We have hoses for Nutone and all systems, no matter their age. The first thing to determine is if you want to upgrade, you don't need to change anything in your home for it. If you have carpet we highly recommend a new Electric Kit such as Stealth, Ace, or BlackHawk. The hose has an 8ft pigtail electric extension cord that comes off the wall end of the hose and plugs into a nearby electrical outlet (extension cords can be used if needed as well). This hose will plug into your existing inlet valves and if the fit is too snug it takes one minute to fix. So when you are vacuuming there is still only a hose to move around, not a hose and an electric cord because the wires are hidden in the ribs of the lightweight hose. Here are the Electirc Kits that fit your system http://builtinvacuum.com/comparison.html
. If you truly only need a hose at this time you first need to decide if you need an electric or non-electric hose. You need electric if the carpet brush nozzle used in your home has an electric cord coming out the back of it. If there are no cords involved with your system then buy the Low Voltage Hose, not the Basic Hose. It will fit into the older Nutone inlets and if it is snug can be easily modified in one minute by removing a bit of plastic from the friction ridge on the hose end. Here are Low Voltage Hoses http://builtinvacuum.com/hoses/lowvoltagehoses.html
. If you have any questions please let us know.