Estidama Pearl Villa Rating System 1 - … · power and lighting. ... Estidama Pearl Villa Rating...

Low Energy – Low Carbon Buildings

First Issue July 2015

Estidama Pearl Villa Rating System 1.0WHAT CREDIT POINTS CAN KINGSPAN PRODUCTS ACHIEVE?

Insulation

United Arab Emirates

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Estidama Pearl Villa Rating System

IntroductionEstidama, created by Abu Dhabi Urban Planning Council, was the first sustainable building program tailored to the Middle East construction market to be created and enforced. The program is aimed to influence the design and construction of all new buildings in the emirate of Abu Dhabi. Estidama is driven by its four pillars: environment; economy; social; and culture. These four pillars steer the program. In order to enforce the pillars of Estidama, three Pearl Rating Systems were created: Pearl Community Rating System; Pearl Building Rating System; and Pearl Villa Rating System. This document will focus on the Pearl Villa Rating System. Within the Pearl Villa Rating System, credit points are awarded in seven sections according to performance. These credit points are then added together to produce a single overall score on a scale of 1 Pearl, 2 Pearl, 3 Pearl, 4 Pearl or 5 Pearl, with 5 Pearl being the highest score.

The process of determining a Pearl Villa Rating is outlined below.

1. Check that the non-creditable mandatory requirements have been achieved in all sections.

2. If any of the non-creditable mandatory requirements are not met, then a zero rating will result, regardless of the credit points achieved.

3. For each Pearl Villa Rating section a number of credit points are available.

4. The total number of credit points achieved are added together to give the overall Pearl Rating.

5. The relevant Pearl Rating (i.e. 1 Pearl, 2 Pearl, 3 Pearl, 4 Pearl or 5 Pearl) is achieved based on the overall score. The Pearl Villa Rating is calculated using the below methodology.

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5

10

18

15

21

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Innovating Practice Resourceful Energy

Integrated Development Process Precious Water

Natural Systems Stewarding Materials

Livable Villas

Each of the seven sections of which the Pearl Villa Rating System comprises is broken up into subsections and these are shown below:

� Integrated Development Process (ISP-R1 - IDP-R2, IDP-1 IDP-4);

� Natural System (NS-R1, NS-1 - NS-2);

� Livable Villas (LV-R1 - LV-R3, LB-1 - LV-9);

� Precious Water (PW-R1 – PW-R2, PW-1 – PW-3);

� Resourceful Energy (RE-R1 – RE-R3, RE-1 – RE – 3);

� Stewarding Materials (SM-R1 – SM-R3, SM-1 – SM-8); and

� Innovating Practice (IP-1 – IP-2).

NB. Where the letter ‘R’ is placed before a number, this section is a mandatory requirement.

Only two of these sections, Resourceful Energy and Stewarding Materials, offer credit points related directly to thermal insulation products. The relevant subsections are RE-R1, RE-2 and SM-1.

Credit Points Achieve Pearl Rating

All Mandatory Credit Points 1 Pearl

All Mandatory Credit Points + 30 Credit Points 2 Pearl




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RE-R1 – Minimum Energy PerformanceThis section is a mandatory requirement with no available credit points. RE-R1 recognises the use of thermal insulation and the positive impact this can have on the energy performance of a villa. As such, it offers a prescriptive method of compliance whereby the mandatory requirement for building envelope performance is achieved by meeting the following area weighted U-values as a minimum.

RE-1 – Improved Energy PerformanceUp to 7 credit points are available based on further improvements to the energy consumption of the proposed villa, using a building performance methodology. The number of credit points achieved is determined by comparing the proposed villa’s energy performance with the minimum energy performance outlined in RE-R1. This can be done by using a building energy model to simulate the energy consumption of the proposed villa against the energy consumption of the baseline villa (see section RE-R1). For each villa, the percentage improvement of energy performance is calculated by the formula below.

Credit points are awarded based on the percentage improvement as detailed in the table below.

Kingspan’s insulation products can easily achieve the minimum energy performance requirements by using the solutions listed on pages 5-8.

Clearly, thermal insulation and ductwork air-tightness are two of the most effective ways to reduce a villa’s operational energy demand, energy consumption and CO2 emissions. Insulation and air-tight ductwork do not achieve any specific credit points under this Pearl Rating subsection, but their use can contribute enormously to the achievement of the available credit points.

Element Value

All Roofs 0.14 W/m2.K

Walls 0.32 W/m2.K

Basement Walls 0.28 W/m2.K

Floors 0.15 W/m2.K

Table 1: Selected Reference Values from the The Pearl Villa Rating System for Estidama

Percentage improvement =

100 x (Baseline Building Performance (kWh/yr) – Proposed Building Performance (kWh/yr)

Baseline Building Performance (kWh/yr))

Credit Points Percentage Reduction (kWh/yr)

1 5%

2 10%

3 15%

4 20%

5 25%

6 30%

7 40%


As an alternative, a whole building performance method of calculation is available to prove compliance. This route requires a building energy model to simulate the energy performance of the villa, and thus, the annual energy cost that would be incurred. Firstly, the energy performance of a villa of the same specification (e.g. size, layout, orientation), built using the prescriptive method, should be modeled. This is known as the baseline building energy performance.

The calculations should take account of the performance of the building envelope, HVAC systems, service water heating, power and lighting. The annual energy cost should then be calculated using the method prescribed in ASHRAE 90.2: 2007 - Section 8.The building energy performance and annual energy cost of the proposed villa must, at a minimum, match this baseline building energy performance to comply with the minimum energy performance required.

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Estidama Pearl Villa Rating System

RE-2 – Cool Building StrategiesRE-2 concentrates on passive cooling strategies and encourages design that will reduce the external heat gain of the villa, without using mechanical systems to do so. RE-2 recognises the use of thermal insulation and the positive impact this can have on the required annual cooling of a villa. As such, it offers a prescriptive method of compliance whereby 1 credit point is available for achieving all of the following area weighted U-values as a minimum.

Kingspan’s insulation products can easily achieve the U-value requirements for Cool Building Strategies by using the solutions listed on pages 5-8.

Element Value

All Roofs 0.12 W/m2.K

Walls 0.29 W/m2.K

Basement Walls 0.26 W/m2.K

Floors 0.14 W/m2.K


The above U-values are represented as an improvement on the minimum energy performance requirements stipulated in RE-R1.

A building performance methodology for obtaining credit points is also available. Up to 5 credit points are available based on reductions in the annual external heat gain of the villa. The number of credit points achieved is determined by comparing the villa’s annual external heat gain with that prescribed within the minimum energy performance outlined in RE-R1. This can be done by using a building energy model to simulate the annual external heat gain of the proposed villa against the annual external heat gain of the baseline villa (see section RE-R1). External heat gain is defined as the sum of solar gain, external conduction gain and infiltration gain. For each villa, the percentage improvement in annual external heat gain is calculated by a building energy model using the formula below.

Credit points are awarded based on the percentage improvement as detailed in the table below.

Clearly, thermal insulation is one of the most effective ways to decrease a villa’s annual external heat gain. Insulation does not achieve any specific credit points under this Pearl Rating subsection, but its use can contribute enormously to the achievement of the available credit points. It’s contribution may be seen through U-value improvement and decreased thermal bridging.

Credit Points Percentage Reduction (kWh/yr)

1 10%

2 20%

3 30%

4 40%

5 50%


Percentage improvement =

100 x (Baseline Building External Heat Gain (kWh/m2) – Proposed Building External Heat Gain (kWh/m2))

Baseline Building External Heat Gain (kWh/m2)

NB. Linear thermal bridging describes the heat gain or loss at junctions between elements, where the geometry of the junction means that a building’s primary insulation layer is not continuous or is reduced. This heat loss is represented by the junction’s psi (ψ) value.

SM-1 – Stewarding Materials1 credit point is available if all thermal insulation materials used in the villa have an Ozone Depletion Potential of Zero (ODP=0) and a Global Warming Potential of less than 5 (GWP ≤ 5). This includes all blowing agents used in the manufacture of the insulation, but also, all those used to spray it in place, if required.

Kingspan KoolDuctTM Panels, Kingspan PalDuct Hydro Panels, all products in the Kingspan KoolthermTM Range, the Kingspan ThermaTM range and the Kingspan StyrozoneTM N-range and are manufactured with blowing agents that are deemed to have, or have, a zero Ozone Depletion Potential (ODP) and a Global Warming Potential (GWP) < 5.

When calculating the annual external heat gain, the following elements of each villa should be taken into account:

� the orientation;

� the glazing ratio - including both vertical fenestration and skylights;

� glazing solar heat gain coefficients (SHGC);

� external shading;

� building air-leakage rate; and

� envelope conductive performance.

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Typical Roof Constructions

Flat Roof – Concrete Deck with Ceiling Tiles

Insulation Thicknesses to Achieve Different U-values

U-value (W/m2.K)

0.14 0.12

Insulation Material Insulation Thickness (mm)

Kingspan ThermaroofTM

TR27 LPC/FM150 170

Kingspan ThermaroofTM

TR26 LPC/FM150 170

Kingspan ThermataperTM

Systems

150 mm Average Thickness

170 mm Average Thickness

KingspanRoofing System & Kingspan ThermaroofTM TR27 LPC/FM (Overlay)*

65 + 25 75 + 25

KingspanBalcony System & Kingspan ThermaroofTM TR27 LPC/FM (Overlay)*

65 + 25 75 + 25

NB These calculations assume that insulation boards are fully bonded to the vapour control layer. Where multiple layers of insulation of different thicknesses are shown, the second thickness is the overlay board. Where multiple layers of insulation of different thicknesses are shown, the second thickness is the outer layer.

* the bridging effect of Kingspan fix and Kingspan flex components of the System is taken as 30%.

NB These calculations assume that insulation boards are fully bonded to the vapour control layer. Where multiple layers of insulation of different thicknesses are shown, the second thickness is the overlay board. Where multiple layers of insulation of different thicknesses are shown, the second thickness is the outer layer.

Kingspan KoolthermTM K5 External Wall Board taken up

as high as the external wall

Damp ProofCourse (DPC)

Insulation upstandmin. 300 mm

from bottom of surface of horizontal

insulation

Waterproofing e.g. single ply

non-bituminous membrane

Vapour Control Layer

50 mm screedto falls

150 mm Concrete Deck

Kingspan ThermaroofTM TR27 LPC/FM

Promenade Concrete Tile

Screed Bedding

Separating Layer

Kingspan Insulation recently assisted Abu Dhabi Urban Planning Council, at Cityscape Exhibition 2015, teaching residents of the emirate about the benefits of insulation. Calculations, conducted by Abu Dhabi Urban Planning Council, concluded that using 150 mm of Kingspan Thermaroof TM TR27 LPC/FM can reduce heat transfer through the roof by 90%. Using the same methodology, calculations, conducted by Abu Dhabi Urban Planning Council, concluded that using just 80 mm (60 + 25 mm) of the Kingspan Roofing System could also reduce heat transfer by 90%.

Solid Blockwork Wall Cavity Wall

Typical Wall Constructions


U-value (W/m2.K)

0.32 0.29


Kingspan KoolthermTM

K5 External WallBoard

55 60

Kingspan External Wall System*

30 35


U-value (W/m2.K)

0.32 0.29



K8 Cavity Board 45 50

* the bridging effect of Kingspan fix and Kingspan flex components of the System is taken as 30%.

NB When calculating U–values to BS EN ISO 6946: 2007, the type of mechanical fixing used may change the thickness of insulation required. These calculations assume the use of stainless steel fasteners of cross sectional area 7.44 mm2 is assumed at a density of 4.4 per m2. These calculations also assume thermally broken fasteners with a thermal conductivity 1.00 W/m·K or less, the effect of which is insignificant, for the fixing of the Kingspan fix and Kingspan flex components of the Kingspan External Wall System.

NB When calculating U–values to BS EN ISO 6946: 2007, the type of wall tie used may change the thickness of insulation required. For 50 mm cavity widths, calculations assume a stainless steel flexible tie with 2.5 ties per m2 and a cross–sectional area of 12.50 mm2.

*Calculations assume dense block outer and inner leaf of λ–value (1.13 W/m·K).

13 mm Dense Plaster

Bedding compound (render system only)

Kingspan KoolthermTM K5 External Wall Board

Render system incorporating EML

or glass fibre mesh (alternative cladding system)

Mechanical fixings (render system only)

Calculations conducted by Abu Dhabi Urban Planing Council concluded that using just 60 mm of Kingspan KoolthermTM K5 External Wall Board can reduce heat transfer by 84%.

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Kingspan KoolthermTM K8 Cavity Board

Residual cavity (see ‘Design Considerations’)

Double drip type wall tie and retaining clip

(BBA Approved)

Inner leaf blockwork*

Kingspan KoolthermTM K3 Floorboard

20 mm rendered 100 mm dense block outer leaf*

Damp proof course

Insulation overlap min. 150 mm from bottom of

wall insulation to top of floor insulation upstand

Cladding on Blockwork Basement Wall


U-value (W/m2.K)

0.32 0.29



K15 Cladding Board 65 75

Kingspan Cladding System* 35 40


U-value (W/m2.K)

0.28 0.26


Kingspan StyrozoneTM

N 300 R 60 60

* the bridging effect of Kingspan fix and Kingspan flex the bridging effect of Kingspan fix and Kingspan flex components of the System is taken as 30%.

NB When calculating U–values to BS EN ISO 6946: 2007, the type of discrete ‘helping hand’ bracket may change the thickness of insulation required. These calculations also assume thermally broken fasteners with a thermal conductivity 1.00 W/m·K or less, the effect of which is insignificant, for the fixing of the Kingspan fix and Kingspan flex components of the Kingspan External Wall System.

NB For the purposes of these calculations, using the method as detailed in BS / I.S. EN ISO 13370: 2007, the soil has been assumed to be sand or gravel, the wall insulation is assumed to overlap the floor insulation by minimum 150 mm, and the standard of workmanship has been assumed good and therefore the correction factor for air gaps has been ignored. The P/A ratio is taken as 0.5.

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Non−combustible substrate – structural masonry wall

Tanking membrane

Drainage membrane

65 mm floor screed

Separation layer

Damp proof membraneeither above or below

Kingspan StyrozoneTM N 300 RTriangular piece ofKingspan StyrozoneTM N 300 R

Geotextile membrane


K15 Cladding Board


K8 Cladding Board

Kingspan StyrozoneTM

N 300 R

Discrete Fixing Bracket

Proprietary fixing rail

Cladding panel

Soffit – Concrete SlabGround Floor – Solid Concrete with Insulation above Floor Slab

Typical Floor Constructions


U-value (W/m2.K)

0.15 0.14



K10 Soffit Board 125 135

NB When calculating U–values to BS EN ISO 6946: 2007, the type of fixing used may change the thickness of insulation required. These calculations assume the use of thermally broken fasteners with a thermal conductivity of 1.00 W/m·K or less, the effect of which is insignificant.


U-value (W/m2.K)

0.15 0.14


Kingspan Flooring System 50 55


K3 Floor Board 105 110

* the bridging effect of Kingspan fix and Kingspan flex * the bridging effect of KingspanOPTIM-R fix and Kingspan optim-r flex components of the System is taken as 15%.

NB For the purposes of these calculations, using the method as detailed in BS EN ISO 13370: 1998, the soil has been assumed to be sand or gravel, and the wall insulation is assumed to overlap the floor insulation by minimum 150 mm. The P/A ratio is taken as 0.5.

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Kingspan KoolthermTM K10 FM Soffit Board

Concrete wall

Floor screed

Hardcore

Concrete slab

Concrete floor

Separation layer

Protection layer

Kingspan

HVAC DuctworkPre-insulated ductwork can produce ductwork where the air-leakage rate can be reduced to a fraction of that typical of sheet metal ductwork. A low-air leakage rate can yield significant electrical consumption savings, because of reduced heating and cooling loads, and reduced fan energy usage.

Kingspan PalDuct Hydro Panel, used in the fabrication of the Kingspan PalDuct Hydro System of pre-insulated ductwork

Specifying the best ductwork air-leakage standards possible can be a relatively simple, yet inexpensive, step to take toward reducing the overall operational energy use of a building.

The Kingspan KoolDuctTM System of pre-insulated ductwork

River Levett Bucknall carried out a further review of the implications of reduced fan power, this time on fan size and capital cost. the conclusion was that an 11.6% reduction in the size of the fan could be achieved, yielding a 10% capital cost saving.

Therefore, using an HVAC ductwork system with a low air-leakage rate can have a positive impact on the energy performance of a building. This will contribute towards credit points within the Improved Energy Performance - RE-1 - section of the Pearl Villa Rating System.

Pre-insulated HVAC ductwork systems such as The Kingspan KoolDuctTM System or Kingspan PalDuct Systems, can help towards reducing the energy usage of a building.

Tiger Clip CouplingSystem

Volume Control Damper

Pre-insulated Circular Duct

Kingspan KoolDuct® System Plenum Box

Tiger Support & Wire Hanger System

Aluminium Grip Flange Coupling System

Channel Support & Threaded Rods

Access Panel

Fire Damper Unit

4-bolt Flange Coupling System

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Kingspan Insulation commissioned a review, by independent testing and research organisation BRSIA, of the implication of ductwork specification and different ductwork air-leakage rates on energy consumption.

The methodology given in BSRIA’s report was used to compare a 100 m / 328 ft long run of ductwork fabricated from The Kingspan KoolDuctTM System, with a 100 m / 328 ft long run of galvanised sheet steel ductwork. Both runs had a cross sectional internal dimensions of 600 x 600 mm / 24” x 24”.

BSRIA’s methodology demonstrated that ductwork fabricated from The Kingspan KoolDuctTM System can save 31% of the energy, and thus cost, required to run a fan in an HVAC system with a typical design flow rate of 7.5m/s / 1475 fpm. This saving can be even greater for lower design flow rates.

TM Kingspan, KoolDuct, Kooltherm, OPTIM-R, Styrozone, Therma, Thermaroof, Thermataper, the Pal Device and the Lion Device are Trademarks of the Kingspan Group plc.

PAL Middle East PIR LLCP.O. Box 113826, Dubai Investment Park 2, Dubai, U.A.E.

Tel: +971 4 889 1000 Fax: +971 4 883 8515 [email protected]

www.kingspaninsulation.com

PAL Middle East PIR LLC believes the information and recommendations herein to be accurate and reliable. However, since use conditions are not within its control, PAL Middle East PIR LLC does not guarantee results from use of such products or other information herein and disclaims all liability from any resulting damage or loss. No warranty, express or implied, is given as to the merchantability, fitness for particular purpose, or otherwise with respect to the products referred to.

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