HARDI distributors — members of the Heating, Air-conditioning and Refrigeration Distributors International trade association — reported just a 1% year-over-year revenue decline in October 2025, with Days Sales Outstanding holding steady at 38 days. If the HVAC market had truly collapsed 50% as some headlines suggested, those numbers would look dramatically different.
The gap between what AHRI shipment data shows and what HARDI distributor revenue data shows is one of the most important and least-discussed dynamics in HVAC market analysis. Understanding both — and understanding why they diverge — gives contractors, distributors, and investors a much more accurate picture of where the market actually is versus where the headlines say it is.
What HARDI Data Is and Why It Matters
HARDI — the Heating, Air-conditioning and Refrigeration Distributors International — represents HVAC and refrigeration distributors across the United States and Canada. The organisation collects monthly revenue, margin, and operational data from member distributors and publishes aggregated benchmarking data that represents one of the most granular and current pictures of actual HVAC distribution economics available.
HARDI data differs from AHRI shipment data in a critical way: AHRI measures units shipped from manufacturers to distributors, while HARDI measures revenue generated by distributors from sales to contractors and end users. These two metrics measure different points in the supply chain and respond differently to inventory dynamics, pricing changes, and demand patterns.
HARDI member distributors reported approximately 1% year-over-year revenue decline in October 2025, with Days Sales Outstanding stable at 38 days — a far more moderate picture than AHRI shipment data alone suggests, reflecting the difference between factory-to-distributor volumes and distributor-to-contractor actual demand.
Breaking Down the October Numbers
The October 2025 HARDI data points deserve careful analysis:
• 1% revenue decline year-over-year: This is a very different story from the 15 to 20% decline that AHRI unit shipment data showed for the same period. The divergence reflects the inventory dynamics — distributors were shipping less to contractors from existing stock than factories were shipping to them, meaning distributor revenues held up better than factory revenues.
• DSO stable at 38 days: Days Sales Outstanding measures how long it takes distributors to collect payment from contractor customers. Stability at 38 days indicates that contractor credit quality remained healthy — contractors were paying their distributor invoices on time, suggesting that while their business was slower, they were not experiencing the cash flow crises that would manifest in rising DSO.
• Gross margin trends: HARDI data for the period showed gross margins holding relatively stable, indicating that distributors were not being forced to discount aggressively to move inventory — a positive indicator for the pricing environment at the distribution level.
The Gap Between Shipment Data and Distributor Revenue
The divergence between AHRI shipment data and HARDI revenue data is the most important analytical insight for anyone trying to understand the HVAC market in 2025 and 2026. Here is why they diverge:
AHRI tracks factory-to-distributor shipments. When distributors are destocking — working down elevated inventory to below-normal levels — factory shipments fall sharply even if actual contractor purchases from distributors remain relatively stable. The distributor is selling from existing stock without placing proportionate new factory orders.
HARDI tracks distributor-to-contractor sales. This is a closer measure of actual end-user demand. When a homeowner's system fails and a contractor orders a replacement unit from a distributor, that transaction is captured in HARDI data regardless of whether the distributor sourced the unit from new factory stock or existing inventory.
The practical implication: AHRI data overstates the severity of demand weakness during destocking periods, and HARDI data provides a more accurate picture of actual contractor and consumer demand. A market analyst who looks only at AHRI shipment data in 2025 would conclude the HVAC market was in freefall. A market analyst who also looks at HARDI revenue data would conclude the market was soft but not collapsing.
What DSO Stability Signals
Days Sales Outstanding is one of the most reliable leading indicators of financial stress in the contractor community. When contractors begin struggling financially — whether from slow revenue, rising costs, or cash flow problems — the first visible signal is typically slower payment to suppliers. DSO rises as invoices age beyond their payment terms.
The stability of DSO at 38 days through October 2025 signals several things simultaneously:
• Contractor financial health was holding: Despite slower business, contractors were managing their cash flow effectively enough to maintain payment discipline with distributors.
• Credit exposure was manageable: Distributors were not accumulating the delinquent receivables that would indicate imminent contractor failures or credit losses.
• The correction was orderly, not chaotic: A disorderly market correction — where contractors are failing, credit is tightening, and cash is scarce — would show in rising DSO before it shows in other metrics. The DSO stability through late 2025 suggests the correction, while real, was following a manageable trajectory.
How to Use HARDI Data for Business Planning
For HVAC business owners and distributors who want to use data to make better decisions, HARDI membership provides access to the full benchmarking dataset — including revenue by product category, gross margin benchmarks by company size and geography, DSO comparisons, and inventory turnover metrics.
Even without HARDI membership, the publicly reported aggregate data provides useful signals. Contractors who follow HARDI's monthly data releases alongside AHRI shipment data get a much more complete picture of market conditions than those who rely on either source alone.
Frequently Asked Questions
What is HARDI in the HVAC industry?
HARDI — the Heating, Air-conditioning and Refrigeration Distributors International — is a trade association representing HVAC and refrigeration distributors in the US and Canada. It collects and publishes aggregated financial and operational benchmarking data from member distributors, providing one of the most current and granular measures of actual HVAC distribution economics.
Why does HARDI data differ from AHRI shipment data?
AHRI tracks factory-to-distributor unit shipments, while HARDI tracks distributor-to-contractor revenue. During distributor destocking periods, AHRI data falls sharply as distributors reduce factory orders while selling from existing inventory, while HARDI revenue data remains more stable because contractor purchases continue from existing stock.
What does Days Sales Outstanding mean for HVAC distributors?
Days Sales Outstanding (DSO) measures how long it takes a distributor to collect payment from contractor customers. Stable DSO indicates healthy contractor financial conditions and payment discipline. Rising DSO is an early warning signal of contractor financial stress and potential credit losses.
Is the HVAC distributor market healthy in 2026?
HARDI data through late 2025 showed only a 1% revenue decline with stable DSO at 38 days — indicating that while the distribution market was soft, it was not experiencing the severe deterioration that AHRI factory shipment data alone might suggest. The distributor market entered 2026 in relatively stable financial condition.