MN90: Honeywell's Hot Little Thermostat

The Honeywell round thermostat design is one of the most user-friendly and underappreciated appliance designs of all time. MN90 Producer Andi McDaniel explains what has made the “T86 Round” so popular and so enduring.

MN90: Honeywell's Hot Little Thermostat

The Honeywell round thermostat design is one of the most user-friendly and underappreciated appliance designs of all time. MN90 Producer Andi McDaniel explains what has made the “T86 Round” so popular and so enduring.

Black and white image of Honeywell Round thermostat.

Honeywell Round thermostat

The Honeywell Round, 2007. Photograph by Wikimedia Commons user Flickr user midnightcomm.

Color image of Honeywell Chronotherm counter sign.

Honeywell Chronotherm counter sign

Metal stand-up counter sign advertising the Minneapolis-Honeywell Regulator Company's Chronotherm Automatic Thermostat. Created by Donaldson Art Sign between 1930 and 1945.

Black and white photograph of Honeywell Round thermostats ready for final checkout and packaging at a factory in Golden Valley, c.1955.

Honeywell Round thermostats ready for final checkout and packaging

Honeywell Round thermostats ready for final checkout and packaging at a factory in Golden Valley, c.1955.

The Honeywell Round Thermostat

The world's most iconic home thermostat was created in Minneapolis. The Round, designed by engineer Carl Kronmiller and designer Henry Dreyfuss, was introduced in 1953 by the company then known as Minneapolis-Honeywell. The Round became both a sales mainstay and a world-renowned piece of industrial art.

Photograph of the Pietenpol Field Hangar, moved to EAA Airventure Museum Pioneer Field in 1984.

Pietenpol Field Hangar

Pietenpol Field Hangar, moved to EAA Airventure Museum Pioneer Field in 1984. Photograph by Wikimedia Commons user FlugKerl2.

Color photograph of Pietenpol Air Camper G-OHAL, Continental C90-14F powered, built 2008, flying at Old Warden on September 7, 2008.

Pietenpol Air Camper

Pietenpol Air Camper G-OHAL, Continental C90-14F powered, built 2008, flying at Old Warden on September 7, 2008. Photograph taken by Wikimedia Commons user TSRL.

Color photograph of home-built Pietenpol Air Camper (UK registration G-BUCO) at Kemble Airfield, Gloucestershire, England.

Pietenpol Air Camper

Home-built Pietenpol Air Camper (UK registration G-BUCO) at Kemble Airfield, Gloucestershire, England. Photograph taken by Wikimedia Commons user Arpingstone.

Pietenpol Airplanes

When Bernard Pietenpol started to build airplanes in his Cherry Grove workshop, he'd never actually piloted one. He only learned to fly once he had built his first plane. Nevertheless, Pietenpol's popular designs for lightweight, easy-to-construct airplanes made him the "father of the homebuilt aircraft movement."

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