Lennox E40 Smart Thermostat: Matter, CSA, and Platform Facts

Lennox E40 Smart Thermostat: Matter and CSA facts

The Lennox E40 Smart Thermostat is a touchscreen, Wi-Fi thermostat with CSA Matter certification CSA2606RMAT49651-24, certified 2026-01-28. No E40 price is listed in any provided source; see the price section below. LennoxPros lists catalog number 30L26 and model/part number E40, and names Matter, Amazon Alexa, Google Assistant, Control4, and Building36 as smart-home integrations; the CSA DCL record and Matter Alpha list part number 108878. The E40 is Matter-certified (CSA2606RMAT49651-24), which means it is built to pair with Matter controllers; the type matrix below shows what MatterCheck has verified at the thermostat level, but no E40-specific pairing test is on file yet.

The SKU record lists transport as Wi-Fi and thread_role as empty, so this model is not recorded as a Thread device. No Thread border-router need is stated for this Wi-Fi record. The CSA DCL model page names the product "Lennox E40 Smart Thermostat" with vendor ID 4950, product ID 773, part number 108878, and deviceTypeId 769. MatterCheck's SKU record maps deviceTypeId 769 to thermostat. For Wi-Fi versus Thread transport, see MatterCheck's Matter Thread vs Wi-Fi guide and its Matter hub and Thread border router guide.

The provided DCL record does not include a Matter spec-version integer, so no decoded Matter spec version is printed here. CSA certification CSA2606RMAT49651-24 is from the SKU record, with a certified date of 2026-01-28.

What the E40 shares with the S40/L40

Matter Alpha (2025-12-12) reports the L40 and S40 gained Matter via firmware 4.38 or higher with on-device pairing codes; the E40's CSA record shows firmware 04.38.0087, suggesting the same Matter enablement path. On the L40 and S40, users tap Matter Settings, then Make Discoverable, then Show Code, and scan the QR code with their preferred ecosystem. The E40's firmware version aligns with that threshold, though Lennox has not published E40-specific Matter enablement steps in the provided sources.

Lennox E40 type-level MatterCheck matrix by platform

These are MatterCheck's type-level matrix answers for thermostat, not lab tests of this E40 unit. Values are copied exactly from the matrix.

Product-specific sources differ only in named integrations. LennoxPros lists Amazon Alexa, Google Assistant, Control4, Building36, and Matter. Aero DS's June 2026 post says the E40 works with Alexa, Google Assistant, Control4, Building36, "and more." Neither E40 page names Apple Home. Aero DS separately says Apple HomeKit is on the M40, not the E40.

Lennox E40 cross-platform support comparison

Across the seven thermostat rows, every platform has Y for pairing and control. Google Home, SmartThings, Home Assistant, Homey, and Hubitat also show Y for starting automations. Apple Home and Amazon Alexa show Unknown for starting automations. All seven show Y for being controlled by automations. For general sharing behavior, see MatterCheck's Matter multi-admin guide; the E40 sources do not give platform-by-platform enrollment sequences.

Lennox E40 setup, dealer support, and app control

LennoxPros says setup and onboarding guide you step-by-step through Wi-Fi connection, account creation, feature customization, scheduling, alerts, and Away Mode. It also says remote access works through the Lennox Home app. Alpine Refrigeration's 2026-10-01 page gives E40 dealer support steps: from the home screen, tap Menu, then Lennox Dealer Support (or Settings > Dealer Support Services); select Local Lennox Dealer Info and verify contact fields; open Dealer Support Access; and toggle Remote Sharing, Alerts and Notifications, and Advanced Diagnostics & Troubleshooting to ON. Alpine says there is no charge to enable Dealer Support Access.

Neither LennoxPros nor Alpine provides Alexa, Google Home, Apple Home, SmartThings, Home Assistant, Homey, or Hubitat pairing menu names for the E40. For general thermostat support, see MatterCheck's Matter thermostat support guide.

Lennox E40 specifications and accessory limits

• Display and physical: LennoxPros lists a 5-inch color display, 3.375 × 5.375 × 1 in product dimensions, 4.5 lb gross weight, and touchscreen type.
• Scheduling and recovery: LennoxPros lists 7-day programmability, automatic changeover, intelligent recovery, Schedule IQ, and up to four separate 7-day schedules plus Schedule IQ.
• Comfort features: Feels Like technology accounts for humidity; Smart Away uses homeowner inputs and geo-fencing; One-Touch Away Mode overrides regular programming; remote access works through the Lennox Home app.
• HVAC compatibility: LennoxPros says universal 2H/2C conventional, 4H/2C heat pump, and dual fuel Aux/Emergency Heat. Aero DS says up to 3H/2C heat pump or 2H/2C conventional configurations.
• Diagnostics: LennoxPros says advanced diagnostics monitor system performance, provide alerts, and allow remote sharing with Lennox dealers; performance reports show run times, temperature ranges, and system behavior; custom equipment profiles are available.
• Accessories: LennoxPros's Smart Air Quality Monitor page says the E40 pairs with that monitor over a proprietary BLE Mesh network, supports one monitor and up to six smart devices per network, and displays CO2, PM2.5, and VOC readings. The monitor can trigger air cleaning equipment.
• Matter/firmware: CSA-IoT lists Firmware Version 04.38.0087, Hardware Version A, Matter Specification Version 1.3, Transport Interface Wi-Fi, Primary Device Type ID 0x0301, Product ID 0x0305, Vendor ID 0x1356, and Family SKU 22V24/108296-01.
• Warranty: LennoxPros says the E40 comes with a 5-year warranty; Aero DS says 5-year warranty on pro installation by a certified Lennox dealer.

Lennox E40 price in the provided pages

None of the provided Lennox pages shows an E40 price. The LennoxPros E40 product page shows Add to Cart and stock lookup, but no price in the text. Matter Alpha's E40 page lists manufacturer part number 108878 and shows no reviews, but no E40 price; the Amazon US $79.99 line on that page is for the meross Smart Thermostat for Electric Baseboard Heater MTS215, not the Lennox E40. Alpine Refrigeration's page also has no price. LennoxPros shows Add to Cart with dealer stock lookup; call a local Lennox dealer or check the LennoxPros cart for a live quote. The L40 lists at $249 and S40 at $707 on Amazon per Matter Alpha (2025-12-12), so expect the E40 to sit between them.

Lennox E40 Smart Thermostat: buy or skip

• Buy if you want a Wi-Fi Matter-certified Lennox thermostat for multi-stage, non-communicating HVAC, and the LennoxPros/Aero DS feature list matches your system: universal heat-pump/conventional compatibility, Schedule IQ, Smart Away, One-Touch Away, and Lennox Home app remote control.
• Skip if you need verified platform-specific behavior beyond the thermostat type matrix, or if Apple Home support must be confirmed in Lennox's own E40 materials; the E40 sources do not name Apple Home. If Apple Home is a requirement, the Aero DS page names Apple HomeKit only on the M40, not the E40; confirm with Lennox or choose the M40 instead.
• Skip if you need a listed price before choosing; the provided pages do not state an E40 price.