The Permit Paper Tells You Who Did the Job: What to Ask an Installer to Put in Writing

Most of the decision about a home system happens before the crew arrives. The estimate, the pitch, and the total all get weighed then. The thing you will hold for years is the paper the job leaves behind. This walk-through shows you how to judge an installer by that paper and how to compare installers on the same terms.

Start with the paper you should receive

Ask every installer, before you sign, what they will give you at the end of the job. Ask for the permit number and the name on the permit. Ask who pulled it, since that depends on the rules where you live. Ask whether an inspection is required, who schedules it, and what happens if it does not pass.

Ask for the inspection result in writing, not only a verbal pass. Ask for the model and serial number of every piece of equipment and the date the work was finished, written on a page you keep. That record is what any later age question will depend on.

Read the model line, not the brochure

Check that the model named on the estimate is the model that went in. Compare the model number on the quote with the label on the equipment. If the two do not match, ask why in writing before you accept the closeout.

Compare bids on the same paper

When you set two estimates side by side, look past the total. Check that both name the same equipment, the same scope of work, the same permit handling, and the same inspection steps. If one bid leaves out the permit or the inspection, its lower total is not yet a like-for-like number.

Questions to put to each installer

Who pulls the permit, and who keeps the copy? Who calls for the inspection, and what happens if it fails? Will the closeout list the model and serial numbers for every piece? Who do you call about paperwork after the crew is gone? A clear answer to each question tells you how the job will be documented. A vague answer means you should ask again in writing.

Use the published life as a planning input

Once you have the install date from the closeout, you can turn it into a planning date. The central air conditioner page on this site shows the typical service life and how to plan from an install year. Use it as a planning input, not as a forecast for any single unit.

Central Air Conditioner: typical service life and when to plan

Keep the closeout with your other home papers. You will need it the day you call about a repair or start planning the next replacement.