HVAC · MECHANICAL AND LIFE SAFETY · FIXED BY STEP 07

Retention rides on a report you didn't write

Field work wrapped in April, and your last five percent is still waiting on a heating verification somebody has to schedule for cold weather.

WHY IT IS A HVAC PROBLEM

Other trades finish, get inspected, and clear retention on their own schedule. Your money is released by a document written by an agency you don't hire, don't schedule, and can't staff up, on a system that has to be tested in weather that may be six months away. Adding manpower does nothing, which is what makes this different from every other closeout problem on the job.

WHAT IT COSTS

The size of it

You wait 6 to 18 months past your last day of field work for 5 to 10 percent of contract value, and no amount of added labor buys you out of it.

OVERHEAD AT $1M–$5M

16%

CFOS target 15% for hvac.

GROSS MARGIN AT $1M–$5M

24%

CFOS target 26% for hvac.

NET PROFIT AT $1M–$5M

CFOS target 11% for hvac.

You're on site from underground condensate and roof curbs in month two through start-up, TAB, controls point-to-point, and commissioning in the final month, one of the longest spans of any trade on the job. The final release doesn't turn on your own work at all. Two third-party reports control it, one from the test and balance agency and one from the commissioning authority, and sometimes the owner hires both directly. The CxA writes issues, you correct them, and the CxA re-verifies whenever the next site visit happens. A lot of specs also require seasonal testing, and since you can't verify heating capacity in July, final acceptance waits for the opposite season.

WHAT TO DO

Three moves, in order

STEP 01

Before signing, get the TAB and Cx scope in writing: who hires them, when they mobilize, how re-verification gets scheduled, and what the spec says about seasonal testing.

STEP 02

Carry retention as its own receivable with an expected release month driven by the commissioning schedule, and put it on the rolling cash forecast so it stops being a surprise.

STEP 03

Ask for partial retention release at substantial completion on everything the Cx report doesn't gate, and leave only a seasonal testing holdback behind.

THE FIX

Step 07: Monthly cadence

Weekly bookkeeping, cost to complete, and one CEO report, on the same days every month.

CFOS-07 · CHAPTER 7

The monthly close that takes a contractor 5 hours

What this step changes, what it depends on, and how to tell it's installed.

BENCHMARKS

HVAC by revenue band

Every one of the 7 bands carries the CFOS target beside the published figure.

ACROSS EVERY TRADE

Profitable on the P&L, out of cash

Your P&L says you made money and your bank account says you didn't. Both are telling the truth.

SAME TRADE

What else costs hvac contractors money

HVAC · CFOS-01

Your biggest PO gets paid months before it can be billed

You wired the deposit in April, paid the balance in July, and in September the unit is still in a leased warehouse with nothing on the pay app to show for it.

HVAC · CFOS-04

You bid a price the factory never agreed to hold

You bid it in March, released it in June, and it ships in February at whatever the factory is charging in February.

HVAC · CFOS-03

A model nobody signs turns into shop burden nobody bid

The coil line isn't running, the plasma table is idle, the shop foreman is on payroll, and you're chasing the plumber and the sprinkler contractor for a signature.

HVAC · CFOS-04

Bid pounds and bought pounds are two different numbers

You bid 42,000 pounds of duct and the mill invoices add up to 51,000, and nobody in the building can tell you where the other 9,000 pounds went.

HVAC · CFOS-06

Temp heat on your units is a change order

They dried the building in, fired your rooftops in November, pulled drywall dust through the coils until March, and now they want a clean warranty at turnover.

SAME MECHANISM, OTHER TRADES

The same mechanism in other trades

CIVIL

Your retainage is waiting on 70 percent grass

You finished grading in month three and utilities in month six, and the last 5 to 10 percent of your contract sits behind a seed bed that has to hit 70 percent cover.

CONCRETE

Done in June, Retention Releases When the Building Opens

Footings, foundations, and slab-on-grade are the first real dollar volume on the site, so you bill most of your contract early and then wait on a building you left a year and a half ago.

DEMOLITION

Demo Goes First And Gets Its Retention Back Last

You work five weeks and wait twenty months for the money. Your retention rides the prime's substantial completion on a building you left before the foundation went in.

QUESTIONS

What hvac owners ask

How long can a gc hold retainage waiting on commissioning?

Field work wrapped in April, and your last five percent is still waiting on a heating verification somebody has to schedule for cold weather.

What does it cost?

You wait 6 to 18 months past your last day of field work for 5 to 10 percent of contract value, and no amount of added labor buys you out of it.

What do I do first?

Before signing, get the TAB and Cx scope in writing: who hires them, when they mobilize, how re-verification gets scheduled, and what the spec says about seasonal testing.

What are hvac contractors supposed to be making?

HVAC runs 24% gross margin, 16% overhead and 8% net profit before taxes at $1M–$5M. The all-trade average is 7%, so this trade sits 1 points above it. The CFOS target is 11%.

Which part of the system fixes it?

The step is number 07, monthly cadence. Weekly bookkeeping, cost to complete, and one CEO report, on the same days every month. It comes from chapter 7 of CONTROL: The Construction Financial Operating System.

AUTHOR

JOSH LUEBKER

MASTER ELECTRICIAN · 150+ PROJECTS · $2.1B+ MANAGED

Josh Luebker ran commercial construction projects before he ran the numbers behind them, on data centres, military bases, hospitals, and high-rises. He wrote CONTROL: The Construction Financial Operating System, which is an eight-step framework for commercial subcontractors, and it publishes on October 1, 2026. He is a master electrician who moved into the office and kept the field vocabulary.

Sulphur Prairie Operations LLC maintains the benchmark reference behind these figures. Every edition is reconciled against the newest CFMA survey release before it publishes here. Where a figure changes between editions, the older edition keeps its year in the title so a citation to it stays correct.