Because ventilation requirements vary from state to state and even from city to city it s important to check with local.
Kitchen ventilation building code. Moreover code watcher advises that since 2009 the international residential code irc includes a section on air replacement for houses with active kitchen ventilation. The ontario building code exhaust ducts and outlets 6 2 3 8. Building code requirements for kitchens. 2 exhaust ducts of nonmechanical ventilating systems serving similar occupancies may be combined immediately below the point of final delivery to the outside.
Some state building codes do require mechanical ventilation such as an exhaust fan in the kitchen. With the exception of smoking lounges the ventilation rates in table 403 3 1 1 are based on the absence of smoking in occupiable spaces. If this is mandatory under your local building codes there will also be specifications on the location of the range hood relative to the appliance clearance to combustibles from the range. In particular the building code of australia bca states that you must have windows that are equal in size to at least 10 of the floor space for the purpose of natural light or 3 for rooflights or a proportional combination of windows and rooflights.
When planning a ventilation system there are a few building code requirements that you need to be aware of. Natural ventilation can not be met because there is no window in the kitchen. The ventilation system shall be designed to supply the required rate of ventilation air continuously during the period the building is occupied except as otherwise stated in other provisions of the code. Nothing requires a hood the only requirement is makeup air which can be handled by the hvac and an exhaust system to the outside which will remove 100 of the amount of air supplied to the kitchen.
A code may require that a standard be met. Authority for regulating ventilation in buildings is left up to each state and usually that authority is delegated to local jurisdictions counties and cities. Now a mechanical exhaust system is required for the kitchen. Kitchen ventilation typically is provided by a vent hood also called a range hood or by an above the counter microwave with an integrated vent fan.
In the u s no national ventilation code exists. Controlled ventilation code note2 and section 6 5 7 1 of ashrae standard 90 1 2010 note that the dcv is a mandatory requirement and some reduction of ventilation air in the dining spaces must be included while the kitchen ventilation requirement is. Building codes are sets of rules requirements and recommendations intended to promote the design and construction of safe buildings. Exhaust ducts and outlets 1 except as provided in sentence 2 exhaust ducts of nonmechanical ventilating systems serving separate rooms or spaces shall not be combined.
Ventilation codes are regulations with the force of law.