At J W Brennan Cooling & Heating, we are happy to handle all of your commercial & residential HVAC needs. Our installation technicians are certified, and so are our refrigeration technicians. Whenever possible, we use factory authorized parts to keep your equipment operating at optimum efficiency. We work with all makes and models and offer emergency service when you need it most. We handle everything you need for your business including HVAC system design, installation, and repair.