Celebrating the Anniversary of a Discovery That's Completely Changed the Built Environment

Following on the hottest ever first half of a year in America's recorded history, James Barron examines the history behind the creation of air conditioning, on this day in 1902.

1 minute read

July 17, 2012, 2:00 PM PDT

By Jonathan Nettler @nettsj


The birth of air conditioning can be traced to July 17, 1902, when a junior engineer named Willis Carrier drew the "blueprints for newfangled equipment to temper the air...a solution so simple that it had eluded everyone from Leonardo da Vinci
to the naval engineers ordered to cool the White House when President
James A. Garfield was dying: controlling humidity."

Barron describes the dilemma that Carrier, "a junior engineer from a furnace company," was trying to solve when he devised a system involving "fans, ducts, heaters and perforated pipes" for the the second floor of a Brooklyn printing plant. 

Needless to say, "It was a world-changing innovation," notes Barron.

"'Air-conditioning, in the broad
sense, had a profound effect on the way people lived and worked,' said
Bernard A. Nagengast, an engineering consultant who specializes in the
history of air-conditioning and heating. 'It allowed industry to operate
in ways it couldn't operate before, in places it couldn't operate
before.'"

"It all but redefined Florida and Houston and the rest of
the Sun Belt. 'And Singapore, sometimes called the air-conditioned
nation,' said Eric B. Schultz, a former Carrier Corporation executive
and author of a recently published company history."

"And, Mr.
Schultz said, the Internet, because air-conditioning minimized dust,
making possible the so-called clean rooms for computer manufacturers and
electronics companies."

 

Monday, July 16, 2012 in The New York Times

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

1 hour ago - Zachary Whalen

Passengers board an Amtrak train under a cloudy sky.

Amtrak, CN end decades-long dispute with eight-year agreement

The new operating agreement establishes an updated framework for the companies to work together, including processes to resolve disputes.

September 18, 2026 - Mass Transit

The Gross Reservoir, a large body of water surrounded by trees and mountains.

Judges permit Denver to divert 77,000 acre feet from the Colorado River for reservoir expansion

Overuse and climate change have caused the Colorado River’s water levels to plummet.

September 18, 2026 - Inside Climate News

Visitors view the Obama Presidential Branch of the Chicago Public Library on the campus of the Obama Presidential Center

South Chicago development proposal would 'upzone' neighborhoods to increase density

The South Chicago Land Use Framework plan also aims to promote pedestrian and transit-oriented developments.

30 minutes ago - Block Club Chicago

A crowd of people boarding Boston's green line in an underground subway station.

Boston has spent millions making the Green Line more accessible — and there’s no end in sight

While the city has invested millions into expanding and adding platforms to the Green Line to make it more accessible, new train cars set to arrive next year will be too tall for disabled passengers to board without raising the current platforms.

September 22 - Boston Globe

Railroad tracks in Idaho passing a home by a river.

Idaho may see an 18% drop in federal surface transit funding — the largest estimated cut in the US

Transit systems in rural communities are much more reliant on federal funding to provide their services.

September 22 - Grist