What a residential house shall have before using heating system?
Every house in Canada that is for living must have a heating system. Prior to use this heating system few things is a bylaw and has to be follow by city code.
Every house shall have air circulation at the house and fresh air from out side
Air circulation in the house happens with furnace, air handler or HRV. The primary houses in Canada normally has a furnace unit to heat up the house. This furnace consist of a supply air and return air. A blower in the furnace make the circulation happened.
Bigger houses and more luxury one will be heat up with a boiler, either floor heat or baseboard; however, they also have a air handler to help more heat and circulating the air in the house. When using a air handler the duct system will be a bit different than the ducting for a furnace. We use much less duct and return and smaller size. The reason is the furnace is the main heat, in other hand in the air handler the main heat is the floor heat or baseboard heating.
Also some houses or basement that are using baseboard heating or floor heat system are using another system for air circulation called Heating Recovery Ventilation (HRV). The HRV is a electrical air circular with proper filters that is used support the supply air and rerun air. All the room shall have supply and return. The washroom are not mandatory; however, it is good to have a supply line. Also the Kitchen of the house need only the supply line. The reason is the fan is used in the both cases.
Fresh Air from outside
One of the very important part in the house is to have fresh air from outside to the house. This occurs with few ways. If the house used a furnace a fresh air of minimum line size of 4” should connect to a return air in the house. If the house using the air handler same thing as the furnace. If the house is using the HRV no need extra fresh air to the house because the HRV itself has two line to the outside one exhaust and one fresh air to the house.
The fresh air to the house must be 3’ away from all exhaust such as furnace exhaust, gas meter exhaust or dryer exhaust.