Seven guides that map who actually builds every HVAC brand, what every job should cost in 2026, and the word-for-word kitchen-table scripts that make contractors quote you straight — built from warranty certificates, federal records, and the paperwork nobody hands homeowners.
Get the Vault —None of these are exotic scams. They're the standard economics of the home climate business — visible the moment someone shows you where to look.
| $3,500–5,000 | The unexplained layer inside a typical $9,000 changeout quote — overhead and margin, packaged as one number so you can't see it | GUIDE 03 TAKES IT APART |
| $800–2,000 | Typical premium for a Carrier badge over the identical Bryant unit — one of a dozen twin pairs most buyers never hear about | GUIDE 01 MAPS EVERY TWIN |
| $400 | Flat-rate book price for replacing the $8–45 capacitor behind most summer AC failures | GUIDE 06 SHOWS THE WATCH |
| 10 → 5 yrs | What happens to the parts warranty when nobody registers it inside the 60–90 day window — and most homeowners are never told there is one | GUIDE 05 RUNS THE CLOCK |
| 20–40% | How far rule-of-thumb sizing oversizes the average home — thousands up front for a system that dehumidifies worse and dies younger | GUIDE 04, SCRIPT 01 |
| 15–30% | The surcharge for buying in a July heat wave instead of the shoulder season — same job, same crew, different month | GUIDE 06'S CALENDAR |
Each guide stands alone; together they cover the full life of every machine that heats, cools, or dries your house — from the showroom to the year-ten repair decision.
Thirty-plus HVAC badges, five corporations. Who actually builds every brand, the badge premiums in dollars, and the verdict on which name to buy in every family.
The only equipment worth buying in every class — AC, furnace, heat pump by climate, water heater, mini-split, window unit, dehumidifier, filter, thermostat — with the trap on every pick.
The anatomy of a $9,000 number, the 2026 fair-price bands for sixteen jobs, and the one written demand that reprices any quote.
Twelve questions, word for word: three on the phone before a truck rolls, four before you sign an install, five when a tech says "replace" — with what good and bad answers sound like.
The registration clock by brand, the carve-outs written into the actual certificates, the claim sequence, and how to fight a denial with paper.
The buying calendar that moves every purchase to its cheapest month, the $25 routine that replaces the $200 tune-up, and the repair-or-replace math, settled with rules.
The tool layer: everything the first six guides reference, built for the kitchen table and the clipboard.
Coil Exposed exists because the home climate market runs on information the homeowner doesn't have — and I got tired of watching good people pay for that gap.
Every claim in these seven guides came out of the same research that goes into the channel: manufacturer warranty certificates read line by line, the AHRI directory, federal recall and enforcement records, national-laboratory field studies, and the paperwork contractors would rather summarize than show. When something couldn't be verified, it didn't go in — and where a number needs your local market to finish it, the guide says so and hands you the worksheet.
One thing you'll never find here: sponsor money. No brand paid to be in the Vault, and no brand can pay to be out of it — which is why several pages tell you not to buy anything at all. Questions, corrections, or a quote you want a second set of eyes on: primerundown@gmail.com.
Both ends and everything between: buying (Guides 01–03), every contractor conversation including condemnations and second opinions (Guide 04), warranty claims (Guide 05), and the maintain-repair-replace decisions across ten years of ownership (Guide 06).
All the majors — the Carrier, Trane, Daikin/Goodman, Rheem, and Lennox families, the ICP and builder-grade layers, the inverter imports, and the badge-wall window/dehumidifier layer. The Badge Map exists precisely so no brand on a quote is a stranger.
The warranty registration clock (Guide 05) may be the single most valuable page in the vault for you — check it this week. After that: the maintenance routine, the failure watches, and the scripts for every service visit between now and replacement day.
Seven PDFs, 75+ pages, six printable worksheets, delivered instantly. Read them on anything; print freely for your own household.
Email within 30 days and you get a straight refund. Keep the files — arguing over $29.99 would contradict every page of Guide 03.
This is the 2026–2027 edition. Price bands and sourcing shift, which is why every table teaches the verification behind it — and corrections and edition updates ship free to every buyer.
One badge-twin quote, one registration deadline caught, one $400 capacitor call recognized for the $30 part it is — any single page of this vault out-earns its price the first time you use it. At the launch price — $49.99 $29.99 — it only has to be right once.
All seven guides are $49.99 $29.99 — instant download, 30-day money-back guarantee, keep the files. One wrong call at the kitchen table costs thousands; this is the cheap way to avoid it.