Appendix A – Acronyms

AHJ

Authority having jurisdiction

ANSI

American National Standards Institute

ASHRAE

American Society of Heating, Refrigeration and Air Conditioning Engineers

BIM

building information modelling

CAD

computer-assisted design

CNC

Computer Numerical Control

CSA

Canadian Standards Association

CWB

Canadian Welding Bureau

GMAW

gas metal arc welding

GTAW

gas tungsten arc welding

HRV

heat recovery ventilator

HVAC

heating, ventilation and air conditioning

LEED

Leadership in Energy and Environmental Design

MUA

make-up air unit

NBC

National Building Code

NFPA

National Fire Protection Association

OBD

Opposed Blade Damper

OH&S

Occupational Health and Safety

PPE

personal protective equipment

PSI

pre-safety inspection

PVC

polyvinyl chloride

RFI

request for information

RTU

roof top unit

SDS

Safety Data Sheet

SMACNA

Sheet Metal and Air Conditioning National Association

SMAW

shielded metal arc welding

TAB

testing, adjusting and balancing

TABB

Testing, Adjusting and Balancing Bureau

TDC

transverse duct connectors

TDF

transverse duct flange

TSB

Transportation Safety Board

ULC

Underwriters Laboratories of Canada

WETT

Wood Energy Transfer Technology

WHMIS

Workplace Hazardous Materials Information System