New unit, had to use inside vent, filter not included

I went to your site and looked up the schematic parts list and determined how to remove the grill and install the filter. I had the grill off and when the filter arrived I put it in, replaced grill and screws and then in about 20 min had the microwave installed on the wall and operating. By the way the part arrived about three days earlier than estimated. Thanks for your prompt response. You are on my favorites list for future appliance parts.