PERFORMANCE GUIDELINES: 8. INTERIOR CLIMATE CONTROL

8.8 Inadequate Heating

Acceptable Performance/Condition

Under design climatic conditions, heating systems shall be capable of maintaining an indoor air temperature in accordance with the BC Building Code (BCBC).

If outdoor temperatures are below the local design temperature, maintaining heat at the BCBC level may be limited and is not considered to be a defect.

Generally, a temperature reading is taken five feet above floor level and as close as possible to the centre of the warm air supply and cold air return in any living area after the heating system has been running for an appropriate period of time. A temperature difference of +/- 3 degrees Celsius is considered acceptable between living areas on the same floor.

Refer to the BCBC for heating requirements of unfinished basements and crawl spaces.

Several factors affect living space temperatures and comfort:

• Directional orientation: north-facing rooms are generally cooler than south-facing rooms.
• Windows: glass has little insulating value and allows more heat to escape from the room.
• Rooms over garages: have insulated floors that lose heat to the unheated garage below.
• Airflow: free airflow from the supply outlet in a room to a return inlet or undercut door is essential. Generally, a minimum 25 mm (1”) space under interior doors above the finished floor covering should be provided.
• Personal preference: personal comfort differs between individuals. Balancing the air delivery system may not completely compensate for the effects of these factors.

Warranty Coverage

• 2 years

Damage resulting from maintenance not conducted by the owner in keeping with maintenance documentation provided to the owner by the warranty provider or builder, or from additions, deletions or alterations made by the owner is not covered under warranty.

Claim Response

Heating systems not meeting the Acceptable Performance/Condition must be rectified.

Maintenance Tip

Check, clean or replace furnace filters as required and at least twice a year to allow the unobstructed flow of air through the furnace.

Ensure air intakes and exhaust vents are clear, especially during snow conditions.