Old English floterian to flutter, fly, flicker, float to and fro, be tossed by waves, frequentative of flotian to float (see float (v.)). Related: Fluttered; fluttering. As a noun from 1640s; meaning state of excitement is 1740s.
Simply closing your floor vents may not be enough to block the air. When you use a forced-air heating system in your home, you're bound to have heat registers too. Sections of duct work, like hallways in a school, run through your home's framing, carrying heated or cooled air to various rooms.etal Registers. Assuming the cover is temporary, and you'll wish to use the register again at some future date, simply get a magnetic vent cover to block a metal heat register in the floor. You can find these at hardware and other assorted stores.
The radiator may have an air bleed or plug on top of the tank or the side, and if it does, open or remove it. Next, open the drain cock. Collect the coolant in a pan. Next, disconnect the lower radiator hose from the radiator and let coolant drain from the block. Third, disconnect the hoses from the heater core, attach auxiliary hoses to the core necks and force a garden hose nozzle into one hose. Run plain water through that hose until clear water comes out the other.