New Install Punch List and Final Walkthrough

Purpose

An install crew cannot punch its own work. Not because anyone is dishonest, but because by hour nine the crew has stopped seeing the job, and the eye that set a strap is the eye least able to notice it is one hole off. Every open item that leaves a job unnamed comes back as a callback at the shop's cost, usually in the first cold week, with the customer's confidence already spent. This procedure puts a second person against the documents before the customer is invited to look, so what the customer sees is either finished or a dated commitment, never a surprise.

Scope

Covers the internal punch pass and the final acceptance walkthrough on a completed equipment install or changeout: residential split systems, packaged units, air handlers, furnaces, heat pumps and mini splits, plus their ductwork modifications, electrical, condensate and venting.

Does not cover customer education on operating the system, thermostat programming or filter schedule, which the equipment handover walkthrough SOP owns and which happens after acceptance. Does not cover the commissioning readings, which are captured by the startup procedure and are an input here, not a task.

Roles and responsibilities

Procedure

1. Verify the equipment installed is the equipment sold, before looking at workmanship. Compare model numbers on all pieces against the signed proposal and the permit. Acceptance: every model number matches, or a written substitution approval exists naming who approved it. What wrong looks like: a coil substituted for stock availability with nobody told, which reads as fine on the metal and wrong on the invoice, the rebate filing and the matched combination. Stop rule: an unapproved substitution stops the punch and goes to the service manager first, because a mismatch changes what the rest of the punch is checking against. Hazard: none at this step, it compares documents to rating plates.

2. Walk the mechanical set: level, support, clearance, isolation. Outdoor unit level across both axes on its pad, indoor unit supported per the manufacturer's instructions with a secondary pan where one is required, service clearances open on every side the instructions call for, vibration isolation intact rather than crushed by an over-tight strap. Acceptance: the outdoor unit within the manufacturer's stated level tolerance and, absent a stated figure, level on a torpedo level in both directions; service clearances measured with a tape, not estimated. What wrong looks like: a pad already settled toward the house, or a filter door that cannot open past a nearby duct. Stop rule: a clearance that blocks a serviceable component is a fix-now item, because the next tech will damage something working around it. Hazard in this step: rocking a set unit to test support puts fingers between cabinet and pad and can walk a unit onto a foot, so support is judged by sighting and by a level rather than by pushing the equipment.

3. Walk the airside: connections, sealing, insulation, and the return. Plenum connections mechanically fastened and sealed, flexible duct pulled tight and supported at the manufacturer's spacing rather than draped, insulation continuous, filter rack sealed so it does not draw from the space around it. Acceptance: no visible daylight or air movement at any joint with the blower running, filter accessible without a tool, and total external static pressure on the startup sheet below the maximum on the unit rating plate. What wrong looks like: a filter rack that whistles, which is unsealed return, and a static that came in near the plate maximum with a brand new filter, which will only rise. Stop rule: static at or above the plate maximum is not a punch item, it is a design problem, and it goes to the service manager before acceptance. Hazard in this step: this check is made with the blower running, so it is made from outside the cabinet, and hands never enter a blower housing to feel for leakage.

4. Walk the wet and the fuel side: condensate, gas, refrigerant joints. Trap correct for the cabinet, primary line pitched and supported, overflow provision present per the adopted IMC condensate section, gas piping supported with a sediment trap where required, connections leak checked with an approved leak detection solution or an electronic detector. Acceptance: a measured pour clears the drain and the water level device stops the equipment; no bubbles at any gas joint and no indication at any brazed joint. What wrong looks like: a drain that carries a slow pour and backs up on a full-load afternoon. Stop rule: any gas leak indication means the gas is shut off at the appliance valve, the joint repaired and re-tested, and the appliance is not left in service until it re-tests clean; never test with a flame. Hazard in this step: fuel gas is present at a fitting a hand is on, so the appliance stays off during the check and no ignition source is operated at the fitting, including a work light switch.

5. Walk the electrical: disconnect, conductor sizing, bonding, labeling. Disconnect within sight of the unit, conductors and overcurrent protection against the minimum circuit ampacity and maximum overcurrent device on the rating plate, whip secured, connections landed, panel directory updated. Acceptance: the installed overcurrent device equal to or below the plate maximum, and the conductor sized to the plate's minimum circuit ampacity. What wrong looks like: a breaker carried over from the old system that is larger than the new plate allows, which is the most common changeout defect and is invisible with the cover on. Stop rule: an oversized device is replaced before acceptance, not listed. Hazard in this step: the cover comes off, so the work is done by a qualified person under 29 CFR 1910.333(b)(2), de-energized where the check can be made dead, and where a live reading is required the meter is proved on a known live source before and after, per NFPA 70E-2021, 120.5.

6. Read the startup sheet against the plate, then walk the building. Compare temperature rise to the range on the furnace plate, superheat or subcool to the manufacturer's chart, amp draws to rated load amps. Then walk the crew's path: stair nose, door casings, carpet, landscaping, the pad area, and the attic or crawlspace access left closed and insulated. Acceptance: every startup value inside its published range, and the wide photo from the install record comparable to the space as it stands now. What wrong looks like: a value recorded as "OK" rather than as a number, which means nobody read it. Stop rule: a value outside range sends the job back to the crew before the customer is called. Hazard in this step: re-entering an attic or crawlspace carries the same joist-only movement and light-before-entry rule as the install.

7. Disposition every open item into one of three categories, in writing, before the customer is invited. Fix-now, scheduled with a date, or accepted as-is with the reason. Acceptance: every item carries a category, an owner and a date; zero items sit uncategorized. What wrong looks like: a list with "will take care of it" against three lines, which is the phrase that becomes a callback nobody scheduled. Stop rule: an item nobody will own does not get written as accepted; the service manager decides and signs. Hazard: none at this step, it is a decision made at a desk.

8. Walk the customer through the finished job and the dated list, and record their acceptance or exception. Show what was done, show the list, read the scheduled items and their dates aloud, and ask directly whether anything they expected is missing. Acceptance: a signed acknowledgement naming the open items and their dates, or a written exception in the customer's own words. What wrong looks like: a signature on a blank completion line, which records only that somebody signed something. Stop rule: a customer who raises an item not on the list stops the close-out; it is added, categorized and dated in front of them rather than settled verbally. What the shop actually banks here is a dated record that the customer was shown the open items; what that signature proves about acceptance or waiver is a legal question for the shop's own attorney and is not asserted on the form. Hazard: none at this step.

The record this produces

One punch record per install: the model comparison result, each walk category marked pass or carrying its items, every item categorized as fix-now, scheduled or accepted with an owner and a date, the startup values read against their published ranges, and the customer acknowledgement or exception with the item list attached.

Two readers matter later. The service manager, who counts items per crew per month and learns which defect repeats, which is the only way an install crew improves. And the tech dispatched on the first callback, who opens this record and learns in ten seconds whether the complaint is a known scheduled item or something new.

Worked pass: heat pump and air handler changeout, closet installation

Crew declared complete on a Thursday afternoon. A punch technician who had not worked the job arrived Friday morning with the photo set and startup sheet in hand.

Steps 1, 2 and 3 passed. Model numbers matched the proposal and the permit. Outdoor unit level in both directions, service clearance measured at the electrical side and open. Plenum connections sealed, flex supported, filter rack sealed, total external static 0.58 in w.c. against a plate maximum of 0.80 in w.c.

Step 4 produced one accepted item: the pour cleared and the water level device stopped the unit, but the secondary pan under the closet unit had no drain of its own and the install relied on the level device alone. That is one of the permitted provisions under the adopted IMC condensate section, so it was categorized accepted as-is with the reason written rather than silently left. Step 6 read 21 F temperature rise on auxiliary heat against the 15 to 25 F band on the rating plate, and 9 F subcooling against the 8 to 12 F band on the manufacturer's charging chart. Step 7 categorized two items: one fix-now already closed and one accepted with its reason. Step 8 walked the customer through both by name.

Step 5 FAILED. With the cover off and the circuit de-energized, the breaker serving the air handler was a 60 A device. The rating plate on the new air handler publishes a maximum overcurrent device of 45 A, so 60 minus 45 puts the installed device 15 A above what the plate allows, carried over from the old air handler and its larger strip heat package. Under this step's stop rule it is replaced before acceptance rather than listed, so the breaker was changed to 45 A that morning, the conductor confirmed against the plate's minimum circuit ampacity, and the directory corrected. The job's own photo record showed the panel with the old breaker in place, which is what let the office confirm it was carried over rather than newly installed.

What the failure teaches: four of the five walks passed and the crew was neither careless nor rushed. The defect was an omitted decision rather than an omitted action, and it lived behind a cover that nobody holding the install had any reason to open again.

References

• Manufacturer installation instructions and rating plate for level tolerance, service clearances, minimum circuit ampacity, maximum overcurrent device and temperature rise range
• IMC condensate disposal provisions, in the edition your jurisdiction has adopted, for the overflow provision accepted in step 4
• 29 CFR 1910.333(b)(2), electrical safe work practices for general industry branch circuit work, with NFPA 70E-2021, 120.5 for the proving sequence used in step 5
• NFPA 54 / ANSI Z223.1 National Fuel Gas Code, in the edition your jurisdiction has adopted, for gas connection leak check practice in step 4
• See related: Equipment Handover Walkthrough With the Customer; Job Photo and Reading Record on an Install; Callback Within 30 Days Investigation