There are two compliance routes for energy performance in buildings. The standard method is referred to as the Elemental Method; the alternative method is referred to as the Performance Method.
a) Elemental Method: All buildings must comply with each of these regulations.
b) Performance Method: Alternatively, a calculation method may be employed for a building which may not comply with all the elemental requirements of those Articles listed in Table 102.2 (1).

The Performance Method, using a calculation tool such as dynamic thermal modelling, must compare the annual energy consumption of the proposed building with that of a reference building which meets all the elemental requirements listed in Table 102.2 (1). The reference building must be equal in shape, size and operational patterns to the proposed building.

Compliance with the Green Building regulations will be demonstrated if the annual energy consumption of the proposed building is equal to or lower than the annual energy consumption of the reference building.

Table 10.02 (1) Green Buildings Regulations for Elemental Method of Energy
Compliance
304.04 Orientation of Glazed Facades
501.01 Minimum Envelope Performance Requirements
502.01 Energy Efficiency– HVAC Equipment and Systems
502.04 Lighting Power Density – Interior

304.04 Orientation of Glazed Façades

For new buildings, other than villas and industrial buildings, one of the following must be achieved:
1. At least fifty percent (50%) of the total glazed surface area of the building, (excluding glazed areas with back insulated panels), must have a north orientation which includes 150 degree angle started from east toward North West.
2. South and west glazed areas, excluding glazed areas with back insulated panels, must be treated environmentally.

501.01 Minimum Envelope Performance Requirements

For all new air conditioned buildings, exterior building elements must have average thermal transmittance (also known as U Value) and Shading Coefficients
(SC) that does not exceed the values specified and Light Transmittance greater than or equal to the values specified.

A. External Walls, Roofs, and Floors: Building elements forming the external walls, roofs, and floors (where one side of the floor is exposed to ambient conditions) must have an average thermal transmittance (U Value) which does not exceed the following values:

  • Roof U= 0.3 W/m2K
  • External Wall U= 0.57 W/m2K

If the floor is in contact with the ground, the insulation should only be applied to one meter (1m) in from the perimeter of the building.

Glazed elements with back insulated panels must be treated as walls (and therefore must meet the performance requirement for walls).

B. Glazed Elements – Fenestration:

SN Condition Thermal Transmittance (Summer U value) Shading Coefficient (SC) Light Transmittance
1 Total area of external walls that let in light is forty per cent (40%) or less of the external wall area U= 2.1 W/m2K (max) 0.4 (max) 0.25 (min)
2 Total area of external walls that let in light is between forty percent (40%) and sixty percent (60%) of the external wall area U= 1.9 W/m2K (max) 0.32 (max) 0.1 (min)
3 Total area of external walls that let in light is sixty percent (60%) or greater of the external wall area U= 1.9 W/m2K (max) 0.25 (max) 0.1 (min)
4 Shopfronts and showrooms, other than those at ground floor level U= 1.9 W/m2K (max) 0.76 (max)
5 Glazing portion of a roof is ten percent (10%) or less of the roof area U= 1.9 W/m2K (max) 0.32 (max) 0.4 (min)
6 Glazing portion of a roof is greater than ten percent (10%) of the roof area U= 1.9 W/m2K (max) 0.25 (max) 0.3 (min)

502.01 Energy Efficiency – HVAC Equipment and Systems

For all new air conditioned buildings, heating, ventilating and air conditioning equipment and systems must comply with the minimum energy efficiency requirements and test procedures listed in Reference Tables 502.01(1) and 502.01(2) or any test procedure approved by Dubai Municipality.

Table 502.01 (1) Minimum Efficiency Requirements for Unitary Air Conditioners and Condensing Units

Equipment Type Size Category Heating Section
Type
Subcategory or Rating Condition Minimum
Efficiency (T1/T3)
Minimum Efficiency (T3)
Air Conditioners, air cooled <65,000 Btu/h All Spilt System 9.5 EER/6.6 EER T1-ARI 210/240
T3-ISO 5151
Air Conditioners, air cooled <65,000 Btu/h All Single Package 9.5 EER/6.6 EER T1-ARI 210/240
T3-ISO 5151
Through-the-wall, air cooled <=30,000 Bth/h All Single Package 8.0 EER/5.7 EER T1-ARI 210/240
T3-ISO 5151
Small-duct high-
velocity air cooled
<65,000
Bth/h
All Split System 9.2 EER/6.4 EER T1-ARI 210/240
T3-ISO 5151
Air Conditioners,
air cooled
≥65,000 Btu/h
and <135,000 Btu/h
Electric resistance (or none) Split System and
Single Package
9.5 EER/6.6 EER T1-ARI 340/360
T3-ISO 5151
Air Conditioners,
air cooled
≥65,000 Btu/h
and <135,000 Btu/h
All Other Split System and
Single Package
9.5 EER/6.6 EER T1-ARI 340/360
T3-ISO 5151
Air Conditioners,
air cooled
≥135,000 Btu/h
and <240,000 Btu/h
Electric resistance (or none) Split System and
Single Package
9.5 EER/6.6 EER T1-ARI 340/360
T3-ISO 5151
Air Conditioners,
air cooled
≥135,000 Btu/h
and <240,000 Btu/h
All Other Split System and
Single Package
9.5 EER/6.6 EER T1-ARI 340/360
T3-ISO 5151
Air Conditioners,
air cooled
≥240,000 Btu/h
and <760,000 Btu/h
Electric resistance (or none) Split System and
Single Package
9.5 EER/6.6 EER T1-ARI 340/360
T3-ISO 5151
Air Conditioners,
air cooled
≥240,000 Btu/h
and <760,000 Btu/h
All Other Split System and
Single Package
9.5 EER/6.6 EER T1-ARI 340/360
T3-ISO 5151
Air Conditioners,
air cooled
≥760,000 Btu/h Electric resistance (or none) Split System and
Single Package
9.0 EER/6.3EER T1-ARI 340/360
T3-ISO 5151
Air Conditioners,
air cooled
≥760,000 Btu/h All Other Split System and
Single Package
9.0 EER/6.3EER T1-ARI 340/360
T3-ISO 5151
Air conditioners, water and
evaporatively cooled
<65,000 Btu/h All other Split System and
Single Package
14.0 EER ARI 210/240
Air conditioners, water and
evaporatively cooled
≥65,000 Btu/h
and <135,000 Btu/h
Electric resistance (or none) Split System and
Single Package
14.0 EER ARI 340/260
Air conditioners, water and
evaporatively cooled
≥65,000 Btu/h
and <135,000
Btu/h
All other Split System and
Single Package
14.0 EER ARI 340/260
Air conditioners, water and
evaporatively cooled
≥135,000 Btu/h
and <240,000 Btu/h
Electric resistance (or none) Split System and
Single Package
14.0 EER ARI 340/260
Air conditioners, water and
evaporatively cooled
≥135,000 Btu/h and
<240,000 Btu/h
All other Split System and
Single Package
14.0 EER ARI 340/260
Air conditioners, water and
evaporatively cooled
≥240,000 Btu/h Electric resistance (or none) Split System and
Single Package
14.0 EER
12.4 PLV
ARI 340/260
Air conditioners, water and
evaporatively cooled
≥240,000 Btu/h All other Split System and
Single Package
14.0 EER ARI 340/260
Condensing units, air cooled ≥135,000 Btu/h 11.5 EER/7.8EER T1- ARI365
T3- ISO5151

a) Integrated Part Load Values (IPLVs) and part rating conditions are only applicable to equipment with capacity modulation.
b) Test Procedure (T3) in accordance with ISO5151

Table 502.01 (2) Water Chilling Packages – Minimum Efficiency Requirements

Equipment Type Size Category Minimum Efficiency (T1) Minimum Efficiency (T3) Test Procedure
Air cooled, with condenser,
electrically operated
All Capacities 2.8 COP
3.05 IPLV
1.9 COP T1- ARI 210/240
Air cooled, without condenser, electrically
operated
All Capacities 3.1 COP
3.45 IPLV
2.1 COP T1- ARI 210/240
Water cooled, electrically operated, positive displacement
(reciprocating)
All Capacities 4.2 COP
5.05 IPLV
2.75 COP T1 – ARI 550/590
T3-ISO 5151
Water cooled, electrically operated, positive displacement (rotary screw
and scroll)
<150 tons 4.45 COP 2.9 COP T1 – ARI 550/590
T3-ISO 5151
Water cooled, electrically operated, positive displacement (rotary screw and scroll) >=150 tons and <300 tons 4.9 COP 3.2 COP T1 – ARI 550/590
T3-ISO 5151
Water cooled, electrically operated, positive displacement (rotary screw
and scroll)
>= 300 tons 5.6 COP 3.6 COP T1 – ARI 550/590
T3-ISO 5151
Water cooled, electrically operated, centrifugal <150 tons 6.0 COP ARI 550/590
Water cooled, electrically operated, centrifugal >=150 tons and <300 tons 6.5 COP
7.1 IPLV
ARI 550/590
Water cooled, electrically operated, centrifugal >= 300 tons 6.5 COP
7.68 IPLV
ARI 550/590
Air-cooled absorption single effect All Capacities 0.7 COP ARI 560
Water-cooled absorption single effect All Capacities 0.7 COP ARI 560
Absorption double effect, indirect-fired All Capacities 1.1 COP
1.1 IPLV
ARI 560
Absorption double effect, direct-fired All Capacities 1.2 COP
1.2 IPLV
ARI 560

* The chiller equipment requirements applies to all chillers, including where the design leaving fluid temperature is <4.5°C.

502.04 Lighting Power Density – Interior

For new buildings, the average Lighting Power Density for the interior connected lighting load for specific building types must be no more than the watts per square metre of gross floor area given in Table 502.04 (1).

Table 502.04(1) – Interior Lighting Power Density

Building Type Maximum average Watts per square metre (W/m2) across total building area
Commercial/Public: Offices, Hotels, Resorts, Restaurants 10
Educational Facilities 12
Manufacturing Facility 13
Retail Outlets, Shopping Malls , Workshop 14
Warehouses 8

Lighting Power Densities for building types not listed in Table 502.04 (1) should be no greater than those values given in ASHRAE 90.1-2007 Table 9.5.1.or equivalent as approved by DEWA.