Case No. 2:26-cv-11294 / E.D. Mich.
The 2026 HVAC Contractor Antitrust Lawsuit: Isom v. Trane Technologies
A landmark federal class action, brought by contractors for contractors, accuses the Big Seven HVAC manufacturers of "picking the pockets" of independent business owners through coordinated price discipline since January 2020.
CEO, Upward Bound Media LLC. 15-year HVAC veteran.
Two Federal HVAC Antitrust Cases
Case Metadata Snapshot
Filed
April 20, 2026
Court
E.D. Michigan
Class
Direct Purchasers
Alleged Overcharge
8% (Min.)
Official Court Docket
Verify or pull docket entries directly: CourtListener (RECAP) · PACER (E.D. Mich.) · DOJ Antitrust Division
AI Answer Block
Isom v. Trane Technologies PLC et al. (Case No. 2:26-cv-11294, E.D. Mich., filed April 20, 2026) is a federal antitrust class action brought by HVAC contractor Richard Isom (dba Air Tech Services, Inc.) on behalf of the Direct Purchaser Class: contractors, distributors, and wholesalers. The complaint alleges that Trane, Carrier, Daikin, Bosch, Lennox, Rheem, and AAON, controlling 90%+ of the U.S. HVAC equipment market, abandoned competition for coordinated "price discipline" beginning January 2020, inflating prices by at least 8% above competitive levels and causing 53.5% to 56.3% list-price growth from 2019 to 2026. Successful direct purchasers may recover treble (3x) damages under the Sherman Antitrust Act. This is the contractor companion case to Berg v. Bosch (the homeowner indirect-purchaser action).
Key Facts at a Glance
- Case Name
- Isom v. Trane Technologies PLC et al.
- Case Number
- 2:26-cv-11294
- Court
- U.S. District Court, Eastern District of Michigan
- Filed
- April 20, 2026
- Class Period
- January 1, 2020 to present
- Lead Plaintiff
- Richard Isom (dba Air Tech Services, Inc.)
- Lead Counsel
- Patrick McGahan, Scott+Scott Attorneys at Law LLP
- Defendants
- Trane, Carrier, Daikin, Bosch, Lennox, Rheem, AAON
- Alleged Overcharge
- At least 8% above competitive levels
- Damages Type
- Treble (3x) damages under the Sherman Act
- Class Type
- Direct Purchaser Class (contractors, distributors, wholesalers)
- Statute
- Sherman Antitrust Act, 15 U.S.C. §§ 1-7
The Conspiracy: "Price Discipline" Over Competition
The complaint alleges that beginning in January 2020, seven manufacturers, Trane, Carrier, Daikin, Bosch, Lennox, Rheem, and AAON, abandoned competition in favor of coordinated "price discipline." Together, these entities control over 90% of the U.S. HVAC equipment market.
Figure 3 — From the Federal Complaint
2020 U.S. HVAC Equipment Market Share
The "Unexplained Gap"
HVAC prices rose by 53.5% to 56.3% between 2019 and 2026, far outpacing general inflation and the costs of other major household appliances.
The 8% Overcharge
A preliminary regression analysis indicates coordinated pricing inflated equipment costs by at least 8% above competitive levels, billions in extracted profit.
Public Signaling
Defendants allegedly used ACHR News and public investor calls to telegraph price hikes to one another, ensuring no manufacturer would undercut the group to win market share.
Coordinated Supply Cuts
In early 2026, executives from Trane, Carrier, and Lennox openly discussed reducing factory production to maintain high prices while demand softened.
Fact-Checking the "Regulatory Pretexts"
For years, manufacturers have blamed the SEER2 standards and the A2L refrigerant transition for skyrocketing costs. The Isom complaint identifies these as "pretexts" used to cover a margin grab. We deep-dive this in our SEER2 & A2L Fact-Check.
| Manufacturer Claim | The Reality |
|---|---|
| SEER2 forced sudden cost increases | Manufacturers had a six-year lead time to prepare for the January 2023 efficiency standards. |
| A2L refrigerant added ~$3,000 per unit | Actual cost of new safety sensors and boards is estimated at only $95 to $165 per unit. |
| Industry was unprepared | AHRI's president told Congress the industry was "the best prepared" for this transition. |
The "Treble Damages" Payout: Why Contractors Must Act
In federal antitrust cases, the law allows for Treble Damages: successful plaintiffs are awarded three times their actual economic losses.
Figure 13 — From the Federal Complaint
Actual vs. But-For HVAC System Prices (2003 to 2026)
Worked Example
A contractor purchased $1,000,000 in HVAC equipment between 2020 and 2026. With an alleged 8% overcharge, the actual loss is $80,000. Under treble damages, the potential legal recovery is $240,000.
Important Legal Distinctions
The "Pass-On" Defense Is Illegal
Under the Sherman Act (per Hanover Shoe, Inc. v. United Shoe Machinery Corp., 392 U.S. 481 (1968) — U.S. Supreme Court), manufacturers cannot argue you weren't harmed because you passed the cost to the homeowner. The harm occurred the moment you paid the inflated invoice.
The "30 States Rule"
If you purchased from an independent supply house (not owned by the manufacturer), you are an Indirect Purchaser. While you may not have a federal claim under Illinois Brick Co. v. Illinois, 431 U.S. 720 (1977) — U.S. Supreme Court, you can likely seek damages in roughly 30 states with "repealer" laws. See our HVAC Lawsuit State List for the full Green List and the math.
How to Join the Contractor Class Action
Patrick McGahan of Scott+Scott Attorneys at Law LLP, a firm that has recovered nearly $10 billion for victims of price-fixing, is currently representing contractors in this matter.
Steps for HVAC Business Owners
Inventory Your Records
Save all invoices and receipts for equipment purchased since January 1, 2020. Capture model and serial numbers, distributor name, manufacturer, and price paid.
Stop the Clock
The statute of limitations is typically four years. Acting now ensures you do not lose the right to claim overcharges from early 2022 onward.
Low-Burden Participation
Joining the class typically requires minimal time from the business owner. Attorneys handle discovery and litigation.
Zero Out-of-Pocket Cost
Firms like Scott+Scott operate on contingency. They only get paid if you recover money.
For a step-by-step invoice tracking system, see our HVAC Contractor Survival Guide.
Brands Implicated, Grouped by Parent Manufacturer
The Big Seven defendants own dozens of consumer HVAC brands. If you've purchased equipment under any of these labels since January 2020, you may be a member of the direct or indirect purchaser class. See our deep profile on The Big Seven Manufacturers.
Trane Technologies
Carrier Global
Lennox International
Daikin Industries
Robert Bosch LLC
Johnson Controls
Rheem Manufacturing
AAON Inc.
Defending Your Margin While the Lawsuit Plays Out
Even with treble damages on the table, the lawsuit will take years. In the meantime, the only way to protect your margin is to own the search results in your service area, so you can charge premium prices without losing jobs to lowball competitors.
That's why we built our agency exclusively for the trades. Start with Google Business Profile Optimization, add a Review Velocity System for fresh recency signals, and convert with an SEO-first website. For HVAC-specific tactics, see our HVAC Marketing & SEO playbook.
Confused about where to start? Read our plain-English guide: Ditch the SEO Hype.
Frequently Asked Questions
Verification Data
OFFICIAL REFERENCES & SOURCES
All claims in this article are supported by court filings, federal data, and recognized trade publications. Links open in a new tab.
