said by pclover:Will Comcast allow A Business & Residential account at same address?
In my area, I know for a fact that you can have Comcast Business Class Internet service and Xfinity residential TV service at the same address (because I have both services). I also am continually bombarded with email and USPS mail offers to signup for Xfinity residential HSI service; so I suspect that if I were to accept one of those offers, the service would be activated with no questions asked (since Xfinity does not seem to know that I already have Comcast Business Class HSI).
The primary problem might be if your signal levels would allow a second modem due to the drop in signal levels in a splitter. I know in my case, that a second modem would be very marginal due to the current signal levels. Cablejim1087's suggestion of asking for a separate drop for the second service would probably be a good idea if Comcast allows it in your area. I asked for a separate drop for my Business Class HSI service, but I was told that was not allowed in my area for the same address.