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Lennox L40 Smart Thermostat
CSA Certified
The Lennox L40 Smart Thermostat is Matter certified (certificate CSA25B3CMAT47758-24, certified Oct 14, 2025). A certified Matter device can be added to any Matter controller whose app supports its device type, such as Apple Home, Google Home, Alexa, SmartThings or Home Assistant; features vary by app. The maker hasn’t named platforms on a page we hold. We have no verified store link for it yet.
Certificate data: CSA ledger read . Set-up steps and sources: Apple Home · Google Home · Alexa · SmartThings · Home Assistant
CSA Matter certified (certificate CSA25B3CMAT47758-24).
At a glance: Matter certified: Yes, Oct 14, 2025 · Connectivity: Wi-Fi
- Works with
- Matter certified as a thermostat, so it can work with Matter apps such as Apple Home, Google Home, Alexa and SmartThings when the app supports its device type; supported features vary by app. The maker hasn’t named platforms on a page we hold.
- CSA certificate
- CSA25B3CMAT47758-24, certified Oct 14, 2025
Updated : the last change to this page’s certification, platform or store facts.
Not sold by a US store we can verify. Similar CSA-certified smart thermostats you can buy:
Independent guide. We may earn a commission through affiliate links. Direct non-affiliate links are labeled. How our links work
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Why these: we have no US store link we can verify for this exact model. Each is a different product, certified by the CSA as the same device type, thermostat, with a CSA certificate for its own model and a store link we checked. Models on the same network (Wi-Fi) come first; the order is not a ranking.
No US store link yet
We link to a store only after its listing matches this exact model, region and package.
Shop thermostats you can buy now →CSA Matter Certified
Certificate: CSA25B3CMAT47758-24Matter 1.3 certificate
Its certificate, CSA25B3CMAT47758-24, is for Matter 1.3, certified Oct 14, 2025. The Matter version is the specification version on the certificate's ledger record.
Source: CSA Distributed Compliance Ledger, read Nov 10, 2026.
What Matter 1.3 added, and which devices use it →Certified software versions
The CSA ledger lists 2 certified software versions for the device on certificate CSA25B3CMAT47758-24. The most recent is software 04.38.0087, certified Oct 14, 2025, for Matter 1.3. That is the certificate this page shows.
- Software 04.38.0087 · certified Oct 14, 2025 · Matter 1.3 · CSA25B3CMAT47758-24 · this page's certificate
- Software 04.38.0081 · certified Sep 24, 2025 · Matter 1.3 · CSA2592AMAT47228-24
Certification covers each software version listed. It does not establish the software on a unit you buy.
Source: CSA Distributed Compliance Ledger, device record (vendor ID 4950, product ID 2), read Nov 10, 2026.
Lennox L40 Smart Thermostat is a smart thermostat. It is listed as connecting over Wi-Fi. It is CSA Matter certified (October 14, 2025), so it can work with Matter apps such as Apple Home, Google Home, Alexa and SmartThings when the app supports its device type; supported features vary by app.
Wi-Fi
Specifications
- Brand
- Lennox
- Category
- Thermostats
- Protocols
- Wi-Fi
- Certificate ID
- CSA25B3CMAT47758-24
- Certificate holder
- Lennox International, Inc.
- Certified
- Oct 14, 2025
- Firmware
- 04.38.0087
Ecosystem compatibility
Matter
Quick answers
- Is the Lennox L40 Smart Thermostat Matter certified?
- Yes. MatterCatalog matches it to CSA Matter certificate CSA25B3CMAT47758-24, certified Oct 14, 2025.
- Does the Lennox L40 Smart Thermostat work with Apple Home or HomeKit?
- Likely. It is Matter certified (certificate CSA25B3CMAT47758-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Apple Home on a page we hold. Apple says an iPhone using iOS 18 or later can add Matter accessories to the Home app without a home hub. Apple’s Matter page lists thermostats among the accessory types the Home app supports.
- Does the Lennox L40 Smart Thermostat work with Google Home?
- Likely. It is Matter certified (certificate CSA25B3CMAT47758-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Google Home on a page we hold. Google says you need a Matter-enabled hub device set up on your home wireless network before you can add Matter devices to Google Home. Google’s supported-device-types page lists the Thermostat type.
- Does the Lennox L40 Smart Thermostat work with Alexa?
- Likely. It is Matter certified (certificate CSA25B3CMAT47758-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Alexa on a page we hold. Alexa needs a Matter-compatible Echo; Amazon says its Echo devices support “a subset of Matter 1.5 and lower device types”, so check that yours does.
- Does the Lennox L40 Smart Thermostat work with Samsung SmartThings?
- Likely. It is Matter certified (certificate CSA25B3CMAT47758-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named SmartThings on a page we hold. SmartThings adds Matter devices through the SmartThings app and a Matter controller.
- Does the Lennox L40 Smart Thermostat work with Home Assistant?
- Likely. It is Matter certified (certificate CSA25B3CMAT47758-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Home Assistant on a page we hold. Home Assistant says: “Adding a new Matter device only works in the Home Assistant Companion app.”
- Does the Lennox L40 Smart Thermostat need a hub or a Thread border router?
- It depends on the network it uses, which this record does not state without ambiguity. A Thread device needs a Thread border router; a Wi-Fi device does not. Either needs your platform’s Matter controller.
- When was the Lennox L40 Smart Thermostat Matter certified?
- The CSA certified it on Oct 14, 2025 (certificate CSA25B3CMAT47758-24). That is its certification date, not a retail release date, which MatterCatalog does not state.
From this product’s catalog record, not hands-on testing. Editorial policy
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