HVAC Equipment Price Seasonal Increase: April vs July

The HVAC equipment price seasonal increase is real, but it is not where most shops think it is. At the factory gate, the producer price index for unitary air conditioners does almost all of its annual moving between January and June, then flattens or gives some back for the rest of the year. April to July, the months you feel the most, the index barely moves at all. So if your April condenser and your July condenser came off the same model number at different money, most of that difference was created after the equipment left the plant, somewhere between the manufacturer’s price list and your invoice.

That is the useful version of this post. The rest of it is the evidence, the list of places the summer premium actually gets added, and a method for checking whether the pattern holds on your own invoices instead of on a national index.

If you have never sat down and pulled a single model number across twelve months of purchases, start with what material price creep actually is first. The seasonal question is a special case of that one, and the method is the same.

What the equipment index actually does across a year

Use the product series rather than the industry one. BLS publishes a commodity index for unitary air-conditioners, except air source heat pumps (WPU114802), running monthly since December 1977, and that is a condenser and air handler, not a whole industry’s output. It is not seasonally adjusted, which is exactly what you want here: any seasonal shape in the numbers is still in them. One quirk to know before you cite it in an email: WPU114802 publishes about a month behind most PPI series, so the newest reading available is May 2026 while other series already show June. If you install heat pumps, run heat pumps (WPU11480734) instead; it is a separate and much flatter series.

Here is the shape. The 2026 figures are preliminary.

Year	January	April	June	December	Jan to Jun	Jun to Dec
2023	255.811	264.462	265.175	269.559	+3.7%	+1.7%
2024	269.767	277.955	276.851	272.438	+2.6%	-1.6%
2025	270.766	277.740	291.694	280.829	+7.7%	-3.7%
2026	280.520	294.707 (P)	not yet	not yet	+5.1% to April	not yet

Four years, same shape. The increase lands in the first half. The second half goes flat or negative, and in 2025 it gave back most of the gain. That is a real seasonal pattern and it is worth knowing, because it means the price you are quoted in the fall is usually close to the price you will pay in January, and the price you get quoted in February is usually not the price you will pay in June.

Now the April-to-July question specifically. Same series:

2023: April 264.462 to July 267.706, up 1.2%
2024: April 277.955 to July 277.747, down 0.1%
2025: April 277.740 to July 286.516, up 3.2%

Two of those three years show essentially no factory-level move across the exact stretch of the calendar when your phone will not stop ringing. Even 2025, the hot year, is 3.2% across a quarter. If your April and July invoices for the same condenser are 8% or 12% apart, the index is telling you plainly that the factory did not do that. Something downstream did.

The broader industry index, air-conditioning, refrigeration and forced air heating equipment manufacturing (PCU333415333415), shows the same first-half shape and is worth a second look if your mix runs wider than split systems. It is not the better number for a condenser, because it is an industry’s output prices rather than the product.

Why the increase lands in the first half

The index shows the pattern. It does not explain it, and honest reporting means saying so rather than filling the gap with a confident story. What is publicly verifiable is the pattern itself and the general cost pressure behind it.

What the AGC of America reported for May 2026 is useful context: the producer price index for inputs to new nonresidential construction rose 1.8% in the month and 8.4% year over year, the largest annual jump since the pandemic, while contractors’ own bid prices rose only 3.5% year over year. Copper and brass mill shapes were up 26.8% year over year, aluminum mill shapes up 48.8%. Both of those are inside a condenser. When the metal in the equipment moves that hard, the equipment index follows, and it follows on whatever schedule the manufacturers publish their increases on.

The practical move here is to ask instead of theorize. Your equipment rep knows the effective date of the next published increase, and that date is not a secret. Two questions, once a quarter:

When is the next published price increase effective, and what percentage?
Does an order placed before that date hold the old price at ship, or at order?

Those two answers are worth more than any index, because they are specific to the brand you actually install. Write the answers down with the date you got them. That file becomes your own seasonality record, which beats a national average every time.

The July premium is created between the factory and your truck

Here is where the money actually moves. None of these require anyone to behave badly. All of them are ordinary operational reality at a busy branch in July.

The quote expired and nobody said so. Equipment quotes carry validity windows, and in a rising market those windows get shorter. A quote written in April for a change-out scheduled in July may simply be dead by the time you order, and the reorder repricing at current numbers is not an error. This is the single most common cause of an April-to-July gap on identical equipment, and it is worth reading up on separately in quote versus invoice mismatch.

The job-quoted price reverted to stock pricing. A job quote is scoped to a quote number, a model, and a quantity. Order two more condensers in July than the quote covered, or order them without the quote number attached to the PO, and the extra units price at your standard rate rather than the quoted one. Same branch, same rep, different record. The mechanics behind that fallback are the same ones in contract price versus counter price.

The model you wanted was gone and you took the substitute. In July, the stocked model with the good program price is the one that runs out first. The substitution is usually the right call operationally, since a homeowner with no cooling does not care about your price file. But the substitute is a different part number, and any special pricing behind the original does not travel with it.

Freight and delivery got more expensive, and separately billed. AGC’s May 2026 release put diesel fuel up 105.9% year over year and truck transportation up 17.3%. A summer delivery on a rush schedule can carry surcharges that a February stock order does not. Those lines are frequently on the invoice and not on the quote.

You bought from a second branch or a second house. When your usual branch is out, you buy where the unit is. Account pricing does not always propagate identically across branches, and it certainly does not travel to a supplier you rarely use.

Nobody had time to check. The real seasonal effect is on your attention, not just on the price. In July you are approving invoices at 9pm between service calls. In February you read them. A price that would have generated a phone call in February gets paid in July, which is not a supplier problem, it is a calendar problem, and it is the one you can actually fix.

Sheet metal follows the same calendar. Copper does not.

If you fabricate, this matters, because your two biggest material inputs behave differently across a year.

Duct tracks the same first-half-loaded pattern as equipment. Use the duct commodity series, not the broad basket and not the industry index: BLS publishes sheet metal air-conditioning ducts and stove pipe (WPU10730120). January 2025 at 289.683 rising to 300.699 in June, up 3.8%, then flat through December at 300.831, up 0.04% across the whole second half. 2026 repeats the shape at a smaller size: January 300.831 to June 304.143 preliminary, up 1.1%. Year over year, June 2025 to June 2026, duct is up 1.1%, against about 17% for steel mill products over the identical twelve months. The wider sheet metal products basket (WPU1073) sits in between at up 5.0%.

Copper does not care what month it is. From the BLS copper and brass mill shapes series, 2025 ran 645.990 in January, dipped to 627.556 in March, sat at 637.408 in June, then climbed hard into year end at 712.565 in December. 2026 opened at 747.384 and reached 803.275 preliminary in June, up 7.5% in six months and up 24.3% since January 2025. That is a commodity moving on its own schedule, not a seasonal program.

Input	Seasonal shape	What it means for you
Equipment (condensers, air handlers)	First-half increase, flat second half	Lock fall and winter quotes; verify anything quoted before an increase date
Sheet metal and duct	Same first-half-loaded shape	Buy ahead where storage allows; recheck unit price each spring
Line set and copper fittings	No reliable seasonal shape, moves with the metal	Check the current index before bidding, not the calendar

The consumables side of that table gets its own treatment in refrigerant, line set and sheet metal price increases.

How to check whether your own condenser price is seasonal

A national index tells you what the industry did. It does not tell you what your account did. Here is the check, and it takes about an hour with a stack of invoices.

Pick one model number you buy every year. A three-ton 14.3 SEER2 condenser, a specific air handler, whatever you actually stock. One model, not a category.
Pull every purchase of that model for the last twenty-four months. You need two seasons to say anything about seasonality. One is an anecdote.
Normalize the line. Strip freight, strip any core or environmental line, strip tax. You want the unit price of the box.
Note the pricing basis on each one. Quote number, job number, stock order, or counter. This column is the one that will explain most of your variance.
Plot the twenty-four numbers by month. You are looking for two things: a step that repeats in the same month both years, which is a published increase, and one-off spikes, which are almost always a pricing-basis failure rather than a market move.
Compare the step to the index. If your April-to-July gap is wider than the index moved over the same months, the difference is downstream and it is recoverable.

That last step is the whole point. The index is the denominator. Your invoices are the numerator. Telling a real market move apart from a lookup that failed is the difference between a phone call to your rep and a shrug.

What to do, by season

Fall, September through November. Prices are flat and your rep has time. This is when you ask for the next year’s terms, get the published increase date in writing, and run the twenty-four-month check above. Take the negotiating groundwork from how to negotiate with your supply house into that meeting.
Winter, December through February. Lock what you can lock. Get quote validity windows in writing, in days, on every equipment quote. Buy sheet metal ahead if you have the racking and the cash.
Spring, March through May. This is when the increase lands. Recheck the unit price on your top ten SKUs against last quarter, not against last year. Reprice any bid you have out that is more than sixty days old.
Summer, June through August. Do not try to audit in real time, you will not have the hours. Instead put one control in place: match every equipment invoice to its quote number before it gets paid, which is the light version of three-way matching. Everything else can wait for September.
All year. Note the pricing basis on every equipment purchase at the time you make it. Ten seconds at the counter saves the entire reconstruction job later.

The distributor relationship is worth protecting, and almost none of what shows up in a July invoice is anyone at the counter trying it on. Expired quotes, substituted models, and rush freight are what a busy season produces. But a price that moved for one of those reasons is a price you can ask about, and reps fix recent errors routinely. The only version that never gets fixed is the one nobody noticed until March.