When should I install a Zoning System? If you are changing your Toronto area home air conditioner, furnace or heat pump, it is a good time to also install a new zoning system to fix hot and cold spots or special temperature needs in the home. When your new comfort equipment is matched with a zoning system, comfort is enhanced through precision temperature control in each zone. Zoning is also excellent for new homes since the system can be installed during construction. If you are buying a new home, check with your builder about a zoning system. It could make the difference between just enjoying your new house and being truly comfortable in it.