Improve air quality without losing the romance

envflame is a rechargeable insert for existing log-burning stoves. It recreates the glow and movement of a real fire—without the PM2.5 pollution. A practical pathway for cleaner neighbourhoods, healthier homes, and happier residents.

Developed by METAMORPHORCES.

Demonstration of the envflame 'zephyr' cartridge operating inside a standard log-burning stove (no combustion, zero indoor smoke).

The air quality problem (as supplied)

The following figures are taken from our briefing text and public discourse. We will work with partners to validate and localise these figures during pilot design.

PM2.5

Fine particulate matter small enough to enter the bloodstream; associated with cancer, strokes, and asthma.

8% → 17%

Only 8% of English households use log burners, yet they account for 17% of national PM2.5 emissions.

×750

A single log burner can be up to 750× more polluting than an HGV, by PM2.5 per unit energy used.

Note: We support ULEZ-style initiatives but domestic combustion accounts for a greater source of PM2.5 pollution than diesel engines. Without reducing doemstic combustion there will be no clean air

A drop‑in, rechargeable insert for existing stoves

  • Zero smoke, zero soot: ambience without combustion. Keeps walls, lungs, and air monitors clean.
  • Fits existing stoves: removable cartridge slots into standard fireplaces for instant transformation.
  • Cheaper to run: lower operating cost than burning logs. (Central heating still required for warmth.)
  • Fast adoption: voluntary upgrade that preserves the romance of a real fire—encouraging widespread take‑up.

For Councils & Combined Authorities

Pair envflame with local clean air programmes, school streets, and public health initiatives. Offer targeted vouchers or trade‑in schemes to households using stoves for ambience.

  • Household pilot (100–1,000 homes) in priority wards
  • Before/after PM2.5 monitoring with resident consent
  • Public health & comms partnership for behaviour change
Envflame cartridge placed inside a traditional log-burning stove, glowing like a real fire

A realistic flame visual produced by the envflame insert — ambience retained, PM2.5 eliminated at source.

Measurable outcomes for clean‑air strategies

PM2.5 reduction

Modelled reduction proportional to participating households, with validation via local sensors.

Health co‑benefits

Lower exposure risk for children, the elderly, and those with asthma — aligned to ICS & public health targets.

Public support

A positive alternative to outright bans: preserve ambience, improve air — fewer complaints, faster adoption.

We will co‑design monitoring and evaluation with your Air Quality, Sustainability, and Public Health teams.

Pilot, scale, and funding options

Stage 1 — Feasibility & design (6–10 weeks)

  • Localised data and targeting model
  • Stakeholder mapping: residents, stove retailers, health partners
  • Technical fit assessment across common stove types
  • Finalise evaluation framework (sensors, sampling)

Stage 2 — Household pilot (3–6 months)

  • Deploy 100–1,000 inserts with training & comms
  • Before/after PM2.5 measurement & reporting
  • Resident satisfaction, cost, and adoption rates
  • Iterate hardware for mass‑market price point

Possible funding routes

  • UK Shared Prosperity / Levelling Up
  • Air Quality & Public Health budgets
  • Green innovation & climate funds
  • Corporate sponsorship / CSR

Your role

Select pilot wards, help recruit households, enable data collection, and co‑shape the adoption incentives.

Our role

Provide hardware, installation guidance, resident comms, and rigorous monitoring & evaluation — in partnership with your teams.

Partner with us to deliver cleaner air — without sacrificing what people love.

We’re currently raising capital to scale manufacturing and reduce unit cost for mass adoption. Let’s co‑design a pilot that fits your borough’s clean‑air strategy.

Get in touch

Councils, combined authorities, and public health teams: we’d love to share the pilot blueprint and evaluation templates. Please include your borough and team in the message.

By submitting, you agree we may contact you about a pilot and investment opportunities.