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Aprilaire Humidifier Sizing Chart



Model Tight Home Average Home Loose Home


Aprilaire Model 500

3,000 sq.feet 1,500 sq. feet 750 sq. feet


Aprilaire Model 600

4,000 sq.feet 2,000 sq. feet 1,000 sq. feet


Aprilaire Model 700

4,200 sq.feet 2,100 sq.feet 1,500 sq.feet