High performance facades: Making a business case
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High Performance Facades: Making a business case
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Transcript of High performance facades: Making a business case
High Performance Facades:Making a business case
Does a better façade mean we can reduce the cost of mechanical plant?
Is a high performance façade a good investment?
Why are we underinvestingin building façades?
Seven17 Bourke Street, Australia
AURECON ON HIGH PERFORMANCE FACADES
What matters to building developers?
• Reduced CAPEX• Increased property values• Increased rental rates• Market differentiation• Reduced outgoings
Poor building performance risks devaluating building assets
“New laws demanding mandatory disclosure of energy efficiency ratings have outed the worst-performing offices in the country, with some of the nation’s largest landlords responsible for building with zero star NABERS Energy ratings.
The Commercial Building Disclosure website is part of a national program that kicked off in November last year, where sellers and lessors office space of 2000 square metres or more are required to obtain and disclose an up-to-date NABERS rating.
Big players, including Brookfield, Multiplex, Charter Hall, GE Real Estate Investments Australia and Becton Property Group, come up on the website as owners of some of the least-efficient buildings in Australia.”
Source: Financial Review, March 24 2011 http://www.afr.com/real-estate/commercial/investment/worstperforming-offices-revealed-20110324-ij37r
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Building performance matters to your guests and clients
An example of how real-time building performance can be displayed within buildings.
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Green Star Rating impact on commercial office building returns
Almost a increase in returns for Green Star Office buildings
The Property Council/IPD – December 2014
3%
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NABERS energy impact on commercial office building returns
The Property Council/IPD – December 2014
increase in returns for NABERS Energy ratings 4-6 Stars
1.8%
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Increasing focus on how buildings can enhance health and wellbeing
The WELL Building Standard® is an evidence-based system for measuring, certifying, and monitoring the performance of building features that impact health and wellbeing
AURECON ON HIGH PERFORMANCE FACADES
A poor façade can undermine building performance
AURECON ON HIGH PERFORMANCE FACADES
Investigate façade performance early using rapid modelling tools
Early stage modelling means we can drive better decision making around façade performance…
Rather than verifying poor designs after they are locked in…
AURECON ON HIGH PERFORMANCE FACADES
Promising developments in early stage modelling tools
Sefaira
Formit 360
Green Building Studio
InEnergy
Optimisation software allows rapid assessment of design options
BeOPT DesignBuilder
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A better façade can mean $ saved on the mechanical plant
Case Study:The Building• New 7 story office
building• 9,300 m2 NLA• Large exposed
western façade• Chilled Water VAV
Metropolitan Fire Brigade –Burnley Complex, Australia
If we improve the western façade performance can we downsize the mechanical plant?
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Early stage modelling was done using Safeira
Metropolitan Fire Brigade –Burnley Complex, Australia
AURECON ON HIGH PERFORMANCE FACADES
Energy load visualisation
Metropolitan Fire Brigade –Burnley Complex, Australia
AURECON ON HIGH PERFORMANCE FACADES
Cloud based modelling speeds up comparison of design options
Metropolitan Fire Brigade –Burnley Complex, Australia
AURECON ON HIGH PERFORMANCE FACADES
Response curves show link between mechanical and façade systems
Metropolitan Fire Brigade –Burnley Complex, Australia
Performance measures:
• Reduced window to wall ratio
• Improved window U-values and lower SHGC
• Exterior horizontal shade
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Results
Metropolitan Fire Brigade –Burnley Complex, Australia
Improved western façade performance provides:
• 10% Reduction in cooling capacity (192kW)• 2% Increase in heating capacity• 3% Reduction in electrical energy use• 19% Reduction in gas use
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Cost impacts
Metropolitan Fire Brigade –Burnley Complex, Australia
ImpactCOST OF IMPROVED WESTERN FACADEImproved glazing $64K - $87KHorizontal Shading (60m@400mm) $18K
Total: $82K - $105KREDUCED COST OF MECHANICAL PLANTReduction in cooling capacity $50KReduced riser space $30K
Total: $80KANNUAL ENERGY SAVINGS $5.6KANNUAL RENTAL VALUE OF ADDITIONAL NLA $2K
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Bottom line and benefits
• Net Capital Cost of $2K - $25K
• Assume worst case of $25K CAPEX
• NPV of $46K over 15 years
• IRR of 30%
Other benefits not included:• Reduction in plant room space• Reduction in cost of opaque façade versus glazed• Reduced HVAC maintenance• Reduced window cleaning• Reduced peak load electricity costs• Improved productivity due to reduced glare and
heat gain• Availability of views and daylight due to reduced
use of blinds• Higher rental rates due to improved space quality
and better ratings
AURECON ON HIGH PERFORMANCE FACADES
Takeaways• Good facades are a terrific
investment• Early stage modelling tools will
drive design rather than validate design
• Better tools mean will open up design team engagement
• We need to translate façade performance into financial terms
• We need more accessible and robust costing assumptions
Faculty of Engineering and Information Technology, UTS, Australia
