UK cleantech company making the Zero Emission Boiler (ZEB), a heat-battery boiler that slots into existing wet central heating systems as a direct replacement for gas and oil boilers.
Green Score
- Greenwashing risk
- low
- Data confidence
- low
- Method
- how it is calculated
Climate Impact & Solution35%72
Does the core business genuinely avoid or reduce emissions, or build climate resilience? Share of revenue that is actually 'green'. Fossil-dependent models score low.
The ZEB eliminates point-of-use fossil combustion and, when smart-charged on low-carbon off-peak electricity, an independent climate impact report estimates savings of up to 2 tCO₂e per household per year versus gas by 2030 — a credible and material per-unit benefit, though aggregate installed-base impact is still small given hundreds-scale deployments.
Decarbonization & Targets20%18
Credible, science-based targets (SBTi), a real net-zero plan with progress to date, and CDP disclosure — not just a dated press release.
No SBTi-validated near-term or net-zero targets were found in any public record; no CDP disclosure was identified; tepeo's website references a commitment to transparency and environmental accountability but publishes no quantified Scope 1/2/3 inventory or time-bound reduction pathway, leaving climate pledges at the level of mission statements rather than verified science-based targets.
ESG & Operations15%42
Operational footprint, labour and social practices, and governance quality across the company's own operations and supply chain.
Tepeo claims to run an 'ethical, transparent business that puts people and the planet first' and is described as legally committed to high standards of accountability, but no independently audited ESG report, GHG inventory, labour-practice disclosure, or supply-chain assessment was found in public sources; the company is a ~60-person private startup so institutional-grade ESG infrastructure is not yet expected but its absence limits scoring.
Transparency & Verification15%28
Quality of disclosure, independent third-party verification, and how much hard data backs the company's claims.
Tepeo provides a public carbon calculator, per-unit emissions comparisons with cited grid-intensity data, and a product-level independent climate impact report, which is above average for a company of its size; however, there is no company-level sustainability report, no third-party-verified GHG inventory, no CDP response, and the 'independent climate impact report' is not publicly linked to a named, auditable methodology or certifier.
Integrity15%80
Controversies, litigation, pollution, fossil-fuel lobbying, conflict-zone involvement and governance scandals. Higher means cleaner.
No material controversies, litigation, pollution incidents, fossil-fuel lobbying, or governance scandals were identified in any public source; tepeo's investors include the UK government-backed Clean Growth Fund and Innovate UK, and no red flags emerged from media or regulatory searches.
Why it's on ClimateTicker
Tepeo makes the Zero Emission Boiler (ZEB), a heat-battery that replaces fossil-fuel boilers and uses off-peak, lower-carbon grid electricity to deliver wet central heating — directly addressing UK residential heating, which accounts for roughly 17% of national carbon emissions. The core technology is genuinely mitigation-oriented and fills a real gap for the ~40% of UK homes unsuitable for heat pumps. However, tepeo is an early-stage company with sales still in the hundreds, no SBTi-validated targets, no CDP disclosure, and no independently verified company-level sustainability reporting, so the climate thesis rests almost entirely on product logic rather than demonstrated or audited impact at scale.
Commitments & Certifications
Controversy & Greenwashing Watch
The ZEB's 'zero emission' name refers only to point-of-use combustion; actual lifecycle carbon savings depend on grid intensity and smart-charging behaviour, a nuance tepeo acknowledges in its FAQ but that the product name itself can obscure for less-informed buyers.tepeo.com
As of late 2023, ZEB sales were 'in the hundreds', meaning aggregate avoided emissions are still negligible at a national scale, creating a gap between the scale of the climate problem tepeo markets against and its current real-world impact.energymonitor.ai
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