# Who does Comfort Systems USA, Inc. pay? Who are its key suppliers?
Canonical: https://valuechain.wiki/comfort-systems-usa · Facet: suppliers · Updated: 2026-09-11T22:22:20.940695+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: Comfort Systems USA, Inc.'s confirmed suppliers/cost counterparties include Trane Technologies, Carrier Global. Per the valuechain.wiki graph: 2 cost edges, backed by 2 dated sources, 1 of them primary filings (as of 2026-09-11).

### Feyen Zylstra (high)
- metric: Contract value $110M · transaction completed 2025-10-01 · Preliminary total purchase price for Feyen-Zylstra Holdings
- note: Comfort Systems USA acquired Feyen Zylstra in October 2025, adding electrical design, installation, and maintenance capabilities for industrial, technology, and healthcare customers. The SEC filing reports a preliminary total purchase price of $109.8 million.
- [confirms] SEC EDGAR (EN, filing, published 2026-02-19) https://www.sec.gov/Archives/edgar/data/1035983/000110465926017530/fix-20251231x10k.htm: "preliminary purchase price of $109.8 million"
- [confirms] EdgePoint (EN, research, published 2025-12-21) https://edgepoint.com/wp-content/uploads/2025/12/Commercial-Facility-Services-Flash-Report-December-2025.pdf: "Oct-25 Feyen Zylstra ... Comfort Systems USA"
- [confirms] Comfort Systems USA (EN, ir, published 2025-10-23) https://investors.comfortsystemsusa.com/news-releases/news-release-details/comfort-systems-usa-reports-third-quarter-2025-results: "On October 1, we acquired Feyen Zylstra"

### 트레인 테크놀로지스 (high)  → /trane-technologies.md
- note: Trane is a principal manufacturer of chillers and rooftop HVAC units installed by Comfort Systems USA in commercial MEP systems. The Southwest operation separately confirmed a strategic partnership with Trane, but purchase value was not disclosed.
- [confirms] SEC EDGAR (EN, filing, published 2026-02-19) https://www.sec.gov/Archives/edgar/data/1035983/000110465926017530/fix-20251231x10k.htm: "primary manufacturers ... Trane"
- [confirms] Comfort Systems USA Southwest (EN, ir, published 2021-11-18) https://www.omniapartners.com/suppliers-files/A-D/Comfort_Systems_USA/Contract_Documents/02-127/Comfort_Systems_Response.pdf: "We have a Strategic Partnership with Trane"

### 캐리어 글로벌 (high)  → /carrier-global.md
- note: Carrier is a principal manufacturer of chillers and rooftop HVAC units used by Comfort Systems USA in commercial MEP systems. Supplier-specific purchase value and contract terms were not disclosed.
- [confirms] SEC EDGAR (EN, filing, published 2026-02-19) https://www.sec.gov/Archives/edgar/data/1035983/000110465926017530/fix-20251231x10k.htm: "primary manufacturers ... Carrier"

Reverse side: https://valuechain.wiki/comfort-systems-usa/customers.md · Ripple: https://valuechain.wiki/comfort-systems-usa/ripple.md

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