Subsidiary

State/County

Aarding Thermal Acoustics B.V.

Netherlands

Aarding Thermal Acoustics USA Inc.

United States

Arkanum Management Limited

United Kingdom

CECO Emtrol Buell India Private Limited

India

CECO Environmental (Shanghai) Co., Ltd.

China

CECO Environmental Arabia Limited

Saudi Arabia

CECO Environmental Asia Pacific Pte. Ltd.

Singapore

CECO Environmental Corp.

United States

CECO Environmental IP Inc.

United States

CECO Environmental Mexico S. de R. L. de C. V.

Mexico

CECO Environmental Middle East DMCC

United Arab Emirates

CECO Environmental Netherlands B.V.

Netherlands

CECO Environmental Services S de RL de CV

Mexico

CECO Group Global Holdings LLC

United States

Ceco Group, Inc.

United States

CECO Industrial Solutions, Inc.

United States

CECO Mexico Holdings LLC

United States

CECO Peerless (China) Environmental Co. Ltd.

China

CECO Peerless (China) Environmental Co., Ltd. - Shanghai Branch

China

CECO Peerless China Holdings LLC

United States

Compass Water Solutions, Inc.

United States

DS21 Co., Ltd.

Republic of Korea

Effox-Flextor-Mader Inc.

United States

Emtrol LLC

United States

Emtrol LLC - UK Branch

United Kingdom

Emtrol Ltd.

Canada

EnviroCare International, LLC

United States

Environmental Integrated Solutions Limited

United Kingdom

FKI, LLC

United States

Flextor, Inc.

Canada

General Rubber LLC

United States

H.M. White, Inc.

United States

Kemco Systems Co., LLC

United States

Malvar Engineering Limited

United Kingdom

Mefiag B.V.

Netherlands

Met-Pro (Hong Kong) Company Limited

Hong Kong

Met-Pro Technologies LLC

United States

Midflow Services, LLC

United States

MP China Company Limited

Hong Kong

Peerless Europe Ltd.

United Kingdom

Peerless Europe, Ltd - Dubai Branch

United Arab Emirates

Peerless Mfg. Co.

United States

Pinnacle Process Solutions, LLC

United States

Prochem, ULC

Canada

Profire Combustion, Inc.

Canada

Profire Energy, Inc.

United States

Profire Holdings, LLC

United States

The Kirk & Blum Manufacturing Company

United States

Transcend Solutions, LLC

United States

Verantis (Singapore) Pte. Ltd.

Singapore

Verantis Corporation

United States

Verantis Environmental Solutions (India) Private Limited

India

Verantis Environmental Solutions Group (Shanghai) Co. Ltd.

China

Verantis Holdings, Inc.

United States

Wakefield Acoustics Limited

United Kingdom

Western Air Ducts (UK) Limited

United Kingdom

WK Asia-Pacific Environmental PTE. LTD.

Singapore

WK Wärmetechnische Anlagen Kessel- & Apparatebau Verwaltungs GmbH

Germany

WK-AP-China Environmental Co., Ltd.

China

WK-Systems India Private Limited

India

WK-Systems, Inc.

United States