---
title: "Comfort Systems USA: Business Model"
description: "Comfort Systems USA revenue by product line from its fiscal 2025 Form 10-K, with each part's share, growth and profitability explained."
canonical: https://www.getswoopr.com/stocks/companies/comfort-systems-usa/business-model/
source: "Swoopr Investment: https://www.getswoopr.com"
---

# Comfort Systems USA: Business Model & Revenue Engine



## Direct Answer

Comfort Systems USA reports revenue across 2 product and service lines in its fiscal 2025 Form 10-K. Mechanical is the largest, with $6.7 billion of revenue (73% of the total), followed by Electrical at $2.4 billion (27%).

## How Does Comfort Systems USA Make Money?

Mechanical supplies 73% of revenue, so Comfort Systems USA's results move mostly with that one business; the others matter more for diversification than for the headline number. Between fiscal 2024 and 2025, Electrical grew fastest (+61.9%) and Mechanical slowest (+20.7%), so the revenue mix tilts toward Electrical while that gap lasts.

| Product or service | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
| --- | --- | --- | --- | --- |
| Mechanical | $6.7 billion | $5.5 billion | 73.3% | 20.7% |
| Electrical | $2.4 billion | $1.5 billion | 26.7% | 61.9% |

![Bar chart of Comfort Systems USA revenue by product line for fiscal 2025: Mechanical 73.3%, Electrical 26.7%.](https://www.getswoopr.com/images/charts/comfort-systems-usa-business-model-segment-mix.webp)
*Comfort Systems USA revenue by product line as a share of total revenue, from the table above. The largest is highlighted. Select the chart to open it full size.*

## What the Segment Figures Do Not Show

The rows above add up to 100% of Comfort Systems USA's reported revenue for fiscal 2025; the difference is intersegment eliminations, corporate revenue or items the company reports outside its segments. Segment definitions are management's choice and change when a company reorganizes, in which case it restates prior years in the next filing, so a multi-year comparison should use the figures from a single filing. Revenue shows where sales come from, not where profit or cash is earned: a small segment can carry most of the margin.

## Where These Numbers Come From

Every figure on this page is a value Comfort Systems USA reported in the segment note and revenue disclosures of its Form 10-K filed February 19, 2026 (accession 0001104659-26-017530), read from the SEC's Financial Statement Data Sets. The prior-year column is the comparative figure from that same filing, so it reflects any restatement for a change in segments. Category names are the company's own XBRL labels, lightly reformatted for reading.

Rows that only total other rows (for example a "Products" line beside the individual products) are left out so nothing is counted twice. This page is educational and describes reported history for fiscal 2025; it is not a forecast or a recommendation.

## Frequently Asked Questions

### What are Comfort Systems USA's main products and services?

In its fiscal 2025 Form 10-K, Comfort Systems USA reports revenue for Mechanical and Electrical.

### Which part of Comfort Systems USA brings in the most revenue?

Mechanical, with $6.7 billion of revenue in fiscal 2025, or 73% of the total.

### Where does Comfort Systems USA report its segment results?

In the segment note to the financial statements in its Form 10-K, most recently filed February 19, 2026, alongside management's discussion of each segment's results.

## References

- [SEC EDGAR: COMFORT SYSTEMS USA INC Form 10-K filed February 19, 2026](https://www.sec.gov/Archives/edgar/data/1035983/000110465926017530/fix-20251231x10k.htm)
- [SEC EDGAR: COMFORT SYSTEMS USA INC annual and quarterly filings](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1035983&type=10-K)
- [SEC: EDGAR application programming interfaces (XBRL frames and submissions data)](https://www.sec.gov/search-filings/edgar-application-programming-interfaces)
- [SEC: Financial Statement Data Sets](https://www.sec.gov/data-research/sec-markets-data/financial-statement-data-sets)

## Related Pages

- [Comfort Systems USA company dossier](https://www.getswoopr.com/stocks/companies/comfort-systems-usa/)
- [Comfort Systems USA financial metrics](https://www.getswoopr.com/stocks/companies/comfort-systems-usa/metrics/)
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- [Comfort Systems USA peer comparison](https://www.getswoopr.com/stocks/companies/comfort-systems-usa/competitors/)
- [Comfort Systems USA business model and revenue mix](https://www.getswoopr.com/stocks/companies/comfort-systems-usa/business-model/)
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