Honeywell T87

File:Honeywell round thermostat.jpg

The Honeywell T87 Round Thermostat is a thermostat that Honeywell International, Inc. first manufactured in 1953.{{cite book|last=Åström|first=Karl|author2=Richard M. Murray|title=Feedback Systems: An Introduction for Scientists and Engineers|url=https://archive.org/details/ost-engineering-feedback08|publisher=Princeton University Press|year=2008|page=[https://archive.org/details/ost-engineering-feedback08/page/n327 6]|isbn=978-0-691-13576-2}} Henry Dreyfuss designed the thermostat based on a concept by Honeywell engineer Carl Kronmiller.{{cite magazine

|magazine=Popular Science

|title=Corrections

|volume=244 |number=4 |page=8

|url=https://books.google.com/books?id=QriV7IuTZygC&pg=PA8

|date=April 1994

|issn=0161-7370}}