HVAC Price Increases May 2026
36 manufacturer price-increase letters from 33 brands taking effect in May 2026. Every row links to the original letter or posting.
By month: January 2027 · November 2026 · October 2026 · September 2026 · August 2026 · July 2026 · June 2026 · May 2026 · April 2026 · March 2026 · February 2026 · January 2026 · December 2025 · November 2025 · September 2025 · August 2025 · May 2025 · April 2025 · March 2025 · February 2025 · January 2025
| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| May 31, 2026 | ICP Parts | 15% | Johnstone Supply (Muskegon Group) | |
| May 30, 2026 | Honeywell Commercial | 5% | Johnstone Supply (Muskegon Group) | |
| May 29, 2026 | Systemair | Fantech Additional 6.5% increase on residential ventilation products, effective May 29. This excludes light commercial ERVs and commercial roof fans. |
6.5% | ACHR News |
| May 25, 2026 | Robertshaw | Price increase, effective May 25. |
see letter | ACHR News Supply House Times / PM Magazine |
| May 25, 2026 | Uniweld | Approximately 3% on all items, effective May 25. |
Approximately 3% | ACHR News |
| May 25, 2026 | WaterFurnace | WaterFurnace announced an average 3.9% price increase across all residential product lines, parts, and accessories, effective May 25, 2026. Individual part numbers may vary. The… |
average 3.9%, 1.1% | Paschal (citing ACHR/manufacturers) |
| May 22, 2026 | Panasonic Fans | see letter | Johnstone Supply (Muskegon Group) | |
| May 18, 2026 | AO Smith Water Heaters | 7%, effective May 18. |
7% | ACHR News Johnstone Supply (Muskegon Group) |
| May 18, 2026 | Aervoe | 4% | Conklin Metal Industries | |
| May 18, 2026 | Legend Valve | 5-10% on most products, effective May 18. |
5-10% | ACHR News |
| May 17, 2026 | Navien | Price increase, effective May 17. |
see letter | ACHR News |
| May 15, 2026 | ICP Parts | 10%; 16% | Johnstone Supply (Muskegon Group) Supply House Times / PM Magazine | |
| May 13, 2026 | Copper | see letter | Johnstone Supply (Muskegon Group) | |
| May 11, 2026 | Heat Controller | TBD, effective May 11. |
see letter | ACHR News |
| May 11, 2026 | Vybond | 4% increase on all HVACR Nashua and Polyken tape products, effective May 11. |
4% | ACHR News |
| May 11, 2026 | Williams | 6% on Cozy and Williams residential heating products, effective May 11. |
6% | ACHR News |
| May 7, 2026 | Shurtape | 3.5-10% by product category, effective May 7. |
3.5-10% | ACHR News Conklin Metal Industries |
| May 6, 2026 | Nu-Calgon | 15% increase on specific glycol products only, effective May 6. |
15% | ACHR News |
| May 6, 2026 | NuCalgon | 15% | Johnstone Supply (Muskegon Group) | |
| May 4, 2026 | DirectedAir | 5-14% on select product categories, effective May 4. |
5-14% | ACHR News |
| May 2, 2026 | Honeywell Commercial | Price increase, effective May 2. |
see letter | ACHR News |
| May 1, 2026 | Carlisle HVAC Brands | 3-5% on all items, effective May 1. |
3-5% | ACHR News |
| May 1, 2026 | Cycan | 8% | Conklin Metal Industries | |
| May 1, 2026 | Glasfloss | 2-4%, effective May 1. |
2-4% | ACHR News |
| May 1, 2026 | Hardcast | 3% – 37.5% | Conklin Metal Industries | |
| May 1, 2026 | Ideal Products | 15% / 25% | Conklin Metal Industries | |
| May 1, 2026 | Little Giant Pumps | 2%, effective May 1. |
2% | ACHR News Johnstone Supply (Muskegon Group) Supply House Times / PM Magazine |
| May 1, 2026 | OmegaFlex | 6% on fitting products, effective May 1. |
6% | ACHR News |
| May 1, 2026 | Parker Hannifin | Parker Aftermarket Average weighted increase of 3.75%, excluding ZoomLock products, effective May 1. |
Average weighted increase of 3.75% | ACHR News |
| May 1, 2026 | Polymer Adhesive | 5% – 7% | Conklin Metal Industries | |
| May 1, 2026 | Reflective Products | 3.5% | Conklin Metal Industries | |
| May 1, 2026 | Reflectix | Up to 12%, effective May 1. |
Up to 12% | ACHR News |
| May 1, 2026 | Slant/Fin Baseboard | 5%, effective May 1. |
5% | ACHR News |
| May 1, 2026 | Sporlan | 4%, effective May 1. |
4% | ACHR News Johnstone Supply (Muskegon Group) Supply House Times / PM Magazine |
| May 1, 2026 | Systemair | Fantech Average increase of 3.5-5% by product group, effective May 1. |
Average increase of 3.5-5% | ACHR News |
| May 1, 2026 | Wesanco | 10% / 12% | Conklin Metal Industries |