firewood
Enable an agent to recognise firewood, assess a particular lot's condition and suitability, and decide how it may be prepared, stored, moved or used as fuel.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise firewood, assess a particular lot's condition and suitability, and decide how it may be prepared, stored, moved or used as fuel.
Firewood is woody biomass prepared or collected as logs, billets, branches or similar pieces for direct combustion to produce heat.
It can be Classify and separate lots by wood identity, form, condition and documented material history.; Measure representative pieces for dimensions, moisture and quantity using explicit methods.; Cut, split, stack or relocate pieces to meet a documented preparation or storage need.; Assess readiness for a specified combustion use and identify evidence still needed.; Compare available fuel quantities and energy estimates on matching measurement bases.; Trace origin and assess whether a proposed movement or use meets applicable requirements..
Distinguishing features
The material is identifiable as wood and is designated for fuel use; species and shape alone do not distinguish firewood from timber.
Pieces retain wood structure rather than being carbonised into charcoal or densified into pellets or briquettes.
The intended handling and feeding unit is a log, round, branch, split piece or kindling piece; bulk chipped material requires a neighbouring fuel classification.
A claim such as seasoned, kiln-dried or ready to burn describes a condition or processing history and must be checked separately from firewood identity.
Painted, treated or composite wood offered for burning requires an explicit boundary and suitability decision; a fuel designation does not establish acceptable use.
Scope
+ Individual fuelwood pieces and lots of rounds, split logs, branches or kindling
+ Wood species or species mixture, bark content and material history
+ Piece dimensions, quantity and the basis on which quantities are reported
+ Moisture condition, drying history, decay and contamination
+ Suitability for a specified combustion appliance or use
+ Harvest provenance, storage condition and movement constraints
- Standing trees, forest ecosystems and forest management plans
- Timber and lumber whose designated use is construction or manufacture
- Charcoal, pellets, briquettes and bulk wood chips as distinct processed fuels
- Stoves, fireplaces, boilers and their installation or maintenance
- Combustion events, chimney deposits and generated ash
- Fuel sales contracts and delivery services
Characteristics
- Fuel designation and physical form
- rounds | split logs | branches | kindling | mixed | unresolved Establishes the firewood sense and the preparation or feeding operations relevant to the pieces.
- Wood identity
- Identified species or species group; mixture proportions with stated basis; unknown Supports interpretation of drying, density and combustion observations without treating all wood as equivalent.
- Lot membership
- Piece or sample linked to a harvest, preparation, storage or delivery lot Determines which pieces a measurement or provenance claim represents.
- Piece dimensions
- Length and cross-sectional dimensions in mm or cm, including range and sampling basis Supports appliance fit, handling and decisions about cutting or splitting.
- Moisture content
- % with wet-basis or dry-basis designation, method, sampling location and date Makes drying and fuel-readiness assessments interpretable and comparable.
- Drying and wetting history
- Freshly cut | air-drying | kiln-processed | re-wetted | unknown; dated supporting observations Separates process labels from the lot's current measured condition.
- Mass and volume
- kg; solid, stacked or loose m³ explicitly distinguished; moisture condition recorded Prevents unsupported comparisons between differently measured quantities.
- Bark, decay and foreign material
- Observed extent of bark, rot, mould, soil, coatings, preservatives, adhesives or embedded objects; unknown where unassessed Supports sorting and identifies material requiring further assessment before handling or burning.
- Heating value
- MJ/kg or kWh/kg; gross or net; dry or as-received basis; measured or estimated Allows energy comparisons only when the reference conditions and uncertainty are explicit.
- Intended combustion use
- Specified appliance or use linked to its documented fuel requirements Makes suitability a judgement about a concrete use rather than a universal property.
- Origin and movement history
- Source location, harvest or recovery route, supplier, treatment evidence and destinations Supports traceability and assessment of applicable sourcing or movement requirements.
- Storage exposure
- Ground contact, rain exposure, cover, airflow, stack arrangement and observed pest activity Supports decisions about continued drying, deterioration and handling.
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.firewood
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 7 bundles · 13 layers · 21 findings · 33 questions.
Firewood identity Recognise wood designated for fuel and establish the pieces represented by a lot.
Firewood is identified partly by intended use, while mixed lots can contain materially different pieces.
Fuel form and boundary
Distinguish firewood forms from neighbouring wood products and fuels.
Piece form and fuel designation
Record physical form and evidence that the wood is designated for direct fuel use.
- Are these rounds, split logs, branches, kindling or another form, and what establishes their fuel designation? definition
- Does any material belong under timber, wood chips, densified fuel, charcoal or a waste-wood model? boundary
Wood and lot composition
Describe wood identity and the limits of lot-wide claims.
Species mixture and membership
Record species evidence, mixtures and the rule grouping pieces into a lot.
- Which species or species groups are identified, by what evidence, and which remain unknown? provenance
- Which pieces share this lot identity, and how are materially different sublots distinguished? definition
Piece size and quantity Describe usable piece geometry and the amount of firewood available.
Log fit and fuel quantity depend on dimensions, moisture and whether volume includes spaces between pieces.
Log geometry
Assess the distribution of piece sizes against handling and feeding needs.
Dimensions and preparation
Record dimensions and identify pieces needing cutting or splitting.
- What are the measured length and cross-sectional ranges, and how were pieces sampled? measurement
- Which pieces require cutting or splitting for the specified appliance or handling method? action
Fuel quantity basis
Make mass and volume claims interpretable.
Mass, volume and voids
Distinguish weighed mass from solid, stacked and loose volume.
- Was quantity measured as mass, solid volume, stacked volume or loose volume, and under what moisture condition? measurement
- If quantities were converted, what lot-specific evidence supports the density or stacking factor used? provenance
Moisture and storage Assess current moisture and the conditions governing drying or re-wetting.
Elapsed storage time and drying labels cannot alone establish the current condition of a heterogeneous firewood lot.
Moisture evidence
Record moisture measurements with enough context to judge their coverage.
Representative moisture
Capture measurement basis, method and variation within and between pieces.
- What moisture values were obtained, on which mass basis and using which method or instrument settings? measurement
- Were measurements taken on outer surfaces or freshly exposed interiors, and how well do sampled pieces represent the lot? measurement
Drying and exposure
Connect drying history with current storage observations.
Storage-driven condition
Record cutting, splitting, drying and wetting events alongside storage arrangement.
- What dated evidence supports seasoning or kiln-processing claims, and has the wood been exposed to water since then? provenance
- What changes to cover, ground separation, airflow or stack arrangement are indicated by the observed condition? action
Material condition Assess wood deterioration, foreign material and uncertain prior use.
Wood-like appearance and fuel designation do not establish that every piece has an acceptable material history.
Treatment and contamination
Identify coatings, preservatives, composite constituents and foreign objects.
Prior use and foreign material
Separate documented material history from visual inspection and unresolved uncertainty.
- Is there evidence of painting, preservative treatment, adhesive bonding or prior use that changes the material's classification? provenance
- Which pieces need segregation or further assessment because of coatings, embedded metal, debris or unknown history? action
Biological condition
Describe decay, mould and signs of organisms without assuming their identity.
Decay and organism evidence
Record the extent and distribution of deterioration or pest signs.
- What proportion of the lot shows rot, mould, galleries, larvae or other organism evidence, and how was it inspected? measurement
- Which observations require identification or segregation before storage, movement or use can be assessed? action
Combustion suitability Evaluate firewood against a specified combustion use and interpret its energy value.
Fuel suitability depends on the receiving appliance, while useful heat cannot be inferred from wood quantity alone.
Appliance and fuel match
Compare the lot's properties with documented requirements for its intended use.
Use-specific readiness
Record supported suitability decisions and outstanding evidence.
- What appliance or combustion use is intended, and what documented requirements apply to fuel form, dimensions, moisture and material history? boundary
- Does the assessed lot meet those requirements, or must it be dried, resized, sorted or excluded from that use? action
Energy characterisation
Represent heating value without conflating fuel energy with delivered heat.
Heating value basis
Qualify measurements and estimates by moisture basis and calorific convention.
- Is heating value measured or estimated, gross or net, and reported for dry wood or the lot as received? measurement
- Which assumptions belong to the appliance or combustion process when estimating delivered heat from this fuel? boundary
Origin and movement Trace the wood's source and assess a proposed movement using applicable evidence.
A firewood lot's origin and processing history can affect sourcing and transport decisions independently of its fuel quality.
Source traceability
Link a lot to its harvest or recovery origin and subsequent mixing.
Harvest or recovery chain
Record source locations, suppliers and evidence supporting origin claims.
- Where and through what harvest or recovery route did the wood originate, and what records support that account? provenance
- Have lots been mixed or repackaged in ways that limit the origin claims applicable to these pieces? boundary
Movement eligibility
Assess a concrete transport route and distinguish drying claims from treatment evidence.
Route and treatment evidence
Record requirements and supporting documents for the proposed origin, destination and date.
- Which current requirements apply to moving this firewood between the specified locations on the proposed date? action
- If a treatment claim supports movement, what documented process and certification establish compliance beyond a kiln-dried label? provenance
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This describes untreated wood used as piece fuel; firewood is a heterogeneous material, not a pure chemical substance with one universal CAS number or fixed melting and boiling points.
- Moisture and calorific values are approximate; verify moisture basis, species, sampling method and net versus gross calorific value before comparison.
- Confirm applicable standard editions, customs subheadings and local rules during research; no sources were consulted for this recall.
- Which of these check these first hold for the sense of firewood this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Hardwood firewood
- Softwood firewood
- Green or freshly cut firewood
- Air-seasoned firewood
- Kiln-dried firewood
- Which of these kinds and varieties hold for the sense of firewood this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Harmonized System (HS), World Customs Organization - 4401 - This heading includes fuel wood in logs, billets, twigs, faggots or similar forms, alongside other wood fuels and residues; it is not exclusive to firewood.
- Which of these identifiers and schemes hold for the sense of firewood this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- ISO 17225-5, International Organization for Standardization: specifications and classes for graded firewood.
- ISO 18134 series, International Organization for Standardization: determination of moisture content in solid biofuels.
- Which of these standards and regulation hold for the sense of firewood this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Space heating in wood stoves, fireplaces and boilers
- Cooking in domestic and commercial wood-fired appliances
- Water heating
- Campfires and recreational fires
- Process heat in small-scale ovens and kilns
- Which of these real-world use hold for the sense of firewood this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Moisture content of seasoned firewood, on a wet-mass basis - 15-25 - % by mass
- Net calorific value at approximately 20% moisture content on a wet-mass basis - 14-15 - MJ/kg
- Which of these typical measurements hold for the sense of firewood this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Wet fuel makes ignition harder, reduces useful heat and can increase smoke and creosote formation.
- Incomplete combustion produces carbon monoxide and fine particulate pollution.
- Creosote accumulation in flues can lead to chimney fires.
- Sparks, embers and radiant heat can ignite nearby combustible materials.
- Transported firewood can carry insects and plant pathogens; damp storage can promote fungal decay.
- Which of these failure modes and hazards hold for the sense of firewood this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Available tree species, drying conditions and customary log dimensions vary by region.
- Firewood may be sold by mass, stacked volume or loose volume; customary measures such as the cord require attention to stacking and local definitions.
- Restrictions on firewood movement and residential wood burning vary by jurisdiction.
- Which of these regional variation hold for the sense of firewood this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Wood - Wood is the underlying biological material; firewood is wood selected or prepared for use as fuel.
- Fuelwood - Often a synonym, but some classifications use fuelwood more broadly to include wood fuels beyond logs and branches.
- Wood chips - Wood chips are small mechanically fragmented pieces, commonly handled as bulk fuel rather than individual logs or billets.
- Wood pellets - Wood pellets are densified manufactured fuel made from comminuted wood.
- Charcoal - Charcoal is a carbon-rich product of wood pyrolysis, whereas firewood retains the wood's uncarbonized structure.
- Treated waste wood - Preservatives, coatings or other contamination distinguish treated waste wood from ordinary untreated firewood and affect suitable combustion equipment and emissions.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of firewood this model covers, and on what evidence? provenance
What the second pass must settle
- Does an existing Vercy wood or wood-fuel model already own this concept, and how should firewood-specific content link to it without duplication?
- Where should the registry draw the boundary for kindling, bark-only fuel, logging residues and untreated recovered lumber designated for burning?
- Which moisture sampling methods and reporting conventions should the model adopt, and which readiness criteria must remain specific to an appliance or jurisdiction?
- Which recognised firewood quantity conventions, grading systems and conversion methods should be supported without implying universal equivalence?
- Which authoritative sources should support treatment, sourcing and movement assessments in the jurisdictions where this model will be used?