How is Section J Assessed?
As stated, Section J compliance is assessed against nine categories as described in section J of the National Construction Code. Based on the type of dwelling, the building is measured against these categories in order to assess its assumed thermal performance for new dwellings or rate it assumed existing thermal performance for alterations and additions on existing properties. Specifically, each building is assessed using a glazing calculator to assess the overall thermal performance of glazed elements with glazing and frame types taken into consideration as well as window orientation and relative ratio of glass to wall, and glass to floor. A lighting calculator is also use to assess the required and maximum energy usage of any given room within the building in order to reduce energy consumption as well as to meet overall state and national energy efficiency goals. Areas that do not comply under the Section J provisions will need recommendations in order to meet the minimum requirements of the Deemed-to-Satisfy (DtS) provisions.
Energy Efficiency Requirements of the NCC
The aim of NCC is to use less energy for heating, cooling, ventilation, lighting and other services used by buildings which require the use of energy. To be energy efficient means to work towards improving systems that directly consume energy including lighting, air-conditioning and heating. This also includes working towards maintaining a greater level of control regarding the way heat flows in and out of the building's fabric.
The energy efficiency requirements also take into account the following:
- Part J1 - The building's fabric performance
- Part J2 - External glazing and shading
- Part J3 - Sealing of the building
- Part J5 - Heating, ventilation and air-conditioning systems
- Part J6 - Performance of artificial lighting
- Part J7 - Heated water supply system for heating and pumping of swimming pools and spas
- Part J8 - facilities used to monitor energy use.
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