Real Estate Standards

For OFFICES, new construction or demolition/reconstruction

The EPB requirements to be met will be as follows:

• A net heating requirement less than or equal to 15 kWh per m² per year (five times less than the consumption of a standard office building)
• A net cooling requirement less than or equal to 15 kWh per m² per year (five times less than the consumption of a standard office building)
• Primary energy consumption for heating, cooling, lighting and electrical auxiliaries less than or equal to (95 – 2.5 *min (C; 4)) kWh per m² per year, where C is defined as compactness, i.e. the ratio between the protected volume and the heat loss area (five times less than the consumption of a standard office building)
• An overheating temperature that may not exceed 25°C for more than 5% of the usage period

For all planning permits submitted from January 1, 2018, an additional requirement is planned: air tightness under 50 Pa less than or equal to 0.6 volume per hour.

When the configuration of the tertiary building is unfavorable, namely low solar gains (shading, poor orientation) and/or poor compactness, an automatic exemption regime is implemented. The requirements to be met will be:

A net heating requirement less than or equal to X kWh per m² per year, where the net heating requirement X is calculated with:

• A weighted average of 0.12 W/m²K for opaque walls
• A weighted average of 0.85 W/m²K for all windows and doors
• Air tightness under 50 Pa equal to:

2015	2016	2017	2018
1 vol per hour	0.8 vol per hour	0.7 vol per hour	0.6 vol per hour

• A ventilation system with a default recovery efficiency of 75% and a default good installation setting (mheat,sec i = 1)
• Any other parameter to be encoded is realistic for the case studied

Primary energy consumption for heating, cooling, lighting and electrical auxiliaries less than or equal to (95 – 2.5 *min (C; 4)) + 1.2*(X – 15) kWh per m² per year, where C is defined as compactness, i.e. the ratio between the protected volume and the heat loss area.

For OFFICES, major renovation

In the case of renovation works of at least 75% of the building’s heat loss area including the replacement of all technical installations, the requirements to be met are the same as for new tertiary buildings with the application of a 20% flexibility margin (except for overheating risk). This 20% flexibility margin also applies to the requirements of the exemption regime mentioned above.

	Brussels Capital Region
	today	from July 2, 2011	from Dec 31, 2015
	EPB prog	EPB prog	prog ?
E-level	E90 offices and services	E75 offices and services	passive offices and services and very low energy for renovation
primary energy
K-level	K45 offices and services education

	Walloon Region
	today	from Sept 1, 2011	from 2014	from 2017	from 2019
EPB legal framework	EPB prog	EPB prog	prog ?	prog ?	prog ?
E-level	Ew < 100 office and school buildings	Ew < 80 office buildings	low energy	passive	zero energy
primary energy	Espec 170 kWh/m².year	Espec 130 kWh/m².year or 468 MJ/m²
K-level	K45 offices and services K55 industrial buildings

	Flemish Region
	today	from 2012	from 2014	from 2019
EPB legal framework	EPB prog	EPB prog	EPB prog	prog ?
E-level	E100 office buildings	E70* *not yet voted	E60* E70* *not yet voted	nearly zero energy*
primary energy		Ep max 70 kWh/m².year
K-level	K45 offices and services K55 industrial buildings	K40* *not yet voted

• 15 kWh/m².year heating requirement
• 45 kWh/m².year maximum total primary energy
• 0.6 vol/h for air tightness
• 5% maximum acceptable overheating per year

5 criteria for tertiary

• 15 kWh/m².year heating requirement
• 15 kWh/m².year cooling requirement
• 0.6 vol/h for air tightness
• 5% maximum acceptable overheating per year EN 15 251