Rest Easy! First Klass Mechanical Is Here For All Your Plumbing, Heating, Air Conditioning & Gas Fitting Needs. We provide service for commercial, industrial and residential projects in Kelowna and area. At First Klass Mechanical our plumbers, heating technicians, air conditioning technicians, sheet metal workers and gas fitters all work in cooperation with home owners, contractors, other trades and labourers to ensure that all specifications are met to ensure the efficient and high quality completion of any project.