As of 10 November 2026, Heat and Air Handbook has published no corrections. When we get something wrong, we fix the page and record the fix here, with the date, the page and what changed. Found an error? Here is how to report it.
General information, not professional advice. Your system’s maker, your manual and a qualified technician decide what’s safe for your equipment, and local codes decide what needs a permit or a licensed installer. If you smell gas, leave the house now and call 911 or your gas utility from outside.
An empty log does not mean our pages are free of mistakes. It means no error has been corrected yet. Federal efficiency and refrigerant rules, makers’ manuals and energy prices change. Each page gets a fact-check against its sources, as our editorial policy explains, but no check catches everything.
Corrections log
No corrections have been published.
What counts as a correction
A correction is a change to something a page got wrong, such as a federal minimum, a date a rule applies from, a refrigerant rule, a code meaning, which brand or board a code belongs to, a step or its order, a safety stop, a maker’s document number or edition, a citation, a read date, an energy price, a sum or a tool result. It also covers a page that stayed unchanged after its source moved on, leaving a reader with an out-of-date rule or step.
Routine work is not logged here. That means fixing a typo or a broken link, adding a new section, a newly confirmed brand’s codes or a newer energy price, or our scheduled rechecks, as our how we check page describes. A page shows an updated date only when its content really changed.
How we correct an error
- We check the claim against its source, such as the regulation in the eCFR, the Federal Register, the agency’s own page or the maker’s document, and rework any sum it affects.
- If the page is wrong, we fix it, along with any other page, table, graphic or tool that uses the same rule, step or figure, and show the new updated date. A wrong safety step, a missing stop or a wrong code meaning is fixed first.
- We add an entry to the log above with the date, a link to the page, what it said and what it says now.
If the source does not settle the question, we remove the claim or say plainly that it is not confirmed. If the source supports the page as written, the page stays as it is. Advertisers have no say over what we publish, so a report from a maker, a contractor, a parts seller or an advertiser is checked the same way as any other.
How to report an error
Use our contact page or email contact@heatandairhandbook.com, and include:
- the address of the page
- the sentence, rule, code meaning, step, figure or tool result you think is wrong
- a link to the regulation, agency page or maker document (with its number and edition) that shows the right answer, if you have one
Please leave out details of your own system, and don’t send photos, serial numbers or quotes. We can’t diagnose a system, read codes for a reader or recommend contractors. Our pages are general information, as our disclaimer sets out. Check the label and manual for your own unit, and ask a qualified technician, before you rely on a step.