Air Conditioners and Window Boxes: What You Need to Know Before Doing an Installation Before You Stay Cool This Summer, Know the Rules

Check with your board before putting in an air conditioner in your unit (iStock).

It's still February, but with temperatures expected to reach a balmy 60 degrees this weekend in New York City, it's only a matter of time when spring is arrives. And along with the hint of spring come thoughts of summer, which means air conditioning. For many New Yorkers, that’s through the window air conditioning (A/C) units.

Rules and Regulations

Like pretty much anything in New York City, your air conditioner is governed by rules and regulations. While not specifically mentioned in the law, A/C units fall under the purview of Local Law 11, enacted in 1998. They’re covered under administrative code C26-105.3, which deals with exterior walls and appurtenances thereof. The code requires inspection, notification of unsafe conditions, submission of a report of examination by an architect or engineer in the event of unsafe conditions, and the completion of necessary repairs (There are additional sections dealing with exceptions and violations--to view the code, click here).

From a practical standpoint, that means all residents who install window unit air conditioners must follow a certain set of suggested guidelines available from the city, which you can read here. In short, the city recommends (which really means requires, as most co-op and condo boards and landlords would like to avoid violations under the administrative code mentioned above) that all units are secured with “supporting metal brackets” that “should be structurally fastened to the building and must be strong enough for the size and weight of the A/C unit.”

The New York City Buildings guidelines also make it abundantly clear that one “should not use loose objects—such as wood blocking, bricks, telephone books, gypsum boards or cans—to support the leveling of the A/C unit.” The recommendations also specifically state that nothing should be place on top of the A/C unit such as TV antennae, satellite dishes or plants, and that they unit should not block fire escapes or other exits.

Up or Down?

Of course, the downside to window unit air conditioners is that they virtually always block one of the essential amenities most sought after in a New York City apartment: light. One option is to install the air conditioner at the top of the window rather than at the bottom on the sill. While that will afford more access to light in many cases (many people have some kind of blind or shade over the upper window anyway) the installation is more complicated. Lower window installation requires a simple T-bracket that attaches with three screws. Upper window installation requires brackets along the sides and under the unit straddling the window.


Related Articles

What to Do With Your Air Conditioner After the Summer

Try Taking Them to Storage

Rockefeller Group to Make Manhattan Residential Debut

Developer Behind Rockefeller Center Launches Sales for New Condo Property

Corte: A Little Bit of Buenos Aires in Long Island City

New Condo Development Takes Shape in Queens



  • I have a very large 15,000 BTU air conditioner that I had installed in a sleeve properly,it is not really portable.The landlord wants me to remove it for the Winter months.I have no place to store it and would require cost in its removal and installment for warm temperatures.I am 72 years old and a veteran do I have to go through this ordeal each Winter even if it is covered on both sides.I feel that this is the landlord's attempt at harassment since he wants me out for a new tenant with higher rental fees,Thank You Your response as soon as possible requested Yonkers New York