Smokeless Chimney
Hardware and sensor platform for wood stove smoke measurement, combustion control, and power generation.
Website: https://www.smokelesschimney.com/
PUBLIC
| Name | Smokeless Chimney (Acumentor LLC) |
| Tagline | Hardware and sensor platform for wood stove smoke measurement, combustion control, and power generation. |
| Headquarters | Centralia, USA |
| Founded | 2018 |
| Stage | Pre-Seed |
| Business Model | Hardware + Software |
| Industry | Cleantech / Climatetech |
| Technology | Hardware |
| Geography | North America |
| Founding Team | Solo Founder (Noel Putaansuu) |
Links
PUBLIC
- Website: https://www.smokelesschimney.com/
- LinkedIn: https://www.linkedin.com/company/acumentor-llc-dba-smokeless-chimney/
- YouTube: https://www.youtube.com/channel/UCag5yiu_Xt-cTTgToXIzYqA
Executive Summary
PUBLIC Smokeless Chimney is a hardware startup developing retrofit systems to measure and control smoke emissions from wood stoves, a niche but potentially significant wedge into the residential air quality and climate tech markets. The company's core proposition rests on a patent application for monitoring smoke opacity and adjusting stove combustion, a technical approach aimed at a large installed base of over 10 million wood stoves in the U.S. alone [InnovateFPGA, Oct 2021]. Founder Noel Putaansuu brings over a decade of specialized experience as a fire investigator, having examined hundreds of residential fires, which informs the product's focus on safety and performance [LinkedIn] [CleanTech Alliance, Dec 2022]. The business model combines hardware sales for smoke measurement with a control system designed to improve combustion efficiency, though revenue figures and customer deployments are not publicly available. The company appears to be in a pre-seed, bootstrapped phase, with no disclosed funding rounds or institutional investors; its most recent operational signal is the hiring of a firmware engineering intern in late 2025 [LinkedIn, retrieved 2025]. Over the next 12-18 months, the key milestones to watch are the transition from prototype to commercial product, any validation through pilot programs with utilities or stove manufacturers, and the first signs of institutional capital or grant funding to support manufacturing scale.
Data Accuracy: YELLOW -- Core product claims and founder background are corroborated by multiple sources; market size and funding status rely on single or unverified sources.
Taxonomy Snapshot
| Axis | Classification |
|---|---|
| Stage | Pre-Seed |
| Business Model | Hardware + Software |
| Industry / Vertical | Cleantech / Climatetech |
| Technology Type | Hardware |
| Geography | North America |
| Founding Team | Solo Founder |
Company Overview
PUBLIC Smokeless Chimney operates as a trade name for Acumentor LLC, a Washington State limited liability company based in Centralia [Secretary of State]. The venture was founded in 2018 by Noel Putaansuu, who serves as its president and business owner [The Fire Time Podcast, Oct 2021] [LinkedIn, retrieved 2025]. The founding appears to have been a solo effort, with Putaansuu leveraging a career in fire investigation and insurance that spans more than 35 years to identify a technical problem in residential wood combustion [Seattle Angel Conference] [LinkedIn].
The company's early development milestones are anchored in intellectual property. A patent application for monitoring smoke opacity and controlling a wood stove based on that measurement was filed in 2018, establishing a core technical foundation [freepatentsonline.com, 2018]. By 2021, the company was publicly presenting its concept as a hardware and sensor platform aimed at improving wood stove efficiency and reducing emissions, as evidenced by its participation in the InnovateFPGA competition that year [InnovateFPGA, Oct 2021].
Recent activity suggests a continued, bootstrapped development path. The most recent public signal is the addition of a firmware engineering intern in October 2025, indicating ongoing technical work on the product platform [LinkedIn, retrieved 2025]. No institutional funding rounds, major customer deployments, or formal partnerships have been disclosed through public channels.
Data Accuracy: YELLOW -- Entity and founder details are confirmed by state records and LinkedIn. Founding year and patent application are documented. Recent team addition is confirmed. Lack of third-party validation for funding and commercial milestones.
Product and Technology
MIXED Smokeless Chimney’s public positioning centers on a hardware and sensor platform designed to retrofit existing wood stoves. The company states its core function is to “make hardware to make wood stoves move air out of the home” and to provide “the science to measure smoke from wood stoves” [Smokeless Chimney]. Its primary claimed product is a retrofit combustion control system, which it describes as the only such system available for wood stove chimneys [Smokeless Chimney]. The technology stack is inferred to involve embedded firmware and sensor integration, based on the recent hiring of a firmware engineering intern [LinkedIn].
The platform’s proposed capabilities are broad, encompassing smoke measurement, combustion control, power generation from exhaust heat, and air quality monitoring [Smokeless Chimney]. A foundational patent application from 2018 details a method for “monitoring opacity of smoke exhausted by wood stove and controlling wood stove based on same,” which aligns with the company’s emphasis on measuring opacity, the legal standard for smoke emissions [freepatentsonline.com, 2018]. The company’s YouTube channel hosts demonstration videos aimed at showing how its products can reduce smoke and improve safety [Smokeless Chimney - YouTube].
Public details on product specifications, pricing, or shipping status are absent. The website’s “Reviews” section contains only repeated boilerplate text about the company’s patent rights, not independent user testimonials [Smokeless Chimney website]. The most concrete public signal of active development is the firmware engineering internship that began in October 2025 [LinkedIn].
Data Accuracy: YELLOW -- Core product claims are sourced from the company's own materials; patent application is a public record. No third-party validation of product performance or commercial availability.
Market Research
PUBLIC
The market for wood stove performance and emissions control is driven by a persistent tension between the economic appeal of wood heat and the growing regulatory pressure to curb its environmental impact.
Smokeless Chimney’s addressable market is anchored by the installed base of existing wood stoves. According to a 2021 presentation, there are an estimated 10 million existing wood stoves in the United States alone [InnovateFPGA, Oct 2021]. This figure provides a baseline for the retrofit opportunity, though the company’s public materials do not specify what portion of this base is actively used or located in regions with tightening air quality standards. The serviceable market is further defined by homeowners seeking to improve efficiency and safety, a demand driver underscored by the founder’s published work on improving stove performance through better combustion understanding [CleanTech Alliance, Dec 2022].
Demand tailwinds are visible on two fronts. First, rising energy costs and a desire for off-grid resilience sustain interest in wood as a supplemental heat source, particularly in rural areas. Second, particulate matter (PM2.5) from residential wood burning is a recognized contributor to local air pollution, prompting municipalities and states to consider stricter emission controls or burn bans during poor air quality episodes. The company’s focus on measuring smoke opacity directly addresses this regulatory vector, as opacity is a legally defined metric for emissions compliance [Smokeless Chimney].
Adjacent and substitute markets include the broader smart home HVAC segment and dedicated high-efficiency wood stove manufacturers. The former offers integrated home energy management platforms, while the latter sells complete EPA-certified stove replacements, which represent a more capital-intensive compliance path. Smokeless Chimney’s retrofit positioning suggests it is targeting the cost-conscious segment of the market that seeks to upgrade existing assets rather than replace them entirely.
Installed Wood Stoves (USA) | 10 | million
The single confirmed market sizing point illustrates the sheer scale of the potential retrofit base, but it remains an undifferentiated figure from 2021. Without segmentation by stove age, usage frequency, or geographic regulatory pressure, the conversion rate from this total addressable market to a serviceable obtainable market is unclear.
Data Accuracy: YELLOW -- Sizing claim from a single 2021 presentation; no corroborating independent market report cited.
Competitive Landscape
MIXED Smokeless Chimney's competitive position hinges on a narrow hardware wedge,retrofit smoke measurement and control,in a market otherwise dominated by stove manufacturers and generic air quality monitors.
The competitive analysis that follows is therefore based on adjacent market players and logical substitutes identified through research.
- Incumbent stove manufacturers. Companies like Jøtul, Morsø, and Hearthstone Technologies design and sell high-efficiency wood stoves with integrated combustion systems. Their advantage is a complete, certified appliance sold through established dealer networks. Smokeless Chimney's retrofit approach targets the installed base these manufacturers have already created, but it does not compete with them for new stove sales.
- Smart stove accessories. Aduro, a Canadian company, offers the Smart Response system, an intelligent thermometer and damper control that connects to a mobile app [Adurofire.com]. This represents a direct, feature-level competitor focused on automation and user convenience, though it does not claim the smoke measurement and opacity monitoring central to Smokeless Chimney's patent.
- Air quality sensor companies. A broad adjacent category includes consumer and industrial air quality monitors from companies like Airthings, Awair, and PurpleAir. These devices measure particulate matter (PM2.5) but are designed for ambient room or outdoor monitoring, not for direct, in-stack measurement of combustion opacity which is a regulated metric for wood stoves.
- Regulatory and testing labs. The founder's background in fire investigation intersects with a niche of certified testing organizations that verify stove emissions for EPA compliance. These are service providers, not product competitors, but they represent an alternative path for a stove owner seeking to understand emissions.
Where Smokeless Chimney claims a defensible edge is in its specific patent application for monitoring and controlling wood stove opacity, a legal term for smoke emissions [freepatentsonline.com, 2018]. This IP, if granted and enforceable, could protect its core measurement method. However, this edge is perishable; it relies entirely on the strength and scope of a single patent family in a hardware domain where design-arounds are common. The company's other claimed differentiator,being the "only manufacturer of retrofit combustion control systems" for wood stove chimneys [Smokeless Chimney website],is a market positioning statement, not a confirmed fact, and is vulnerable to any new entrant.
The company is most exposed in distribution and scale. It has no disclosed partnerships with stove dealers, chimney sweeps, or utilities that could provide a sales channel. A competitor like Aduro, which already sells through fireplace retailers and has an app ecosystem, could theoretically add opacity sensing to its product suite, leveraging its existing customer base and route to market. Furthermore, Smokeless Chimney's solo-founder structure and lack of institutional funding place severe constraints on its ability to manufacture at scale, market aggressively, or defend its IP legally against larger entities.
The most plausible 18-month competitive scenario is one of continued niche existence. The "winner" in this segment will likely be the company that first secures a partnership with a major stove manufacturer or a municipal clean-air program, gaining a sanctioned deployment channel. If Aduro or a similar accessory maker secures such a deal, they could rapidly outpace Smokeless Chimney. Conversely, Smokeless Chimney becomes the "loser" if it remains solely a prototype-and-patent operation confined to the founder's direct efforts, unable to transition its technology from a claimed capability to a commercially deployed product with verified customer installations.
Data Accuracy: YELLOW -- Competitor identification is inferred from adjacent markets; Smokeless Chimney's unique claims are sourced from its own website and a patent application.
Opportunity
PUBLIC The opportunity for Smokeless Chimney rests on the potential to retrofit a significant portion of the 10 million existing wood stoves in the United States with its proprietary control and measurement hardware, creating a new category of connected, efficient, and compliant solid-fuel heating systems.
The headline opportunity is the creation of a dominant retrofit standard for wood stove emissions control, a category that currently lacks a clear market leader. This outcome is reachable because the company has staked an early IP position with a patent application for monitoring and controlling smoke opacity [freepatentsonline.com, 2018], and it is targeting a large, fragmented installed base of legacy appliances. The core technology,a hardware and sensor platform that measures and optimizes combustion,addresses a clear regulatory and environmental pain point: reducing particulate emissions from residential wood burning. If the product works as claimed and achieves any form of regulatory endorsement or utility partnership, it could become the default upgrade path for millions of stove owners seeking better performance and compliance, moving from a niche hardware maker to a category-defining platform.
Multiple paths could drive the company toward that scale. The most plausible scenarios involve leveraging specific catalysts to move beyond direct-to-consumer sales.
| Scenario | What happens | Catalyst | Why it's plausible |
|---|---|---|---|
| Utility-Driven Retrofit Programs | Municipalities or power utilities, incentivized to improve local air quality, subsidize or mandate the installation of Smokeless Chimney systems in high-use areas. | A pilot partnership with a public utility or an air quality district, using the company's smoke measurement data for compliance reporting. | The founder's published expertise on wood stove performance suggests an ability to engage with regulatory bodies [CleanTech Alliance, Dec 2022]. Utility-led efficiency programs for other appliances are a proven model. |
| OEM Integration & White-Label | Major wood stove manufacturers license the combustion control and measurement technology as a premium, smart feature for new stoves, embedding it at the factory. | A design-win with a single mid-tier stove manufacturer, validating the technology's performance and reliability. | The company's focus on retrofit implies the technology is stove-agnostic, a key feature for OEM partnerships. The founder's background in fire testing provides credibility with manufacturers [Seattle Angel Conference]. |
Compounding for Smokeless Chimney would likely manifest as a data and distribution flywheel. Each installed unit generates proprietary combustion data, which could be used to further refine control algorithms, creating a performance moat that improves with scale. Furthermore, successful deployments in one geographic region,particularly those with strict air quality rules,could serve as a reference case to accelerate adoption in similar markets. The recent addition of a firmware engineering intern [LinkedIn, retrieved 2025] is a small but tangible signal of investment in the software and data layer that would enable this flywheel.
The size of the win, should a utility or OEM integration scenario play out, can be framed by looking at adjacent hardware-centric climatetech exits. For example, smart thermostat companies have achieved valuations in the hundreds of millions to billions of dollars by becoming central to home energy management. While Smokeless Chimney's initial market is more niche, capturing even a single-digit percentage of the 10-million-unit U.S. installed base [InnovateFPGA, Oct 2021] at a hardware and potential service revenue multiple could support a company valued in the high tens or low hundreds of millions of dollars (scenario, not a forecast). This represents a substantial outcome for a hardware startup operating in a traditionally low-tech corner of the home heating market.
Data Accuracy: YELLOW -- Market size cited from a single source; opportunity scenarios are extrapolated from company claims and founder background.
Sources
PUBLIC
[InnovateFPGA, Oct 2021] Smokeless Chimney - InnovateFPGA | http://www.innovatefpga.com/cgi-bin/innovate/teams.pl?Id=AS041
[LinkedIn] Noel Putaansuu's LinkedIn Profile | https://www.linkedin.com/in/noel-putaansuu/
[CleanTech Alliance, Dec 2022] Smokeless Chimney - “Understanding Dwell Time Improves Wood Stove Performance” - CleanTech Alliance | https://www.cleantechalliance.org/2022/12/12/smokeless-chimney-understanding-dwell-time-improves-wood-stove-performance/
[Secretary of State] Washington Secretary of State | Business Entity Search - Secretary of State | https://secretaryofstate.com/washington/
[The Fire Time Podcast, Oct 2021] Noel Putaansuu - The Wood Burn…-The Fire Time Podcast | https://podcasts.apple.com/ca/podcast/noel-putaansuu-the-wood-burning-certification-process/id1433804268?i=1000539763343
[Seattle Angel Conference] Acumentor LLC dba Smokeless Chimney - Seattle Angel Conference | https://seattleangelconference.com/companies/acumentor-llc-dba-smokeless-chimney/
[Smokeless Chimney] Smokeless Chimney website | https://www.smokelesschimney.com/
[freepatentsonline.com, 2018] MONITORING OPACITY OF SMOKE EXHAUSTED BY WOOD STOVE AND CONTROLLING WOOD STOVE BASED ON SAME - ACUMENTOR LLC | https://www.freepatentsonline.com/y2018/0209903.html
[Smokeless Chimney - YouTube] Smokeless Chimney YouTube Channel | https://www.youtube.com/channel/UCag5yiu_Xt-cTTgToXIzYqA/about
[Smokeless Chimney website] Smokeless Chimney Reviews page | https://www.smokelesschimney.com/reviews
[Adurofire.com] Intelligent thermometer from Aduro | See Aduro Smart Response App from Aduro | https://www.adurofire.com/accessories/aduro-smart-response/
[LinkedIn, retrieved 2025] Rakhshan Sayed's LinkedIn Profile | https://www.linkedin.com/in/rakhshan-sayed/
Articles about Smokeless Chimney
- Smokeless Chimney's Retrofit Hardware Takes Aim at the Wood Stove's Opacity — With a patent for measuring and controlling smoke, the bootstrapped venture is betting on the 10 million existing stoves in the U.S. as a decarbonization wedge.