Window units or central air in Buffalo

The nights are the change

At Buffalo Niagara International Airport, nights that never dropped below 70°F went from 9.4 a year to 14.5 (NOAA, 1991-2020 compared with 2016-2025). On a night like that a second-floor bedroom in a brick or clapboard house built before the war holds onto the afternoon, and a box fan in the window just stirs it.

Nights per year when the low stayed at 70°F or above

Window and portable units, honestly

• Low price, and a dead one is easy to replace.
• Loud, they take over a window, and they have to come out or get wrapped before the snow.
• Single-hose portables blow indoor air outside and pull hot outdoor air back in through every gap, so they cool less than a window unit with the same BTU label.
• Nobody repairs them. When one quits, a new one usually costs less than the fix.

Central air

A house with a gas furnace and ducts is most of the way there: add a coil on the furnace and a condenser outside. Fixr's installed range nationally is $5,800 to $14,400. It runs quietly and takes the humidity out of every room at once. Installation details.

Ductless

In a radiator house, wall-mounted ductless heads split the difference: much quieter and more efficient than window units, no ductwork, and most models heat as well. Fixr lists $4,577 to $8,328. Ductless mini splits.

Signs it is time to move up

• You run three or more window units and buy a replacement nearly every year.
• An older adult, or someone whose health condition gets worse in heat, lives with you.
• The upstairs bedrooms are still warm at 2 a.m.
• The furnace is near the end anyway, which makes adding a coil or going to a heat pump a smaller step.

Renting an upper flat? New York's home improvement statute excludes a room air conditioner built to be taken out without altering the building, so putting one in is not a home improvement contract under General Business Law 770. Anything permanent needs your landlord's okay first.