A:Answer Hi there - this is a great question! We're sorry to hear that your previous microwave died after 21 years, but we are glad you're reaching out to inquire about a new one! This model, #PEB7227DLBB, is comparable to your other microwave in overall height and overall width, as well as microwave watts (it is a bit larger in overall depth, at 19.75" compared to 17.8"). It's also important to know what size trim kit you have, though. The two size options are 27" and 30" and those trim kit model numbers for the new microwave are JX7227DLBB and JX7230DLBB, respectively. We hope this helps! Don't hesitate to contact us if you have any questions or concerns. Best, Kelsey@GEA