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