From www.hvac-certification-exam-guide.com

This practice exam may be helpful to study for these NATE/ICE certification test: Gas Furnace Installation (GS-IN), Gas Furnace Service (GS-SV), Hydronics Gas - Installation (HG-IN), Hydronics Gas Service (HG-SV), Hydronics Oil - Installation (HO-IN), Hydronics Oil Service (HO-SV) and ARI-ICE. The main topics covered in this Gas Heating Certification - Practice Exam #4 are:

• Water Heaters and Combination Systems
• Forced Warm Air Heating Systems
• Hydronic Heating Systems
• Space Heaters and Decorative Appliances
• Venting Practices
• Forced Air Add-On Devices
• Air Handling