US Homeowner AC Library 2026: replace, maintain and fix your home cooling

Every Claude AC guide for US homes in one purchase: replace without overpaying, maintain and troubleshoot, fix a hot second floor, get warranty and insurance claims paid, and cool single rooms.

  • 5guides in one purchase
  • 54chapters
  • 97worksheets and tables
  • 55official sources cited
  • $56saved vs $145 one by one

Checked before every release

  • 54automated testsrun at every release: prices, links, pages and data checked before publication.
  • 55primary sourcesevery rule and number linked to the official text, for you to open.
  • October 23, 2026editionrules and numbers checked on this date, updated when a text changes.

Built from the texts and data of ENERGY STAR, EPA, IRS, FTC, U.S. Department of Energy, Code of Federal Regulations.

In pictures

Split heat pump outdoor unit on a pad beside a house
Split heat pump outdoor unit on a pad beside a house. Photo: Tony Webster, CC BY 4.0, via Wikimedia Commons
Two central air conditioning condensers beside a home
Two central air conditioning condensers beside a home. Photo: Raysonho @ Open Grid Scheduler / Grid Engine, CC0, via Wikimedia Commons
Window air conditioner fitted in a sash window, seen from inside
Window air conditioner fitted in a sash window, seen from inside. Photo: No machine-readable author provided. Stilfehler assumed (based on copyright claims), public domain, via Wikimedia Commons
Insulation being fitted between the rafters of an attic
Insulation being fitted between the rafters of an attic. Photo: The EnergySmart Academy, CC0, via Wikimedia Commons
Outdoor unit opened up with gauges connected during a service visit
Outdoor unit opened up with gauges connected during a service visit. Photo: ArnoldReinhold, CC BY-SA 4.0, via Wikimedia Commons
Thermostat reading 86 °F during a summer drought
Thermostat reading 86 °F during a summer drought. Photo: B137, CC0, via Wikimedia Commons

Illustrative photos, published by their authors under free licences.

Who it is for

  • US homeowners with a central AC, a heat pump or a mini-split who want the whole picture: what to do now, how to keep it running, who pays when it fails and how to replace it well when the time comes.
  • Owners of a two-story house where the upstairs runs hot, and who are also weighing a repair against a replacement.
  • Households that also cool a bedroom, a rental unit or an addition with a window, portable or wall unit.

What it is not: tax, legal, engineering or financial advice; it recommends no brand, contractor or maintenance plan.

Best value

$89

5 guides for $89 instead of $145 one by one, $17.80 per guide

Get the library, $89

Bought one by one, the 5 guides cost $145; together they cost $89, paid once, instant access to all 5.

As described, or refunded in full · written into our terms of sale

Secure checkout by Stripe (card, Apple Pay, Google Pay), one-time payment with no subscription, instant access. Refund policy

Read the first chapter of each guide, free

Frequently asked questions

What exactly do I get?

Access to the 5 guides listed above, each on its own page with its spreadsheets, as soon as you have paid. Bookmark the library page: it links to all of them and always shows the latest versions.

I already bought one of the guides. Should I buy the library?

No: buy the guides you do not have separately. The library is for a first purchase of all of them.

Is it a subscription?

No. $89 is the total you pay, once, charged in US dollars. Nothing is charged later.

All printable guides and packs

$89 is the total you pay, charged in US dollars: nothing is added at checkout. Payment by Stripe; your statement shows “CLAUDE AC”. See our terms of sale, which include our refund policy. Access is immediate after payment. Claude AC is an information publisher; the guide is not legal, engineering or financial advice.