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DT117/4 Sustainable Build & Design - Class Presentations
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Thermal Imaging
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A Thermal Imaging Camera makes an image from thousands of surface temperature measurements
The Camera detects ‘thermal’ radiation in the infrared range of the electromagnetic spectrum
The Camera coverts this longer wavelength ‘thermal’ radiation into visual images
How it Works
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Identifies the areas of air leakage/heat loss Shows thermal insulation defects Identifies Cold bridges Condensation Identification Electrical Faults Leak Detection Quality Control during Building Post Construction Survey Pre – Purchasing Survey Can improve previous designs
Applications in Construction
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An instantaneous picture of heat loss allowinga quick assessment of defects
Quick inspection – Rapid Scanning of Large areas
Non Invasive Results are easily shown visually Can be used to show efficacy of heating and
cooling installations Improve design detailing
Benefits of Thermal Imaging
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Medical Science – Tumour Detection Fire Fighting Swine Flu/Disease Detection Bruise Detection in Apples & Fruits Equine Science
Other Uses
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Only Detects Surface Temperatures Differences
Does not quantify heat loss Better if it has a controlled environment Cannot detect sub surface problems Cannot detect moisture levels, just a anomaly Thermal Imaging Camera Costs
Limitations
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Recommend a Air Tightness Test in conjunction with a Thermal Image Survey
Best to carry it out in the Morning – No sunshine on façade for 4 hours
No Rain/Mild Wind Only 10 Degrees Internal/External Temperature
Difference Ideally have the heating on for 2 hours prior
to Survey Access to all Rooms
Domestic Survey
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Examples – Leak Detection
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Air Loss/Infiltration
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Missing Insulation
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Single Problem e.g. Leak - €200 First Hour, €75 per hour after
Thermal Imaging report & photographs with description of findings - €300
Air Tightness Test with & Thermal Image Survey & Report - €450
Figures Based on a 3 Bed Semi-Detached House in Dublin
How Much Does a Survey Cost?
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Any Questions
Thank You
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BRECSU 2000. Post construction testing - a professionals guide to testing housing for energy efficiency. Watford, UK: Building Research Energy Conservation Support Unit.
BSRIA 2002. Thermal imaging of building fabric: a best practice guide for continuous insulation. Berks, UK: The Building Services Research and Information Association.
SWENNY, B. Available: http://www.bscs.ie/pdf/BSCS_Sample_Report.pdf [Accessed 13-March-2010].
WILLIAMS, T. 2009. Thermal Imaging Cameras, New York, Taylor & Francis.
References