# The Furnace Isn't Free

Author: Aziel Eliab
Person @id: https://www.azieleliab.com/#aziel
Canonical: https://furnaceisntfree.com/
Alias: https://www.furnaceisntfree.com/ (301 to the canonical host when the Worker is deployed)
Subject: HVAC quote transparency, free-furnace promotions, furnace installation cost, repair-or-replace questions.
This site does not name companies. It explains offer structure.
It does not publish industry-average prices. Illustrative dollars are labeled fictional.
It does not decide whether a furnace is safe.

## Pages
- https://furnaceisntfree.com/
- https://furnaceisntfree.com/how-the-offer-works/
- https://furnaceisntfree.com/the-numbers/
- https://furnaceisntfree.com/compare-quotes/
- https://furnaceisntfree.com/checklist/
- https://furnaceisntfree.com/repair-or-replace/
- https://furnaceisntfree.com/discount-reality-check/
- https://furnaceisntfree.com/evidence/
- https://furnaceisntfree.com/submit/
- https://furnaceisntfree.com/aziel/
- https://furnaceisntfree.com/about/
- https://furnaceisntfree.com/privacy/
- https://furnaceisntfree.com/terms/
- https://furnaceisntfree.com/editorial/
- https://furnaceisntfree.com/corrections/
- https://furnaceisntfree.com/stats/

## Calculator
Blank money inputs stay unknown. Explicit 0 is zero.
Net equipment after allowance = max(0, equipment price − allowance).
Excess allowance above the equipment price is shown separately and is not applied to labor.
Installation and additional = labor + materials/modifications + other required charges.
Incremental installed furnace cost = net equipment after allowance + installation and additional.
Labor-to-equipment ratio = labor ÷ equipment-only price only when equipment-only price > 0.
Package difference = package total − AC-only comparison price, and is not inferred from the other lines.
Fictional example (not a market average): equipment $1,500, allowance $1,500, labor $4,800, materials $900, other charges an explicit $0. Incremental installed furnace cost $5,700. Labor ratio 3.2× in that fiction only.

## Quote comparison
Up to three quotes. Missing fields are flagged. Contractors are not ranked.

## Receipts
POST /api/feedback stores a private usefulness receipt (yes/no, comment ≤ 256 characters, calculation snapshot, optional JPEG).
JPEG path accepts image/jpeg only, with user attestation that the file is a written invoice, estimate, or offer, plus a redaction confirmation.
The site does not OCR uploads.
Corpus forwarding is off until CORPUS_INGEST_URL and CORPUS_INGEST_TOKEN are set. This file does not claim a live corpus write.
GET /count and GET /v1/stats are the page-view counter.
GET /api/usefulness is the public meter. Comments and images are not in that response.

## Sister doors
Official cross-chain sister handles linked from /aziel. A link is not a deployment claim and not a catalog.
- https://www.azieleliab.com/
- https://azielcorpuslibrary.net/
- https://godlock.uk/
- https://hedidntjump.com/
- https://github.com/AzielEliab/aziel-runtime
- https://aziel-runtime.vibelock.workers.dev/
- https://timetounsealthebook.net/
- https://furnaceisntfree.com/

Indexing is requested. This document does not assert that any search engine has indexed the host.