Reference tables
Look-up charts built from stable flue geometry and labeled industry planning conventions — flue size by fireplace opening (the signature data asset), liner size by appliance and standard clay-tile sizes, creosote stages 1–3, NFPA 211 inspection Levels 1–3, clearance-to-combustibles, and chimney repair / service cost bands by job.
Typical published planning values — NOT a certified spec or professional advice. The 1/10–1/12 flue rule, the 3-2-10 height rule, creosote stages, NFPA 211 inspection levels, clearances and cost bands vary by chimney and appliance; confirm your exact dimensions and follow the manufacturer’s instructions and local code. Creosote, chimney fire, carbon monoxide, structural and code judgement are a CSIA-certified sweep / licensed mason / NFPA 211 / local-code matter — have a certified professional inspect; never a step-by-step procedure or medical advice here.
Flue size by fireplace opening (the 1/10 rule)The signature reference: LABELED required round flue area & diameter and rectangular area by fireplace opening, with the nearest standard round liner / clay flue tile — 30×29 opening (870 in²) → 10" round / 12×12 tile.Liner size by appliance outlet & standard clay-tile sizesThe signature companion: LABELED recommended liner diameter by appliance outlet (a modern wood stove ≈ 6") plus the standard clay flue-tile nominal sizes and the openings they suit.Creosote buildup stages 1–3LABELED creosote buildup stages — Stage 1 loose soot, Stage 2 hard flaky, Stage 3 glazed tar-like (the highest chimney-fire risk) — with the cleaning effort each takes.NFPA 211 inspection Levels 1–3LABELED NFPA 211 inspection Levels — Level 1 routine visual, Level 2 with a camera on a sale or change, Level 3 opening concealed areas when a hazard is suspected.Typical clearance-to-combustiblesLABELED typical clearance-to-combustibles — a masonry chimney ~2" to interior framing, single-wall connector ~18", double-wall ~6" — confirm the listing and local code.Chimney repair & service cost bands by jobLABELED $ cost bands by job (sweep, inspection, crown, tuckpointing, reline, rebuild, cap) — a SANITY GUIDE only; you enter the real price.