To cater to different situations, having a vacuum kit such as this will be very helpful. It is designed to fit the vacuums of any major brand, including Honeywell, Electrolux, Eureka, Hoover and AirVac. When you need to clean hard to reach places in and around your RV, this vacuum kit will be a godsend.
Some people put the unit in a bay and install things so the just the hose connection is in a convenient place inside the RV. We didn’t bother going to any trouble and instead just keep the unit in a cabinet, with the hose and attachment in a nearby storage drawer.
It makes a lot of noise, but it works well. We had tried other small vacs before and as you say, nothing that is small enough for a motorhome has enough suction. We have had the central vac for several years now and are very pleased with it.
I purchased a Shop Vac wall mount unit, which has a narrow cylinder body. The unit can mount in a closet, is detachable, and has a 20′ hose, which from the center of my rig can almost reach both ends.
Upon arriving in Florida on my first winter full timing the toilet developed a crack and water started to leak toward the carpeted areas. The Shop Vac was able to suck up the water before any damage was done. I also use it for the carpets in my car, as well as the storage bays under the motorhome. I was just under $50. Good luck and safe travels.