Smart HVAC System Patent Landscape 2026
Smart HVAC System Patent Landscape in 2026
The smart HVAC system patent space is moderately concentrated, with Lennox Industries leading among the top hundred filers and the field anchored in air-conditioning control and regulating-systems classes. Annual filing volume has plateaued near its 2018 peak, with adjacent branches in AI-based computing and digital communications remaining comparatively sparse.
Lennox leads a moderately concentrated field with an active second tier
Lennox Industries holds the top position among the ranked applicants, followed closely by the Commonwealth Scientific and Industrial Research Organisation and North Park Innovations Group Inc, which are tied for second place. Resideo LLC and International Business Machines Corporation round out the top five.
The top five filers collectively account for 34% of the hundred largest filers’ combined total, indicating moderate concentration. A meaningful second tier — including Schneider Electric Buildings Americas, Energy Cloud Inc, and Silvair — keeps the competitive field from being dominated by a single incumbent.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Lennox Industries Inc | 20 | |
| 2 | COMMONWEALTH SCI & IND RES ORG | 11 | |
| 3 | North Park Innovations Group Inc | 11 | |
| 4 | Resideo LLC | 10 | |
| 5 | International Business Machines Corporation (IBM) | 8 | |
| 6 | Schneider Electric Buildings Americas Inc | 6 | |
| 7 | Energy Cloud Inc | 6 | |
| 8 | Silvair Sp. z o.o. | 6 | |
| 9 | Bert Labs Pte Ltd | 4 | |
| 10 | Rasser de Haan BV | 4 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Wall to Wall LLC | 3 | |
| 12 | Siemens Industry Inc | 3 | |
| 13 | MZAC LLC | 3 | |
| 14 | Innovative Lighting LLC | 3 | |
| 15 | Google LLC | 3 | |
| 16 | ConnectM Technology Solutions Inc | 3 | |
| 17 | Vivint Inc | 3 | |
| 18 | Friedrich Air Conditioning LLC | 3 | |
| 19 | Rheem Manufacturing Co | 2 | |
| 20 | United States Government (as represented by a federal agency) | 2 |
Lennox’s leading position, concentrated in air-conditioning and ventilation control, signals that established HVAC OEMs are the primary patent-builders; however, the presence of software and cloud-platform firms such as IBM and Energy Cloud shows that the competitive boundary is expanding toward IoT and building-management software.
Filing counts for the most recent 18–24 months are subject to publication lag and likely understate actual activity; interpret 2024–2026 data accordingly. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing volume plateaued after a 2018 peak; core HVAC control dominates the technology mix
The annual filing trend and technology composition charts together reveal a field that matured around 2018 and is now sustained at a lower but stable rate, with F24F air-conditioning and ventilation patents overwhelmingly dominant and several adjacent digital and AI branches remaining lightly populated.
Annual filing trend
Filings peaked at 20 in 2018 and have since oscillated between 5 and 13 annually, settling around 9 per year in the most recent periods. Given publication lag, 2024–2026 counts should be treated as floors rather than final totals.
↗ Hover for values · click a bar to ask EurekaTechnology composition
F24F (air conditioning and ventilation) is the dominant branch by a wide margin, followed by G05B (control and regulating systems). Branches such as H04L (digital information transmission), G06F (electric digital data processing), and G06N (AI-based computing) hold notably smaller shares, pointing to areas where technical convergence is still early-stage.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Intelligent hvac register
Intelligent HVAC register is an HVAC register outlet which can control the temperature in a space by operating independently. The Intelligent HVAC register works in network with other vents within the system using low power wireless technology and a smart application so that the temperature of multiple individual spaces can be controlled while operating on… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | HVAC control system and method | 216 |
| 2 | HVAC control system and method | 126 |
| 3 | Method and device to set household parameters base… | 117 |
| 4 | Smartvent and atmospheric controller apparatuses, … | 100 |
| 5 | HVAC control system and method | 98 |
| 6 | Smart vent and atmospheric controller apparatuses,… | 77 |
| 7 | Cloud based HVAC management apparatus and system f… | 64 |
| 8 | Intelligent grid-based HVAC system | 50 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the patent structure means for R&D investment decisions
The combination of a maturing lifecycle, moderate concentration, minimal co-filing activity, and a US-dominant jurisdiction profile shapes the strategic context for any new entrant or existing participant.
Field at plateau: core HVAC control well-defended, adjacent layers still open
Annual filings have plateaued near the 2018 peak, placing the field in a maturity stage. Core F24F control patents are dense, making incremental improvement claims increasingly difficult to differentiate. R&D investment is better directed toward integrating AI inference (G06N) or network-layer intelligence (H04L) into HVAC control loops, where filing density remains low.
Lifecycle: MatureModerate concentration with a credible second tier
The top five filers hold 34% of the hundred largest filers’ combined total — concentrated enough that incumbents have meaningful defensive portfolios, but open enough that challengers can establish positions. The second tier (Schneider Electric Buildings Americas, Energy Cloud Inc, Silvair, Bert Labs) represents firms that have staked out differentiated sub-spaces such as building automation protocols and cloud-based energy management, signaling viable entry niches.
Concentration: ModerateNo co-filing partnerships identified in the current corpus
The collaboration evidence is pending — no co-applicant pairs were detected in the current dataset. This absence may reflect the prevalence of proprietary development strategies among the leading OEMs and software firms, or it may indicate that cross-sector partnerships (e.g., HVAC manufacturer plus IoT platform provider) have not yet materialized in formal joint filings. This represents a potential white space for consortium-based R&D.
Collaboration: SparseUS-centric portfolio with limited international extension
The United States is the lead filing jurisdiction by a significant margin, with India as the second most active jurisdiction. Europe (EPO), Canada, and WIPO (PCT) each register smaller but non-trivial activity. The relatively light PCT and EPO footprint suggests that many filers are not pursuing broad international protection, which may leave coverage gaps exploitable by applicants willing to file in European and Asia-Pacific markets.
Geography: US-ledGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
Co-filing pairs, ranked by the number of jointly-filed patent families.
Lennox Industries leads on HVAC control depth; Energy Cloud is a notable new entrant in cloud-based management
The top two ranked applicants differ markedly in strategic emphasis: Lennox concentrates on air-conditioning and ventilation control at the device level, while Energy Cloud enters the corpus as a new filer focused on cloud-based HVAC management and air-quality control.
Lennox Industries
Lennox Industries holds 20 patent records — the largest share among ranked applicants — concentrated in F24F air-conditioning and ventilation control, with secondary coverage in G05B regulating systems. Its momentum is flagged as a new entrant in the recent filing window, suggesting a relatively recent surge of activity rather than a long-standing steady portfolio, consistent with a strategic push into smart controls.
patent records: 20Energy Cloud Inc
Energy Cloud Inc holds 6 patent records and is also marked as a new entrant in the recent filing window, indicating that its entire corpus activity is concentrated in the recent period. Its technology focus spans F24F air-conditioning and ventilation control alongside F24F air filtration (F24F 8), positioning it at the intersection of smart climate management and air-quality monitoring — a differentiated niche relative to the device-control leaders.
patent records: 6| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Lennox Industries Inc | 5 | ▲ new entrant |
| Energy Cloud Inc | 4 | ▲ new entrant |
AI-based computing and digital communications are under-served relative to their technical relevance
Within the broader technology composition, several branches sit at low filing density despite clear technical relevance to smart HVAC applications; these represent under-served adjacent areas worth monitoring rather than validated commercial gaps.
G06N · AI-based computing models
G06N accounts for only 8 patent records — a 2% share of the IPC distribution — despite the well-documented applicability of machine learning to predictive HVAC control, occupancy modeling, and fault detection. Filing density here is low relative to the core F24F and G05B branches. Entrants with ML-based HVAC optimization algorithms could potentially establish positions in this sub-space with targeted filings, provided claims are drafted to extend beyond generic AI method claims.
Search this in Eureka →H04L · Digital information transmission
H04L holds 24 patent records (6% of the IPC distribution), indicating early-stage coverage of communication-layer innovations — including protocol design, secure data transmission, and building-network integration — within the smart HVAC context. Given the industry’s trajectory toward cloud-connected and interoperable building systems, the relative sparsity of H04L filings suggests room for applicants focused on HVAC-specific network protocols, cybersecurity for building controls, or edge-to-cloud data pipelines.
Search this in Eureka →How leading applicants differ across HVAC control, regulating systems, and communications routes
Strength of each leader across the main technology routes.
| Player | F24F 11 · Air conditioning & ventilation | G05B 15 · Control & regulating systems | F24F 110 · Air conditioning & ventilation | G05D 23 · Control of non-electric variables | G05B 13 · Control & regulating systems |
|---|---|---|---|---|---|
| Lennox Industries Inc | Strong · 20 | Absent | Moderate · 7 | Absent | Emerging · 4 |
| Commonwealth Scientific and Industrial Research Organisation (CSIRO) | Strong · 8 | Absent | Absent | Absent | Strong · 6 |
| International Business Machines Corporation (IBM) | Strong · 6 | Absent | Strong · 4 | Moderate · 2 | Absent |
| Energy Cloud Inc | Strong · 6 | Absent | Moderate · 3 | Absent | Absent |
| Bert Labs Pte Ltd | Strong · 4 | Strong · 3 | Moderate · 1 | Absent | Moderate · 1 |
Frequently asked questions
Lennox Industries holds the top position among the ranked applicants with 20 patent records, concentrated in air-conditioning and ventilation control (F24F) and regulating systems (G05B).
Annual filings peaked at 20 in 2018 and have since plateaued, oscillating between 5 and 13 per year. The field is in a mature phase — multi-year scope growth remains positive at 4%, but annual volume has eased from its 2018 peak. Recent-period counts (2024–2026) are subject to publication lag.
F24F (air conditioning and ventilation) is the dominant branch, followed by G05B (control and regulating systems). Digital communications (H04L), electric digital data processing (G06F), and AI-based computing (G06N) are present but significantly smaller in filing volume.
The United States is the lead filing jurisdiction, followed by India, Europe (EPO), and Canada. WIPO (PCT) filings are limited, suggesting that many applicants are not pursuing broad multinational protection.
Yes. G06N (AI-based computing) and H04L (digital information transmission) are notably sparse relative to their technical relevance to smart HVAC. These branches may offer entry opportunities for applicants focused on ML-driven control optimization or HVAC-specific communication protocols, though they should be treated as observations of relative sparsity rather than validated commercial gaps.
No co-applicant partnerships were identified in the current corpus. The absence of detected co-filing activity suggests that major players are pursuing proprietary development strategies, and formal cross-sector consortia have not yet generated joint patent filings in this dataset.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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