In this video, This Old House plumbing and heating contractor Richard Trethewey explains how to get air conditioning where window units aren't practical. If there's no existing wall vent, use a jigsaw to cut a 4-inch-diameter hole through an exterior wall. Apply silicone caulk to rear flange on wall vent. From outside, slide wall vent through hole in wall; secure with stainless steel screws. Twist and lock the flexible duct to the exhaust port on rear of air conditioner unit. Connect the duct end to the wall vent and seal with foil duct tape. Plug air conditioner unit into an electrical outlet. Turn on unit, then set thermostat and, if desired, the automatic timer. Latest news: • AMA with Travis Larson is over • now has a Discord channel! • Did you miss the AMA with Patrick DiJusto?? • The subreddit got a facelift! Tips: • These are not the subreddit rules. Please see the guidelines link above. • If you are posting a help request, please include as many details as possible. Marvin Windows and Doors Immersion. Installing a portable air conditioner. How to Install a Portable Air Conditioner. Shopping List. Portable air. These will not work for air conditioners for crank out windows. If you have crank out windows, you need to buy a window air conditioner specifically for crank or casement windows. Our favorite is the Frigidaire FRA123KT1 12,000 BTU Casement/Slider Room Air Conditioner. Please consider adding photos and doing some basic research into your question. Should not be your first stop for your question. • All help request must go in 'self posts' or the stickied thread at the top of the subreddit. • If you are sharing your finished DIY project, please explain how it was done. Consider putting the finished photo first, however this is not a requirement. Comments regarding finished photo location will be removed. Projects without adequate detail will be removed. • Please keep all comments on topic. Moderators will remove off-topic comments at their discretion. • All images must be hosted on imgur. Non-imgur links will be considered on a case by case basis. Please message the moderators with a link to your post for approval. • All video submissions are considered on a case by case basis. Please message the moderators with a link to your post for approval. • Civility is a requirement for participating on. We try to stick to a '3-strike' policy for rule infractions - however moderators reserve the right to bypass this policy any time. A temporary ban constitutes a 'strike'. Important note: Finished DIY project submissions without adequate details / photos will be removed. Consider submitting these photos to instead. Is about the process rather than the result. A good rule of thumb is somebody who sees your post should be able to relatively get close to being able to replicate the project with the information you've provided Filter by Flair bla AMAs AMA Date Mar 27, 2017 Feb 23, 2017 Jan 5, 2017 Sep 8, 2014 May 29, 2014 Aug 10, 2014 Other reddits you may like: • • • • • • • • • • • • • • • • • • • • • • • • Our AMA with Travis Larson has ended, but to catch up on what you missed! I do this at home with regular ACs. I hang a big 22,000btu AC out of a second story window, and a smaller one, 8500btu in the same manner. Here is what I've learned. • I use pressure treated 2x4 wood for the support, mitered on 45 degree angles. I use deck screws to secure it to my cedar sided house. Make sure it sits low enough from the window base to allow the AC to drain. Your unit should sit a few degrees from level. • Remove the the casement window completely. I buy a custom piece of high quality acrylic from Lowes. They can cut on the spot. Spend the money and get 1/4 inch thick. Make sure you find an operator that knows how to cut properly. You're going to re-use this piece of acrylic every year, so get a nice piece. • Use color matched 1x.5 thick weather stripping. Try and use some of the window molding as a guide/base. • Have the glass cut.25 inches smaller on each dimension so its easy to install. • Secure the glass from the inside with washers that screw in to the molding and overlap on to the glass. • I use 'cold weather' duct tape to further weather proof the setup from the outside of the house. The duct tape is the only thing I don't reuse year to year. It has the condenser coil (hot) inside the space, jammed into a box with the evap coil and then (90% of them) uses your nice preconditioned air from the room to cool the condenser coil and then exhausts it outside. This creates a vacuum in the space that forces air from either outside or some other, probably warmer, part of the house into the room. Or if the room is sealed well enough it will just starve itself for air and force itself off. Not to mention they all end up leaking condensate.
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