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Exam Information
Official specifications published by NADCA
Exam Format
Registration
Validity
ASCS Exam Topics and Domains
ASCS is organized into 7 weighted domains. Expect to work with Standards compliance, Access creation, ACR compliance, AHU inspection, and more.
Understand the Necessity for Cleaning
Improved Indoor Air Quality
Demonstrate knowledge of improved indoor air quality
Energy Savings
Demonstrate knowledge of energy savings
System Lifespan
Demonstrate knowledge of increased lifespan of system
Customer Expectations Management
Manage customer expectations
Understand Mechanical Systems
HVAC System Design
Demonstrate knowledge of HVAC system design (Types of systems)
HVAC System Components & Elements
Demonstrate knowledge of HVAC system components & Elements (Coils, ductwork, etc.)
Perform HVAC System Inspections
Conflicts of Interest
Disclose any conflicts of interest
System Condition Assessment
Assess the HVAC system condition
Visual Inspections
Conduct visual inspections
Problem Identification and Action Planning
Identify problem conditions and plan of action
Understand Contamination
Causes of Contamination
Causes of contamination to the HVAC system
Contamination Agents
Contamination agents (Types, sizes)
Exposure Effects
Exposure effects
Understand HVAC Cleaning and Restoration Procedures
Project Assessment
Perform project assessment
Scope of Work Definition
Define the scope of work (Select equipment, products and methods)
Clean and Restore HVAC System
Clean and restore the HVAC system (Access, engineering controls)
Validation
Validation
Protect the Health & Safety of Employees and Building Occupants
Federal Regulations and Laws
Adhere to federal regulations and laws
Job Site Protection
Protect the job site
Risk Management
Understand risk management
Understand Standards and Guidelines
NADCA Standards
National Air Duct Cleaners Association (NADCA)
SMACNA Guidelines
Sheet Metal and Air Conditioning Contractors' National Association (SMACNA)
NAIMA Guidelines
North American Insulation Manufacturers Association (NAIMA)
ASHRAE Standards
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE)
IICRC Standards
The Institute of Inspection, Cleaning and Restoration Certification (IICRC)
NFPA Standards
National Fire Protection Association (NFPA)
ACCA Standards
Air Conditioning Contractors of America (ACCA)
How do I earn this certification?
Passing ASCS earns the Air Systems Cleaning Specialist certification. It sits in the HVAC Hygiene and Indoor Air Quality track.
- CVI - Certified Ventilation Inspector Advanced inspection certification
- CMRC - Certified Mold Remediation Contractor Specialized mold remediation certification
Practice with Precision
The PlanetCert Simulator mirrors the real exam environment with authentic questions and timed pressure.
How to study for this exam?
The most effective way to prepare for ASCS is by using the PlanetCert Simulator to practice questions and review detailed explanations.
What's changed on this exam?
- ACTIVE
- Last content update: 2023
- HEPA Filtration Systems Latest standards Critical for containment and air filtration device usage • Release date: 2024
- Negative Air Machines Current models Essential for engineering controls and containment • Release date: 2024
- Video Inspection Equipment HD and 4K systems Required knowledge for thorough inspections • Release date: 2023-2024
Who should take this exam?
This exam is typically taken by HVAC cleaning technicians and Project managers.
- 3 years of HVAC system cleaning experience
- Field experience in HVAC inspection and restoration
- Knowledge of HVAC system components and operations
- Familiarity with industry standards (ACR, ASHRAE, IICRC)