Observed arrival · 2026-10-26

Monsoon: a smart-thermostat adapter for swamp coolers

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Editorial interest 75/100 Selection signal · not a rating of the site

Monsoon is an adapter intended to let standard 24V smart thermostats control a swamp cooler’s pump and fan speeds.

Landing page captured for the 2026-10-26 issue.

For: Southwest homeowners with evaporative coolers
Worth noticing: The compatibility checklist calls for standard 24V wiring, a cooling terminal, and constant C-wire power, which Monsoon says it supplies.

Field notes

The installation sequence runs from a box at the cooler to the existing thermostat wire and then to a standard 24V thermostat. The compatibility checklist calls for a cooling terminal and a fan terminal for fan-only mode; the site says the box supplies constant C-wire power. It offers do-it-yourself installation or installation by a licensed professional, and lists spring 2027 as the planned shipping window.

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