Home Amazon Goldbox deals Amazon: Aprilaire 4,200 sq ft Automatic Humidifier Amazon Goldbox deals Amazon: Aprilaire 4,200 sq ft Automatic Humidifier By ARCOM - 25 February 2017 365 0 SHARE Facebook Twitter Amazon Goldbox Deal: List Price: $452.70 Deal Price: $274.99 You Save: $42.72 (13%) Aprilaire 4,200 sq ft Automatic Humidifier Expires Apr 1, 2017