⚠  IMPORTANT: These are allegations only. No court has ruled that any manufacturer engaged in price-fixing. This article is informational — not legal advice. Consult an attorney for advice specific to your situation.

A federal class-action lawsuit that could change the financial landscape for every HVAC contractor, distributor, and homeowner in America is currently moving through the US District Court for the Eastern District of Michigan. Filed on March 20, 2026, Berg v. Robert Bosch LLC et al. accuses seven of the largest HVAC equipment manufacturers in the United States — Trane, Carrier, Daikin, Bosch, Lennox, Rheem, and AAON — of conspiring to coordinate price increases since January 2020. Two additional lawsuits have since been filed, one specifically on behalf of contractors and distributors as direct purchasers of equipment.

The core allegation is simple and explosive: the manufacturers who control more than 90% of the US HVAC equipment market allegedly used secret meetings, information sharing, and public signalling to coordinate price increases — artificially inflating the cost of air conditioners, heat pumps, furnaces, rooftop units, and HVAC systems across the board. If the plaintiffs succeed, the result could be billions of dollars in settlements and rebates for contractors and consumers who purchased HVAC equipment between 2020 and 2026.

This article explains the lawsuit in plain English, what the key numbers mean, what the three cases actually allege, what the manufacturers say, and — most critically — what you should do right now to protect your interests regardless of how the litigation unfolds.

The Numbers That Explain Why People Are Paying Attention

The lawsuit's most powerful data point is the price comparison embedded in the complaint. From January 2020 through early 2026:

•       HVAC equipment prices rose approximately 53.5%

•       General consumer prices (CPI) rose approximately 29.7%

•       Other major appliances rose approximately 30.8% 

HVAC equipment prices rose almost twice as fast as general consumer prices and almost twice as fast as other comparable appliances. The complaint estimates an overcharge of approximately 8% above what prices would have been in a genuinely competitive market — totalling billions of dollars across affected purchasers over the six-year class period.

The defendants' explanation for the price increases — COVID-19 supply chain disruptions, the SEER2 efficiency standard transition, and the AIM Act refrigerant phasedown — are acknowledged in the complaint. But the plaintiff argues these factors do not explain the full magnitude of the increases. The allegation is not that prices went up. It is that prices went up more than they should have, because of coordination rather than competition.

The HVAC price-fixing lawsuit's core allegation: HVAC equipment prices rose 53.5% from January 2020 to early 2026 — nearly twice the 29.7% rise in general consumer prices and 30.8% rise in other major appliances — with the complaint estimating an 8% overcharge above competitive market pricing, totalling billions of dollars across contractors, distributors, and consumers who purchased HVAC equipment during the six-year class period.

The Three Lawsuits — Who Is Suing and Who They Represent

Lawsuit 1 — Berg v. Robert Bosch LLC (March 20, 2026): Filed on behalf of consumers and businesses that purchased HVAC equipment from 2020 to present. Plaintiff Alyssa Berg of Minnesota represents a proposed class of end users — homeowners and businesses who bought the equipment for their own use, not for resale. This is you if you bought an air conditioner, heat pump, furnace, or HVAC system since January 2020. 

Lawsuit 2 — Isom v. Trane Technologies et al. (April 20, 2026): Filed specifically on behalf of direct purchasers — HVAC contractors and distributors/wholesalers who bought equipment from the manufacturers for installation and resale. Plaintiff Richard Isom, owner of Air Tech Services in Manatee County, Florida, alleges: 'As a result of Defendants' conspiracy, Plaintiff paid artificially inflated prices for the equipment needed to operate his business.' This is the contractor-specific lawsuit. If you buy HVAC equipment from distributors and install it for customers, this case is filed on your behalf.

Lawsuit 3 — Safford's Heating Cooling and Refrigeration v. Robert Bosch LLC (April 23, 2026): A second direct purchaser lawsuit filed two days after the Isom case, advancing similar claims on behalf of contractors and distributors. Multiple plaintiff law firms pursuing similar cases is standard in antitrust litigation — it increases pressure on defendants and can lead to consolidation into a multi-district litigation (MDL).

What the Manufacturers Are Saying

Every defendant has denied the allegations. Their statements are worth reading carefully:

•       Carrier: "We deny the baseless allegations in this lawsuit and will fight it vigorously. Carrier embraces competition and operates lawfully and with integrity."

•       Trane: "We strongly dispute the allegations made in this lawsuit and intend to vigorously defend ourselves against these baseless claims. Trane remains committed to operating with integrity, complying with applicable laws and regulations, and providing value to our customers."

•       Rheem: "We are aware of the recent lawsuit filed against several HVAC equipment manufacturers, including Rheem. We deny the allegations in the complaint and look forward to defending ourselves through the legal process."

•       Bosch: Declined to comment on pending litigation.

•       Carrier, Daikin, Lennox: Did not reply to initial requests for comment.

The denials are firm and consistent. None of the defendants have acknowledged any wrongdoing, and the case is at an extremely early stage — no discovery has occurred, no court has ruled on the merits, and class certification has not been granted. The allegations may or may not be proven. The appropriate response is awareness and preparation — not assumption of guilt. 

The Baird Warning — What Happened After the Last Similar Lawsuit

One piece of analysis stands out for its potential implications: Baird Equity Research Industrial Distribution analysts warned that 'one potential risk stemming from the lawsuit is a muted equipment pricing environment if there is a chilling effect on OEM price increases. Historical precedent is mixed in similar cases. Following a 2014 wallboard lawsuit, there was a five-year period of flat industry pricing.'

This is the most important market consequence to understand. If the lawsuit creates even the appearance that coordinated pricing is being scrutinised, manufacturers may become more conservative in announcing price increases — particularly public signalling of upcoming increases that the complaint specifically identifies as a mechanism of alleged coordination. The practical effect for contractors: the pace of equipment price increases may slow regardless of how the case is ultimately resolved.

This is not guaranteed. It is a historical precedent from an analogous case. But it is worth factoring into how contractors think about equipment pricing trajectories over the next 12-24 months. 

What You Need to Do Right Now — Action by Action

If You Are a Contractor Who Bought HVAC Equipment Since 2020:

1.     Start documenting your equipment purchases now.

The most important thing any contractor can do right now — before any settlement is reached or class is certified — is to organise their purchase records. If a settlement eventually produces rebates for direct purchasers, proof of purchase will be required to make a claim. Every invoice from 2020 through the present for Trane, Carrier, Daikin, Bosch, Lennox, Rheem, or AAON equipment could be relevant. Gather them, organise them by year and manufacturer, and store them somewhere secure.

This costs you nothing now and could be worth thousands of dollars later. Contractors who purchased large volumes of equipment — commercial HVAC companies, new construction subcontractors, high-volume residential replacement companies — have the most potential exposure and the most to gain from organised documentation.

2.     Monitor the case — do not rely on being notified automatically.

In class action litigation, class members are eventually notified if a settlement is reached — but that notification can come years after filing and may go to an old address or email. Search for updates on Berg v. Robert Bosch LLC, Case No. 2:26-cv-10949, Eastern District of Michigan. You can track federal case developments at PACER (Public Access to Court Electronic Records) at pacer.gov. Set a reminder to check every 60-90 days.

3.     Consult an attorney if you purchased significant volumes.

For commercial HVAC contractors, distributors, or businesses that purchased very large volumes of equipment between 2020 and 2026, a brief consultation with a consumer protection or antitrust attorney is worth the time. Some plaintiff law firms are actively soliciting additional class members — you can contact the firms handling the cases to understand your options without cost. Do not make any decisions based on this article — this is informational only, not legal advice.

4.     Do not change your current equipment purchasing strategy.

The lawsuit does not change what equipment is available, what it costs today, or what your customers need. Continue buying from the brands and distributors you trust. If anything, the potential for a pricing chilling effect may mean future price increases slow — which would benefit contractors. Do not change distributor relationships or brand preferences based on lawsuit allegations that have not been proven.

5.     Prepare to answer customer questions.

Your residential and commercial customers are reading about this lawsuit. Some will ask about it when you give them a quote. Prepare a brief, honest response: the lawsuit has been filed, the manufacturers deny the allegations, nothing has been proven, and you are watching the case closely. You can also let customers know that if a settlement is reached, they may be entitled to a rebate as end purchasers of equipment — and you will share information as it becomes available. 

If You Are a Homeowner Who Bought HVAC Equipment Since 2020:

6.     Find and save your HVAC purchase receipts and invoices.

If you purchased a new air conditioner, heat pump, furnace, or HVAC system from any of the seven named manufacturers since January 2020, find the invoice or receipt and save it. The purchase amount, equipment brand, and date are what matter. Store the document digitally — email yourself a photo of the invoice.

7.     You do not need to do anything right now to be part of the class.

Class action lawsuits do not require you to actively join. If and when a class is certified and a settlement is reached, class members receive notice — typically by mail or email — explaining how to make a claim. Keep your address and contact information current with any accounts where you registered HVAC equipment, and watch for settlement notices.

8.     Monitor ACCA's Tariff Resource Center and The Hardwire News.

The most reliable way to stay updated on this case is through HVAC industry publications and the case docket. The Hardwire News will continue to cover material developments in the litigation as they occur. ACCA's resources for contractors also include guidance on the lawsuit and customer communication.

The three essential actions every HVAC contractor should take right now: (1) Organise and save all equipment purchase invoices from 2020 to present for every named manufacturer — Trane, Carrier, Daikin, Bosch, Lennox, Rheem, and AAON. (2) Monitor the case docket at PACER (Case No. 2:26-cv-10949, E.D. Michigan). (3) Consult an attorney if you purchased significant commercial volumes. These actions cost nothing and protect your ability to participate in any eventual settlement.

What This Case Is NOT

•       It is not a finding that manufacturers broke the law. The allegations have not been proven. The case is in its earliest stages.

•       It is not a reason to stop buying from named manufacturers. These companies make the equipment your customers need. Nothing about the lawsuit changes product availability or quality.

•       It is not a quick payday. Antitrust class action litigation typically takes years — the 2014 wallboard case referenced by Baird took multiple years to resolve. Do not make financial plans based on an anticipated settlement.

•       It is not a reason to panic. It is a reason to be organised, informed, and prepared.

Frequently Asked Questions

What exactly is the HVAC price-fixing lawsuit?

Berg v. Robert Bosch LLC is a federal class-action lawsuit filed March 20, 2026 in the US District Court for the Eastern District of Michigan alleging that Trane, Carrier, Daikin, Bosch, Lennox, Rheem, and AAON — who control more than 90% of the US HVAC market — coordinated price increases from January 2020 through today. Two additional lawsuits have been filed on behalf of direct purchasers (contractors and distributors). All allegations are denied by the manufacturers.

Am I automatically part of the lawsuit?

If you purchased HVAC equipment from any of the seven named manufacturers since January 2020, you are likely a potential class member under one of the three cases (end users under Berg, direct purchasers under Isom or Safford's). You do not need to actively join — if a class is certified and settlement reached, you will be notified and given an opportunity to make a claim. Keep your purchase documentation.

What should I do with my old equipment invoices?

Save every invoice from 2020 to present for Trane, Carrier, Daikin, Bosch, Lennox, Rheem, or AAON equipment purchases. Organise by year and manufacturer. Store digitally. These records may be required to make a claim in any eventual settlement. This is the single most important action you can take now.

Will this lawsuit lower HVAC equipment prices?

Possibly — indirectly. Baird Equity Research noted that following a similar 2014 wallboard antitrust lawsuit, the industry experienced five years of flat pricing as a chilling effect on coordinated price announcements. This is not guaranteed but represents a plausible market consequence if the lawsuit creates scrutiny around how manufacturers announce and coordinate price increases.

Where can I track updates on the case?

Search PACER (pacer.gov) for Case No. 2:26-cv-10949 in the Eastern District of Michigan to track docket updates. ACHR News, Contracting Business, and The Hardwire News will cover material developments as they occur. The plaintiff law firms — including Hagens Berman and Lock Law — also maintain case update pages.

Legal Disclaimer

This article is for informational purposes only and does not constitute legal advice. The allegations in Berg v. Robert Bosch LLC and related cases have not been proven, and no court has found that any manufacturer engaged in price-fixing or any other unlawful conduct. Consult a qualified attorney for advice specific to your situation.