Is there any wait time between G3, G2 and G1?

If you are taking the full-time G3/G2 Co-op or HVAC Co-op there is no wait time between taking your G3 and G2 course. However, if you are to register for a G3 Evening and hope to have it followed by a G2 Evening keep in mind that it could be up to 2-6 months wait as we only typically run G2 Evening courses once or twice a year. In regards to the G1 course, you would need a minimum 2 years holding a G2 license and proof of hours to write the final exam.