Two businesses under one roof, reported as one number.
Installs and service have different margins, different labor, and different seasons. Most HVAC books add them together, which is why the answer is always "busy".
Where HVAC books stop being useful.
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Install and service in one bucket
A changeout carries equipment cost and thin margin. A service call carries almost no material and rich margin. Blended, you cannot tell who to hire next.
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Agreements booked as cash
A homeowner pays for two years of tune-ups today. You owe them service, so that money is a liability until the visits happen.
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Truck stock nobody counts
Parts thrown on the van get expensed on purchase and never reach a job. Across six trucks that is real money sitting in inventory.
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Callbacks charged to nothing
A tech goes back three times on a closed job. That labor lands in overhead, and the install looks better than it was.
Two businesses, reported as two businesses.
Two revenue streams with their own margin, labor efficiency, and contribution to overhead.
Maintenance money recognized as visits are delivered, so the balance sheet shows what you still owe in service.
Cash forecast through the shoulder seasons, and equipment timed against a good summer rather than a panic in December.
See what it would cost you.
Thirty minutes, a real price in writing, an honest answer on fit. Or send last year's return and I will review it free.