Welcome to Northumberland HVAC Mechanical, your heating and cooling expert in Toronto. provides a wide range of services in the HVAC field. We offer affordable and effective solutions for: Heating and cooling issues, Water heater sales, service and installation, Gas line installation, repair and relocation, Purer and cleaner indoor air and Red tags clearance for code violations. Schedule regular maintenance services for a fully functional HVAC system in winter or summer to avoid significant health and operational issues!