Verified Nov 2026
Thermal & Fluid Systems
·
Oklahoma City, Oklahoma
·
Since 1961
IEC - International Environmental Corporation manufactures hydronic fan coil systems and related HVAC equipment, including horizontal and vertical fan coil units, blower coils, and modular designs. The company is headquartered in Oklahoma City, Oklahoma, United States, and was founded in 1961. It is estimated to have 200-500 employees and revenue in the $50-100M range, and it is privately held. Its products serve hospitality, multi-family, healthcare, education, and commercial office buildings. In mid-2026 it introduced the AHY, a modular air handling unit aimed at commercial buildings.
IEC - International Environmental Corporation at a glance
Revenue
$50-100M
Est. band
Employees
200-500
Founded
1961
Headquarters
Oklahoma City, Oklahoma
Certifications
ISO 14001 · ISO 9001
Industries
Automotive
Electric Vehicles
Construction
Medical
Renewable Energy
Industrial Equipment
STABILITY SIGNALS
Established & active
65 years in operation (founded 1961).
Holds ISO 14001, ISO 9001 certification(s) per public sources.
Overview
IEC - International Environmental Corporation manufactures hydronic fan coil systems and related HVAC equipment, including horizontal and vertical fan coil units, blower coils, and modular designs. The company is headquartered in Oklahoma City, Oklahoma, United States, and was founded in 1961. It is estimated to have 200-500 employees and revenue in the $50-100M range, and it is privately held. Its products serve hospitality, multi-family, healthcare, education, and commercial office buildings. In mid-2026 it introduced the AHY, a modular air handling unit aimed at commercial buildings.
At a glance
Attribute | Detail |
|---|---|
Founded | 1961 |
Headquarters | Oklahoma City, Oklahoma |
Employees | 200-500 |
Revenue | $50-100M (estimated) |
Primary capability | Thermal & Fluid Systems |
Certifications | ISO 14001 · ISO 9001 |
What IEC - International Environmental Corporation makes
The company holds ISO 9001 and ISO 14001 certifications and states that its products are engineered and manufactured in the United States.
Certifications
IEC - International Environmental Corporation is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 14001 — iec-okc.com
ISO 9001 — iec-okc.com
Latest developments
2026-07-22 — IEC Introduces Modular AHY Air Handling Unit - CCR-Mag.com (ccr-mag.com)
2026-07-10 — IEC Introduces Modular AHY Air Handling Unit | Contracting Business (contractingbusiness.com)
2026-06-29 — IEC Launches AHY, a New Modular Air-Handling Unit for Commercial Buildings (thehardwirenews.com)
2026-06-29 — IEC AHY Air Handling Unit | phcppros (phcppros.com)
2026-04-01 — IEC Announces Integrated ERV System with 80% Energy Recovery | Contracting Business (contractingbusiness.com)
2026-02-24 — Introducing the IEC AHY Air Handling Unit — a modular indoor solution engineered for flexibility, performance, and simplified installation. (linkedin.com)
Company details
IEC is privately held, with an estimated 200-500 employees and an estimated revenue band of $50-100M. IEC - International Environmental Corporation was founded in 1961, has an estimated 200-500 employees, and is headquartered in Oklahoma City, Oklahoma. On the LightSource stability read it is rated "Established & active": 65 years in operation (founded 1961). Holds ISO 14001, ISO 9001 certification(s) per public sources.
Frequently asked questions
What does IEC - International Environmental Corporation make?
IEC - International Environmental Corporation manufactures hydronic fan coil systems and related HVAC equipment, including horizontal and vertical fan coil units, blower coils, and modular designs. The company is headquartered in Oklahoma City, Oklahoma, United States, and was founded in 1961. It is estimated to have 200-500 employees and revenue in the $50-100M range, and it is privately held. Its products serve hospitality, multi-family, healthcare, education, and commercial office buildings. In mid-2026 it introduced the AHY, a modular air handling unit aimed at commercial buildings.
Where is IEC - International Environmental Corporation headquartered?
IEC - International Environmental Corporation is headquartered in Oklahoma City, Oklahoma (I-40, Oklahoma City, Oklahoma).
When was IEC - International Environmental Corporation founded?
IEC - International Environmental Corporation was founded in 1961.
How big is IEC - International Environmental Corporation?
IEC - International Environmental Corporation has an estimated 200-500 employees, with revenue in the $50-100M range (estimated).
What certifications does IEC - International Environmental Corporation hold?
IEC - International Environmental Corporation lists ISO 14001 · ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Related suppliers
Explore other suppliers in the LightSource directory:
Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Evaluating suppliers like these?
This profile comes from a public-data sample of around 1,000 companies. Book a demo to see the full LightSource marketplace and supplier discovery platform — 1M+ credible suppliers, with AI-run sourcing events.