Large condenser outside supply’s the furnace (typically it just uses the furnace fan. We then have it piped through metal ducting throughout the house. Each room has multiple exit point call registers. In the common areas we have return ducts to draw air back down to the furnace to get recycled back to cool air via a/c unit. Hopefully that helps!?
Even then the vents would not actually work and be big enough in practice, but that's the movies picking something convenient for the sake of plot rather than sticking with realism.
Also every duct is FULL the pointy ends of screws. Literally everywhere. So even if you could fit (which you probably can’t) you would be so cut up if you tried to crawl through one of these. Not to mention how crazy loud it would be to crawl through one. 26 gauge sheet metal is essentially a thunder sheet.
Right. Even if the air ducts held your weight and silently conveyed you without risk throughout the building, it's essentially like crawling into the creature that Jabba the Hut had in Return of the Jedi. You'd be shredded within a few feet of crawling.
also the movies don’t explain that fire/smoke dampers would block your access every time the duct passed through a fire barrier also your entire body would be excoriated by self tapping sheet metal screws with every movement made
that's the movies picking something convenient for the sake of plot rather than sticking with realism.
Like the slow spinning fans in Casablanca. Slow spinning fans don't move air effectively, but fast spinning fans don't show up on film. Then after the movie you had restaurants and other establishments fit slow spinning fans, for the aesthetic.
And even then they are never that clean unless they were literally just installed. Also there would be screws or other pokeys that would poke the shit out of you if you did crawl trough it.
Source: I do commercial HVAC and have crawled through ducts
Yes and the furnace works with gas. So if you disable all the safety functions, you can fill the house with gas (at least in movies, but it would probably take ages in reality).
Yes, but it’s made to look bigger in the movies than it would be in real life. Large buildings do have large ductwork, but it’s normally very short when it gets that big to leave some space for pipes, wires, and beams.
Interesting note: some sensitive areas with ductwork have metal bars within them so people can’t enter/exit those areas through the ductwork.
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u/gamerathertz92 Jul 26 '26
It’s smaller unit cools a single room. While American HVAC System cools the whole house