Something that is (and I'm assuming that you're posting about a ham
radio application) an important question regarding EMI is what kind of
antenna are you using, how far is it away from your appartment EMI
sources, and what sort of shielded feed are you using to connect your
equipment with the antenna?

From your post, it sounds like most of your EMI sources are in your
appartment. You want to have your antenna(s) as far away from these
noise sources as possible, as well as shielding the feed from the
antenna to your equipment as much as is possible. Generally speaking,
coax like RG-8U makes a good antenna feed, but in extreme EMI cases a
coax with double shields is a good investment.

Since most of us have the same EMI producing devices in our homes as do
you, I'm not sure why you're having any more of a problem than the rest
of us, unless of course you haven't yet installed a good, outside
antenna system with a properly engineered feedline. If this is the
case, no amount of appliance and power line noise suppression will
achieve the results you are looking for.

Harry C.