Ontario’s Ministry of Environment defines wind turbines (WTs) like this:
- Class 1: wind facilities with a name-plate capacity of less than or equal to 3kW
- Class 2: between 3 kW and 50 kW
- Class 3: name-plate capacity of 50 kW or greater with a sound power level less than 102 dBA
- Classes 4 & 5: greater than 50 kW with a sound power level greater than or equal to 102 dBA
- Note that these classifications only consider dBA, not other types of noise.
- Name-plate capacity is the theoretical maximium output of a turbine.
- Turbines typically operate at about a quarter of their name-plate capacity.
- actual generation from wind is less than 10% of capacity during the summer months.