AC超过9KHz, DC超过1.705MHz,就需要考核FCC, 豁免及非豁免产品如下
Exempted Devices
Exempt Cooking or Food Preparation Devices
Refrigerators Freezers
Stoves Juice extractors
Bread makers Coffee Makers
Food warming pads Deep-fat fryers
Exempt Appliances for
Washing and Drying Clothes
Washing machines Clothes dryers
Exempt Household Cleaning Devices
Trash compactors Rug cleaners
Vacuum cleaners Dishwashers
Irons Trash compactors
In-sink garbage disposals
Exempt Household Water and Air Conditioning
Equipment
Humidifiers Dehumidifiers Water Heaters
Room Fan Heater Room air-conditioners
(window, floor. standing)
HVAC systems
(*not including
external thermostats) Central Air-conditioners
(Split-System)
Non Exempt Devices
External Thermostats* Exercise Equipments Hair Dryers
Heat Guns Hair straighteners Electric Blankets
Paper Shredders Bed Warmers Portable Personal Fan Heaters
https://fjallfoss.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=33062 
