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If sweltering sidereal day and night without central aviation conditioning threaten your summer comfort , consider putting in a window AC social unit . install windowpane AC building block is well within the capableness of most do - it - yourselfers . Just be sure to plan out the projection detail , select the appropriate brace for the melody conditioner ’s size , and have a handy assistant .

concord to Micah Sherman , practical HVAC expert at dwelling care and upkeep appFrontdoor , the biggest mistake homeowners make when installing a window AC is “ think that it ’s a one - person Book of Job . Window units can be heavier than they look , and having an extra set of hired hand can make the initiation a lot easier and safer . ” These widget are cumbersome , and they are easy to drop if you are n’t prepared . Plus , they need to be positioned right so as to effectively chill the outer space .

Man and woman place a window air conditioning unit in a window from the inside of a home.

Photo: Jeffrey Greenberg/Universal Images Group via Getty Images

To study how to get the job done safely and fleetly , fall out the tips here , and then ascertain out our pathfinder onhow to install a window AC unitwhen you are quick to start the project .

1. Get permission from your HOA or landlord.

While most owners of unmarried - menage homes are free to establish a windowpane AC , if you populate in an apartment , condo complex , or aneighborhood with a homeowners connexion , check with direction or the HOA board before investing in an AC unit . You may be able to look up rule of thumb for window AC units in your development ’s covenants , conditions , and limitation ( CCRs ) , architectural rules , and bylaw . Even if alternating electric current are permit , there may be limitation on the eccentric of window AC that are allowed on certain elevation of the rest home .

When properties and HOAs do n’t allow for window Ac , it ’s typically for esthetic reasons ( they ’re not specially attractive ) or safety gadget concerns . There ’s a peril that an improperly installed unit could fall from the window , leading to injuries .

Tried-and-True Advice

“ When I lived in my New York City apartment , I fear removing and reinstall my windowpane AC unit of measurement every year . rather of take it out entirely in the winter , I used a uncomplicated trick to block draft and keep my apartment ardent .

After securing the unit with an exterior square bracket ( a must in NYC ) , I cut a patch of rigid foam insulation board to jibe snugly around the AC inside the window anatomy . Then , I sealed the bound with removable weather strip tape . This helped prevent freezing drafts without damaging the window , and when summer roll around , I just peeled off the tape and was ready to go . It save me from the bother of reinstall the unit every twelvemonth and kept my heating poster lower in the winter . ”

2. Select the window that can best accommodate an AC unit.

Before look for for the right AC unit , you ask to pick the window that will be easiest for installation and most efficacious for usance . Not every window is suited for every type ofair conditioner , and there are many window AC meet ideas to deal . Most window ACs are designed for usance with received double - hung windows , which have two operable sashes that skid up and down . There are also AC building block made for sliding windows , which move from side to side , and casement window , which tilt outwards to open . These tips apply primarily to installing a windowpane AC in a double- or single - hung window . Here ’s what to consider when selecting the right windowpane :

3. Measure your window and your room.

There are two sets of mensuration you ’ll postulate : the elevation and width of the window opening and the square footage of the elbow room the unit will cool down . The air conditioner ’s packaging will typically specify both the size cooking stove of acceptable windows and themaximum square footage the social unit can cool , so make certain your measurement are within the guidepost for the unit you ’re considering .

4. Figure out how much power you need.

You ’ll need to look at two more numbers , normally point on an air conditioner ’s packaging , to ensure you ’re purchase the good building block for your needs .

If the tune conditioner is n’t powerful enough for the space , it will operate unceasingly without reaching the desired temperature . If it ’s too powerful , the whole will tend to wheel on and off too quickly . This rapid cycling which wo n’t let enough time to reduce room humidness effectively and will lead to odd temperature throughout the place . Generally , a windowpane unit ’s BTU rating will match theAC manufacturer ’s recommended room sizing , but to account it yourself , try an online BTU calculator .

5. Always have someone close by to help, and make sure no one is under the window.

Installing a windowpane ACon your own is an comfortable way to wound yourself or circumstantially shed the unit out the window . Always ensure there are no people or pets below the area where you intend to deploy the whole . Also , protect anything inanimate below that ’s valuable to you by moving or covering it before starting the project .

windowpane air conditioner typically weigh between 50 and 100 pounds , so safely maneuvering the appliance into the window and then hold it in stead while it ’s being secured with screws want a helper . It also requires ripe communication to make certain you both have your hands on the unit when necessary and are working in unison .

“ If you do n’t have the proper dick for the job or have refuge concerns , such as installing the unit in a high window , then you may debate asking a professional person for help , ” says Sherman . “ However , most of the prison term , these systems are simple enough to establish without the help of a pro . ”

An air conditioner unit is installed in the window with a mounting rail underneath it.

Photo: iStock

6. Prepare the window and install brackets, if necessary.

Before instal a window AC building block , afford the windowpane as far as it goes , remove the screen , and clean the windowsill , spyglass , and window underframe . A properly establish melody conditioner may sit down firmly in the window without an exterior living bracket . But very heavy units ( those more than 100 pounds ) do require additional support , and some municipalities , notably New York City , require the habit of an exterior support bracket for all windowpane air conditioner , regardless of weight .

broadly speaking , you ’ll need to buy musical accompaniment brackets for windowpane AC unit separately . There are different configurations of AC brackets , but most resemble either a small ledge or a couplet of “ legs ” that pass outside the window to help guard the unit in situation . “ The character of bracket does matter , ” says Sherman . “ It also count on the type of window . A wall bracket can help deal out the weight of the unit and reduce tension on the window itself and the glass . L brackets are ordinarily used , although most unit fare with their own mount brackets . ”

Some window unit support bracket , such as theIvation Window Air Conditioner Support Bracket , need no drilling or piece of ass , greatly simplifying installation . The Ivation has an expandable legal community that fits firmly in the lower windowpane skeleton while two rubber - tip “ feet ” relaxation against the exterior wall to patronise the melodic phrase conditioner ’s weight . Expect to pay from $ 30 to $ 100 for a support angle bracket . ( you’re able to instead opt to make a DIY window AC bracket . )

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7. Attach mounting rails and side panels.

Some windowpane units come up with top and bottom mounting rails already bind . These assistant take the air travel conditioner securely in the window . If your whole does not , use the included screws to attach the mounting rail , making sure to tighten all screws completely . Here are the general steps for installment .

Is the AC unit installed securely?

After the AC unit of measurement is in the window , it ’s sentence to check that the unit is securely set up .

8. Measure the unit’s tilt.

Many window units require a very slight tilt away from the construction to prevent abridgement from puddling down the wall inside your household . Typically , the disputation should n’t be more than half an inch , which can be achieved by slide a shim or two underneath the root word of the AC , but check the installation guide for the manufacturer ’s recommendation . Some newer units do n’t expect a leaning , as the manufacturer has installed the drip pan at a slight angle .

Now that your windowpane AC social unit is installed , it ’s time to essay it out . Plug it in , turn it on , and enjoy the coolheaded ministration from summer ’s heat .

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A window air conditioner unit is supported by brackets underneath it.

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