Here is a comprehensive HVACR price increase list for June 2026, documenting price actions across a range of insulation, valve, duct sealant, motor, pump, water heater, filtration, flexible duct, tape, and controls product lines. The June increases arrive on top of the May 2026 increases already covered in this publication — adding further pressure to contractor cost structures heading into the summer peak season.
This is the complete confirmed list of June 2026 price increases affecting HVAC contractors:
June 2026 Price Increases — The Full List
• Airex: 2% to 8% across product lines, effective June 1, 2026. Airex manufactures flexible duct and related products — a category used on virtually every residential and light commercial HVAC installation.
• Armacell: 7% on all flexible elastomeric foam insulation products, effective June 1, 2026. Armacell is a primary manufacturer of pipe and duct insulation — the 7% increase affects mechanical insulation used in HVAC, plumbing, and refrigeration applications.
• Design Polymerics: 3.5% on select duct sealants, specialty coatings, and adhesives; 5% on DP 1090, effective June 1, 2026. Design Polymerics manufactures water-based duct sealants and coatings widely used in residential and commercial duct system installation and repair.
• Diversitech: 1% across product lines, effective June 1, 2026. Diversitech manufactures HVAC accessories including condensate management, equipment pads, disconnect boxes, line set covers, and accessories — a broad product category present on most HVAC installations.
• Emerson Nidec Motors: Price increase effective June 1, 2026. Emerson Nidec manufactures electric motors for HVAC equipment including furnace blower motors, condenser fan motors, and ECM motors — a category where price increases directly affect service and repair costs.
• Jones Stephens: 10% on poly and rubber insulation, effective June 1, 2026. Jones Stephens manufactures plumbing and HVAC fittings, valves, and insulation — the 10% insulation increase is one of the steeper June actions.
• Pro-Flex: Varies by product category — 6% on CSST and fittings, approximately 8% on MDPE gas pipe, 5% on rigid anodeless risers, approximately 20% decrease on yellow-coated and similar products. Pro-Flex manufactures flexible gas piping used in HVAC and plumbing installations — the 20% decrease on some yellow-coated products partially offsets increases elsewhere in the range.
June 2026 HVAC price increases — Airex 2-8% (effective June 1), Armacell 7% on elastomeric foam insulation (effective June 1), Design Polymerics 3.5-5% on duct sealants (effective June 1), Diversitech 1% (effective June 1), Emerson Nidec Motors (effective June 1), Jones Stephens 10% on insulation, Pro-Flex 6-8% on gas piping — add to May 2026 increases and require immediate price book updates.
The Cumulative Burden — What June Adds to an Already Pressured Market
June 2026 price increases follow May 2026 increases on Williams/Cozy heating products (6%), Navien, AO Smith water heaters (7%), and Legend Valve (5-10%). The cumulative effect across May and June 2026 touches essentially every category of HVAC installation material — insulation, sealants, motors, flexible duct, gas piping, valves, and water heaters.
For contractors who have not updated their price books since April 2026, the gap between their quoted costs and their actual material costs is now material. A residential HVAC installation that was priced in March 2026 using March pricing may now be underpriced by 3 to 8 percent on materials alone — enough to eliminate the profit margin on the job entirely if the original margin was thin.
Immediate Actions for Contractors
• Update price books for all June 1 effective date products immediately — Airex, Armacell, Design Polymerics, Diversitech, Emerson Nidec, Jones Stephens, and Pro-Flex product lines
• Review any quotes issued before June 1 that have not yet converted to signed contracts — requote if necessary before the customer signs at the old price
• Update service agreement renewal pricing — maintenance agreements that include parts at fixed rates need to reflect current motor and accessory pricing
• Check with your distributor for any additional manufacturer price increases not yet covered in ACHR News reporting — some manufacturers announce increases with short lead times
Frequently Asked Questions
Which HVAC products had price increases in June 2026?
June 2026 HVAC price increases confirmed by ACHR News include: Airex 2-8% (flexible duct, June 1), Armacell 7% (elastomeric foam insulation, June 1), Design Polymerics 3.5-5% (duct sealants, June 1), Diversitech 1% (HVAC accessories, June 1), Emerson Nidec Motors (June 1), Jones Stephens 10% (poly and rubber insulation), and Pro-Flex 6-8% (CSST, MDPE gas pipe, June 1).
