Verified weekly · widest price spread across listed retailers
Where retailer prices diverge most
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Brands in the catalog
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The four layers
A catalog, a network, a verifier, a builder
Each layer assumes the layer beneath it. The catalog is the foundation. The system builder composes from it. The verifier gates publish on every layer. The price layer surfaces freshly-checked retailer data.
Air compressors
Every class — reciprocating, rotary screw, scroll, rotary vane, centrifugal, breathing-air, marine, DC-portable. Spec sheets, component breakdowns, maintenance schedules, retailer prices, and source citations for each entry.
Air dryers
Refrigerated cycling, refrigerated non-cycling, desiccant heatless / heated / blower-purge, membrane, deliquescent — typed, sourced, sized.
Installer network
CAC level, services offered, service-area radius, brands authorized vs serviced, response time, technician count — installer profiles you can trust.
System builder
Compose a full compressed-air system — compressor + tank + dryer + filtration + drain + piping + controller — with server-enforced compatibility and shareable links.
Editorial guides
Long-form references on each compressor class — what it is, how it works, when to choose it, and how the catalog maps to real installations.
The promise
Every claim is cited. Every spec is verified. Every connection is real. The page is the product — as completely, as currently, and as clearly as the available sources allow.
Three rules
Why these pages stay useful
The catalog only earns its keep if the numbers on it are right today, not just on the day we wrote them. Three rules cover the rest.
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Sources
Every number traces back to where we got it.
Click any spec and you can see the manufacturer datasheet, the standards document, or the dealer listing it came from. If we can’t show the source, we don’t write the number.
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Freshness
Pages get checked again, on a schedule.
Models get revised. Prices move. Dealers drop products. We re-read every source on a regular cadence and update the page — or mark it stale if we can’t. You shouldn’t have to wonder whether a listing is from this year or three years ago.
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Independence
Nobody pays for a better spot.
Brands can’t buy placement. Installers can’t pay to rank higher. There are no sponsored “best of” badges. The order you see is the order that helps you decide.