Be smart, stay dumb.

Back to the sheet Home & Living Thermostat · E4
Honeywell The Round
E4 · Level 2 · A quiet chip Dependable doofus

Honeywell The Round

Honeywell Home CT87K The Round heat-only thermostat.

$33Buy on Amazon
Amazon US, October 2026. Prices change.

The round dial Henry Dreyfuss designed in 1953 is in MoMA and still on sale. Today it has electronics behind the dial, and nothing that talks to the outside world.

Where to buy

Some links earn us a small commission. It never changes the order.

Survival checklist

What it survives, next to the smart one it replaces.
1
=SURVIVES(threat)Survives…
ThisHoneywell The Round
What it replacesSmart oneGoogle Nest Learning Thermostat (4th gen)
2
Power cut
FALSE
FALSE
3
Wi-Fi goes down
TRUE
#DEPENDS
4
The company switches off its servers
TRUE
#DEPENDS
5
Someone tries to hack it
TRUE
FALSE
6
A firmware update goes wrong
TRUE
FALSE
7
Twenty years from now
#DEPENDS
#DEPENDS
8
=COUNTIF(TRUE)Total
4 of 64/6and one maybe
0 of 60/6and three maybes

The smart one is the Google Nest Learning Thermostat (4th gen).

Row 4

See it in the sheetIn the sheet
You are here

Henry Dreyfuss drew it in 1953. Now with a quiet chip inside.

Honeywell The Round

$33
Honeywell The Round$33
Buy on Amazon