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The Aprilaire 45 is the correct replacement water panel evaporator for the following humidifier models:
The Aprilaire 45- 400 Humidifier Water Panel Filter 2p is a two pack of replacement humidifier filters for the Aprilaire 400, 400A, and 400M humidifier models. The Aprilaire humidifier pad is the key component for generating humidity in your Aprilaire 400 humidifier system. These Aprilaire 400 filters should be replaced every six months to achieve the best possible results. The dimensions of the Aprilaire 400 water panel is approximately 10 inches x 12 3/4 inches x 1 3/4 inches.
Aprilaire 45- 400 Humidifier Water Panel Filter 2p specifications:
These are genuine factory replacement Aprilaire 400 evaporator water panel humidifier filters, also known as Aprilaire 45 water panel filters and April Air 45 filters.