It happens the same way every year.

The first real heatwave hits New York in late May or June. The temperature spikes to 92 degrees. Everyone who didn't buy an air conditioner suddenly needs one today. The decent units vanish from hardware store shelves by noon. Amazon delivery estimates push out to two weeks. The bottom-of-the-barrel units — the ones that sound like a diesel engine and cool about three square feet — are the only things left.

And then people spend way too much money to get something worse than what they would have paid for six weeks earlier.

You are currently in the buying window. Use it.

Buying an air conditioner in New York City is not like buying one anywhere else.

Your electricity situation is complicated. New York City has some of the highest electricity rates in the country. Con Edison residential customers pay, on average, around 24–27 cents per kilowatt-hour — roughly double the national average. That means an inefficient AC unit doesn't just cool poorly; it costs you real money every time it runs. Energy efficiency (measured in BTUs per watt-hour, now rated by the Department of Energy's CEER score) matters more here than anywhere else.

Your building has rules. Most NYC apartment buildings — especially older co-ops and rental buildings — have window unit restrictions. Some buildings require units under a certain weight. Others require sleeve sleeves for through-the-wall installation. Many co-op boards have approved unit lists, and some buildings ban window units outright in certain apartments. Check your building's house rules before you buy anything.

Your outlet situation matters. Most NYC apartments have standard 110/120V outlets, which limits you to window units under about 15,000 BTUs. Anything larger requires a dedicated 220V circuit — and installing one in a NYC apartment involves your landlord, a licensed electrician, and possibly a permit. If you want to cool a large space and don't have 220V already, your options are limited unless you use multiple smaller units or a portable unit.

Your windows may not cooperate. NYC apartments have casement windows, double-hung windows, windows that open sideways, and windows with security bars. Not every window AC fits every window. Measure yours before you buy.

The rule of thumb — 20 BTUs per square foot — gets you in the ballpark, but NYC adds wrinkles.

Start with square footage. Measure the room you want to cool. A 300 sq ft living room needs roughly 6,000 BTUs. A 500 sq ft open plan needs 10,000. A 700 sq ft combined living/kitchen needs 14,000.

Adjust for NYC-specific factors:

The result is your target BTU range. Don't significantly over-buy — an oversized unit cools too fast without dehumidifying properly, leaving the room cold but damp and clammy. NYC summers are humid. Dehumidification matters as much as cooling.

Window units: More efficient, quieter, better at dehumidifying. The right choice for most NYC apartments with accessible windows. Requires installation (usually manageable with basic tools) and seasonal removal.

Portable units: Higher flexibility, no installation required, can be moved room to room. The tradeoff is significant: portables typically have an efficiency penalty of 20–30% compared to window units at the same BTU rating, and they exhaust hot air through a duct that needs to be routed through a window anyway. They're also larger and louder.

For most NYC residents: window unit is the better buy if your windows allow it.

The main case for portable: casement windows that won't fit a standard AC, high-rises where windows can't be opened, or buildings that prohibit window installations.

CEER (Combined Energy Efficiency Ratio): The current federal efficiency rating for room ACs. Look for a CEER of 12 or higher. Some NYC buildings now require ENERGY STAR certified units. Anything below CEER 10 is costing you more on your Con Ed bill than it should.

Smart home integration: Many modern units connect to Wi-Fi and work with Google Home, Alexa, or an app. If you're not going to be home all day, remote control lets you cool down the apartment before you arrive rather than running it all day.

Washable filters: Non-negotiable for NYC. The air quality here means filters get dirty fast. Washable filters save you money and maintenance headaches.

BTU range: Spend time here. Buying too large is almost as bad as buying too small.

Noise rating (dBA): If you're in a bedroom, look for units rated below 50 dBA. Some units advertise near-silent operation; take that marketing with a grain of salt and check owner reviews.

In-store: Home Depot, Lowe's, and PC Richard & Son carry seasonal inventory. Stock is usually good now (April) but thins fast after Memorial Day. Buying in-store lets you confirm dimensions and check return policies.

Online delivery: HVAC specialty retailers often have better selection, better prices, and more detailed specs than big box stores. For window and portable ACs, Sylvane consistently carries a range of models across BTU sizes, efficiency ratings, and brands — including units with detailed spec pages that make comparison easier than big-box listings. Their return and shipping policies are worth comparing if you're buying a larger unit. Browse AC units at Sylvane →

Before you install anything:

Starting June 1, Con Edison typically shifts to summer rates with higher peak demand charges. Running a large, inefficient AC during peak hours (roughly 8 AM–10 PM) costs more than running an efficient unit off-peak.

The practical playbook: set your smart AC to pre-cool the apartment between 6 AM and 8 AM before peak pricing kicks in. Use the timer or app to throttle down during peak hours if you're not home. A unit with a good efficiency rating will pay for part of its own cost in electricity savings over a single NYC summer.

Buy the right unit now, install it before the rush, and you won't be scrambling in a 90-degree apartment while you wait for a backorder to clear.

That's the move.

The Metro Intel covers NYC homeowner and renter life across all five boroughs. Forward this to someone still running a box fan.