O&L
Duct Design

My name is Josh Dewachter, owner of O&L Duct Design. I am a Building Inspector as well as a ticketed Sheet Metal worker with over 7 years of experience in both residential and commercial sectors installing and fabricating the material.  O&L is a fully insured business providing Residential Heat Loss & Heat Gain Calculations, Ventilation Designs as well as Duct Designs based out of Tillsonburg, Ontario.  Our goal is to provide efficient and accurate designs to our clients by exceeding their expectations and designing a well functioning HVAC system. We apply our field experience into our services to produce a functional design from paper to installation.