L.J. Kernaghan Construction Ltd. not only provides trusted service with our 32 years experience, our knowledgeable staff is also qualified to assist you in any way possible. We have been installing and servicing WaterFurnace geothermal systems since 1986. Our staff has a number of qualifications and industry accreditations and has maintained these for a number of years. We have been HRAI certified for Residential Heat Loss/Heat Gain/Radiant Design, HRAI certified for Residential Air Systems and Installation, and HRAI certified for Mechanical Ventilation and Installation Design for over 15 years.