Tempo:
separate thermostatic controls, these controls must be designed in a way that one cannot heat and cool simultaneously. Carbon Monoxide Detectors Carbon monoxide (CO) is a colourless, odourless gas that can accumulate in lethal concentrations in enclosed spaces without occupants being aware of it. Fuel-fired space or water heating equipment is a potential source of CO. Most well-tuned heat-producing appliances do not produce CO and even if they do, it is removed through the venting system. However, heating appliances can operate poorly and venting systems can fail. All residential buildings that have fuel-burning appliances must have CO detectors located either in each bedroom, or located not more than 5 m (16 ft.)—measured along hallways—from each bedroom door. In addition, CO detectors are required where a bedroom shares a wall with a garage, or shares a wall with an attic space that abuts a garage.
AIR CONDITIONING SYSTEMS Since air conditioning (space cooling) systems are generally coupled with forced air heating systems, the wood framing considerations are much the same. For houses with electric baseboard or hydronic heating, air conditioning can be provided by a compact, quiet fan-coil installed in each room (or in as many or few rooms as desired) that is connected to an outdoor condenser unit. Such systems, often referred to as “mini-split systems”, provide local cooling but, if strategically placed in a few central locations, can cool an entire house. A common feature of most residential air conditioning systems is the outdoor condenser unit that is either placed on a concrete pad or is mounted on metal framework that is secured
to the exterior wall (or foundation wall) of the house. A hole is required in the exterior wall for the supply and return refrigerant piping between the indoor and outdoor units. Advanced planning with the mechanical contractor should determine if structural support is to be added to the exterior wall framing to accommodate a wall-mounted condenser unit and the location of the conduit for the refrigerant piping. Air conditioning systems are typically controlled by the same thermostat that controls the space heating system. Mini-split systems are controlled by unit-mounted thermostats (on the indoor fan-coil unit) or handheld remote controls.
VENTILATION SYSTEMS House ventilation is needed to maintain acceptable indoor air quality (IAQ) and to control indoor moisture levels. Air quality is important for human health and well-being. High interior moisture levels can promote the growth of mold and mildew and adversely affect human health and the durability of the building envelope. Ventilation can be provided naturally, typically through operable windows, and mechanically with fans and other equipment. Non-heating season ventilation can be provided either naturally or mechanically. Heating season ventilation must be provided by a mechanical system. Houses must be designed to make efficient use of energy by using effective heating, ventilating and air conditioning equipment that is properly sized. Install mechanical equipment inside the plane of insulation or ensure the equipment is suited for installation outdoors or in unheated space.
NATURAL VENTILATION Natural ventilation through operable windows can meet air change requirements during the non-heating season when the air entering the
AIR CONDITIONING SYSTEMS Since air conditioning (space cooling) systems are generally coupled with forced air heating systems, the wood framing considerations are much the same. For houses with electric baseboard or hydronic heating, air conditioning can be provided by a compact, quiet fan-coil installed in each room (or in as many or few rooms as desired) that is connected to an outdoor condenser unit. Such systems, often referred to as “mini-split systems”, provide local cooling but, if strategically placed in a few central locations, can cool an entire house. A common feature of most residential air conditioning systems is the outdoor condenser unit that is either placed on a concrete pad or is mounted on metal framework that is secured
to the exterior wall (or foundation wall) of the house. A hole is required in the exterior wall for the supply and return refrigerant piping between the indoor and outdoor units. Advanced planning with the mechanical contractor should determine if structural support is to be added to the exterior wall framing to accommodate a wall-mounted condenser unit and the location of the conduit for the refrigerant piping. Air conditioning systems are typically controlled by the same thermostat that controls the space heating system. Mini-split systems are controlled by unit-mounted thermostats (on the indoor fan-coil unit) or handheld remote controls.
VENTILATION SYSTEMS House ventilation is needed to maintain acceptable indoor air quality (IAQ) and to control indoor moisture levels. Air quality is important for human health and well-being. High interior moisture levels can promote the growth of mold and mildew and adversely affect human health and the durability of the building envelope. Ventilation can be provided naturally, typically through operable windows, and mechanically with fans and other equipment. Non-heating season ventilation can be provided either naturally or mechanically. Heating season ventilation must be provided by a mechanical system. Houses must be designed to make efficient use of energy by using effective heating, ventilating and air conditioning equipment that is properly sized. Install mechanical equipment inside the plane of insulation or ensure the equipment is suited for installation outdoors or in unheated space.
NATURAL VENTILATION Natural ventilation through operable windows can meet air change requirements during the non-heating season when the air entering the
©
2026
Lehal.net