CSA Matter Certified
Certificate: CSA2592BMAT47229-24Lennox International, Inc.Climate
Lennox S40 Smart Thermostat
CSA CertifiedDirect retailer link
$699.030
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Lennox S40 Smart Thermostat by Lennox. This CSA Matter certified smart home device brings seamless integration, enhanced security, and reliable performance to your ecosystem. Perfect for building a connected home.
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Buy on Amazon$699.03
Last checked: Mar 16, 2026
Last checked: Mar 16, 2026Price confidence: stale (30+ days)
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Specifications
Ecosystem Compatibility
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Best Matter Smart Thermostats 2026
Smart thermostats with Matter — save energy with universal compatibility.
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Lennox S40 Smart Thermostat
CSA certified• $699.03