This four-inch IC rated housing is suitable for new construction in residential and commercial applications and for direct contact with insulation. Integral thermal guards protect against improper lamping and misuse of insulation materials with lamp wattage ratings and apertures based off trim selection. The airtight housing limits the exchange of air between ceiling plenum and heated/cooled areas. The housing adjusts from 1/2" to 1 1/2" to accommodate ceiling thickness and its 6" height allows it to be used in 2"x8" joist construction.4" Airtight Housing ICInput Voltage: 120VCertifications: cULus Damp Airtight ICAirtight housing limits exchange of air between ceiling plenum and heated/cooled areasTransformer includes thermal protector guards against lamping and misuse of insulation materials4" Airtight Housing ICSuitable for new construction in residential or commerical applicationsLine voltageIC rated. Suitable for direct contact with insulationListed for through branch circuit wiring and includes several 3/4" knockoutsSupplied with three push in wire connectorsFour pryouts with integral strain relief simplify Romex installationHousing is secured to plaster frame with screws and can be removed for access to junction boxHeavy-gauge hanger bars provide greater stability, allowing housing to be positioned at any point within a 24" joist spanAirtight housing limits the exchange of air between ceiling plenum and heated/cooled areasWashington State Energy Code approved to meet restricted airflow requirementsJunction BoxListed for through branch circuit wiring and includes several 3/4" knockouts. Four pry-outs withintegral strain relief simplify Romex installation.Supplied with three IDEAL push-in wire connectorsHanger Bars Bars can be repositioned 90" on plaster frame without tools.Bars fit onto T-bar spine for quick alignment and can be permanently securedScore lines allow bars to be shortened without tools to accommodate a 12" joist span.