air Filters + Thermostats with the discount shown on the product page. Shipping is $6; free for Amazon Prime members. The pictured refurbished Amazon Smart Thermostat is on sale for $33. Posted by Faraday04/11/2026 at 10:38 PM PT