ACG vs Harmon
Harmon is a top-volume curtain wall subcontractor in North America and the founding company of Apogee Enterprises. ACG is an owner-led, woman-owned Florida Division 08 glazing subcontractor founded in 2021. Different scale, different fit — the real question is project size and location, not which company is better. Here is the side-by-side.
ACG vs Harmon: the facts.
ACG figures are drawn from American Commercial Glass company records (FL CGC #1531993). Harmon figures are drawn from public company sources — harmoninc.com (75-year brand history) and Harmon's LinkedIn company page. Where a Harmon value is not publicly disclosed, the cell is marked "—" rather than estimated.
Which one fits your project?
When ACG is the fit
- You need Florida-specific depth: HVHZ Miami-Dade NOA compliance, Florida Product Approval, and hurricane-zone glazing ACG installs every week.
- Speed and a single owner-level decision-maker matter more than brand size — Connor or Rielly is one call away on every change order, delivery, and schedule conflict.
- Your project lives in ACG's size range: storefront, window wall, and mid-rise curtain wall for commercial, multifamily, and institutional buildings.
- You want a Woman-owned · Rielly Walsh, CEO and 51% majority owner sub running submittals and schedule natively in Procore, with 48-hour bids on documented scopes.
When Harmon is the fit
- Your project is a high-rise tower or stadium needing large-volume unitized curtain wall engineered and manufactured at national scale.
- You want a single subcontractor with offices spread across the U.S. and Canada to self-perform on a multi-region program.
- You need the in-house preconstruction, engineering, manufacturing, and field capacity of a 75-year company inside a publicly traded parent.
Both companies build good buildings. They are built for different jobs.
For the record.
Owner-led. Florida-built.
American Commercial Glass, Inc. is a Florida-licensed Division 08 commercial glazing subcontractor founded in 2021 and headquartered in West Palm Beach, with offices in Naples and Tampa and a Nashville office opening Q3 2026. ACG is owner-led by President Connor Walsh and CEO Rielly Walsh, and is Woman-owned · Rielly Walsh, CEO and 51% majority owner.
National curtain wall scale.
Harmon, Inc. traces its history to Harmon Glass Company, founded July 12, 1949, and is the founding company of Apogee Enterprises, Inc. (NASDAQ: APOG). Harmon describes itself as the top curtain wall subcontractor in North America, supporting clients through preconstruction, engineering and design, manufacturing, and field operations, with local offices across the United States and Canada.
Bidding in ACG's markets? Send the plans.
If the work is in Florida and in ACG's size range, an owner-reviewed proposal or budget direction comes back in 48 hours.