HVAC Price Increases May 2026: Carlisle, Systemair, Nu-Calgon and More — The Full List

The price increase announcements keep coming. ACHR News published a fresh wave of HVAC and related product price increases effective May 2026 — affecting everything from HVAC brands and ventilation products to pumps, glycols, and fittings. For contractors building estimates, quoting jobs, or managing parts inventory, this is not background noise. These are direct cost inputs that affect every quote you write.

Here is the complete May 2026 HVAC price increase list, sourced from ACHR News, with context on what each increase means for contractors and their customers.

The May 2026 Price Increase List in Full

Effective May 1, 2026:

• Carlisle HVAC Brands: 3 to 5 percent on all items. Carlisle's HVAC brands include a range of residential and commercial HVAC products and components. A broad 3 to 5 percent increase across all items means every Carlisle product in your distributor account has moved up in price.

• Glasfloss: 2 to 4 percent. Glasfloss is a major US manufacturer of air filtration products including HVAC filters. At a time when air quality awareness is increasing demand for higher-MERV filters, a 2 to 4 percent increase on filter stock is a direct parts cost impact.

• Little Giant Pumps: 2 percent. Little Giant makes condensate pumps widely used in HVAC applications — a small percentage increase on a relatively inexpensive part, but worth updating in parts price books.

• OmegaFlex: 6 percent on fitting products. OmegaFlex manufactures flexible gas piping and fittings used in gas appliance connections. The 6 percent increase on fittings is meaningful for contractors doing gas appliance work.

• Parker Hannifin — Parker Aftermarket: Average weighted increase of 3.75 percent, excluding ZoomLock products. Parker's HVAC aftermarket products include refrigerant fittings, valves, and service parts. The ZoomLock exclusion is notable — one of the most-used refrigerant connection product lines holds its price.

• Reflectix: Up to 12 percent. Reflectix makes reflective insulation and duct wrap products. A 12 percent increase on insulation materials is significant for contractors doing duct work or insulation jobs alongside HVAC installation.

• Slant/Fin Baseboard: 5 percent. Slant/Fin is the dominant US manufacturer of residential hydronic baseboard heating products. This affects contractors serving hot water heating system markets.

• Sporlan: 4 percent. Sporlan (a Parker Hannifin brand) makes refrigerant flow controls, filter driers, and expansion devices — components used in every refrigerant system service and installation.

ACHR News reported a new wave of HVAC product price increases effective May 1, 2026, including Carlisle HVAC Brands (3 to 5 percent), Glasfloss filters (2 to 4 percent), Parker Hannifin aftermarket (3.75 percent average), Reflectix insulation (up to 12 percent), and Sporlan refrigerant controls (4 percent) — continuing the pattern of incremental manufacturer increases that have compounded across the industry since 2020.

Additional May 2026 Increases After May 1

Several manufacturers set effective dates after May 1:

• Systemair — Fantech: Average increase of 3.5 to 5 percent by product group effective May 1, plus an additional 6.5 percent specifically on residential ventilation products effective May 29. The two-stage increase from a single manufacturer in the same month is unusual and signals meaningful cost pressure in the residential ventilation segment — relevant for contractors doing IAQ and ventilation work.

• Honeywell Commercial: Price increase effective May 2. Specific percentage not publicly disclosed at time of reporting — contractors should verify current pricing with their Honeywell Commercial distributor.

• DirectedAir: 5 to 14 percent on select product categories, effective May 4. DirectedAir makes packaged terminal equipment for multi-family and commercial applications.

• Nu-Calgon: 15 percent increase on specific glycol products only, effective May 6. Nu-Calgon is one of the most widely used HVAC chemical and treatment product brands. The 15 percent increase on glycol products is significant for contractors who use glycol antifreeze in hydronic and geothermal systems.

• Shurtape: 3.5 to 10 percent by product category, effective May 7. Shurtape makes HVAC foil tape, duct tape, and related installation products — direct material cost for installation crews.

Why the Increases Keep Coming

The pattern of incremental manufacturer price increases — now running continuously since 2020 — reflects structural cost pressures that have not resolved:

• Raw material costs: Steel, copper, aluminium, and petrochemical-based materials (foams, films, glycols) remain above pre-pandemic baseline costs. Each derivative product that uses these materials absorbs ongoing commodity cost pressure.

• Tariff pass-through: The 10 percent baseline tariff on all imports and higher rates on specific country-of-origin goods continue to add cost to imported materials and components. Some of the May increases explicitly reflect tariff cost pass-through.

• Energy costs: Manufacturing energy costs, particularly for energy-intensive processes like metal fabrication, have remained elevated — adding to production cost structures across the supply base.

How to Protect Your Margins

• Update your price book immediately: Every increase on this list takes effect within the next 30 days. If you are still quoting from April pricing on any of these products, you are underpricing.

• Review parts-heavy service jobs: Jobs where parts represent a large share of the total cost — system tune-ups with filter replacements, chemical treatments, or fitting-intensive refrigerant work — are most exposed to these increases. Review your service pricing for these job types.

• Consider strategic inventory purchases: For high-velocity consumables (filters, refrigerant fittings, duct tape, chemical treatments), purchasing inventory before May effective dates locks in pre-increase pricing. Check with your distributor on lead times and inventory availability.

Frequently Asked Questions

What HVAC products had price increases in May 2026?

ACHR News reported May 2026 price increases from Carlisle HVAC Brands (3 to 5 percent), Glasfloss filters (2 to 4 percent), Parker Hannifin aftermarket parts (3.75 percent average), Reflectix insulation (up to 12 percent), Sporlan refrigerant controls (4 percent), Systemair/Fantech ventilation (up to 6.5 percent additional), Nu-Calgon glycols (15 percent), and Shurtape tape products (3.5 to 10 percent).

Why do HVAC product prices keep increasing?

Ongoing HVAC price increases reflect persistent raw material cost pressure (steel, copper, petrochemicals), tariff pass-through from import duties on materials and components, elevated manufacturing energy costs, and the compounding effect of annual increases from multiple manufacturers simultaneously.

How should HVAC contractors handle May 2026 price increases?

Update your parts price book to reflect all effective-date increases before quoting any job that includes affected products. Review service pricing for parts-intensive job types. Consider strategic pre-increase inventory purchases for high-velocity consumables where distributor stock is available.