Inquiry (采购产品): Wall Heater/Wall Box 4000 I now own a condo that was built in 1974. A previous owner put in a Markel wall heater. Inside the heater it says "Wall Box 4000." How old is this heater? Can I buy a new grill for it or should I just replace it due to it's age? Is there a newer version that is the same size (16 3/4" x 7 1/2" x 1 5/16"...l x w x d)? Any information on this heater would be helpful. Thanks! J. Miller JMMiller312@aol.com **** Hidden Message ***** Mrs. Miller 92019 USA Company: Private party E-mail: jmmiller312@aol.com **** Hidden Message ***** jmmiller312@aol.com
