Thermal Imaging - iredale.net · 28 March 2012 Home Energy Event Theory Everything radiates...
Transcript of Thermal Imaging - iredale.net · 28 March 2012 Home Energy Event Theory Everything radiates...
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Home Energy Event28 March 2012
Thermal ImagingA Brief Introduction To Surveying A Home
Adam Trickett
Copyright 2012, distributed under a creative commons“Attribution-Non-Commercial-Share-Alike Licence”
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Home Energy Event28 March 2012
Theory● Everything radiates infra-red or thermal energy● The temperature of an object gives you
radiation of a specific frequency● A thermal imaging camera converts these
frequencies back into temperatures● The temperatures are displayed as different
false colours on the display
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Home Energy Event28 March 2012
Inside of a House● Walls and windows
should show up warm
● Cold spots means you have leaking heat
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Home Energy Event28 March 2012
Just a Window
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Home Energy Event28 March 2012
Front Door
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Home Energy Event28 March 2012
Just a Blind
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Home Energy Event28 March 2012
Gap in Curtains
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Home Energy Event28 March 2012
Curtains and Blind
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Home Energy Event28 March 2012
Outside of a House● The house should
show up like its surrounding: cold
● Hot spots mean you have leaking heat
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Home Energy Event28 March 2012
Window and Blind
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Home Energy Event28 March 2012
Front of House
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Home Energy Event28 March 2012
What use is it?● Should tell you nothing new,
but often reveals things you didn't know● May spur people into action● Useful to find where you need to target first● Can help identify gunked up radiators
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Home Energy Event28 March 2012
What We Did● Phase 1
● Held a “Home Energy Evening”● Asked people to sign up for a survey● Spent a fortnight surveying homes in the
evening● Phase 2
● Advert in Parish newsletter● Spent three weeks surveying more homes
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Home Energy Event28 March 2012
What We Found
The survey samples were not a representative
cross section of Overton households.
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Home Energy Event28 March 2012
Roof and Wall● Every roof was insulated and was visibly cooler
on the outside than the walls● Every top floor ceiling was warmer than the
walls● Filled cavity walls insulate better than unfilled
cavity walls● Cavity walls insulate better than solid walls
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Home Energy Event28 March 2012
Roof and Wall● Corners of rooms are noticeable cooler and
prone to damp● Modern houses may have unfilled cavities● Modern houses may have less loft insulation
than people expect● People have boarded lofts or keep junk in them,
even though they know it's inefficient
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Home Energy Event28 March 2012
Cavity Walls
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Home Energy Event28 March 2012
Interior Block Work
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Home Energy Event28 March 2012
Loft Hatches● Most loft hatches were uninsulated or only
partially insulated● They are usually at the highest point in the
house and often at the top of the staircase● Some loft hatches were very large and very cold
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Home Energy Event28 March 2012
Doors● Leaking doors were common
● Thin wood or plastic because of panelling● Poor fit between the frame and door● Draughty letter boxes were the norm
● Modern doors were not consistently good – the metal frame conducts heat very well
● Older period doors often lit up like Christmas Trees
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Home Energy Event28 March 2012
Windows● Double glazing, even secondary works better
than single glazing● Blinds and curtains make a drastic difference
unless you have top of the range double glazing● Even double glazing leaks some heat and older
metal framed double glazing performs poorly
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Home Energy Event28 March 2012
Single and Double
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Home Energy Event28 March 2012
Typical Doors
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Home Energy Event28 March 2012
“Boxing”
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Home Energy Event28 March 2012
Phase 1 v Phase 2● More uptake the second time● More complex to arrange without the evening● Phase 2 houses expand the sample but still a lot
of “done all the right thing houses”.
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Home Energy Event28 March 2012
Thank You
AnyQuestions?
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Home Energy Event28 March 2012
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Home Energy Event28 March 2012
Solar Gain
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Home Energy Event28 March 2012
Halogen v Incandescent
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Home Energy Event28 March 2012
Dimmer Switch
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Home Energy Event28 March 2012
Solid Walls