December 2 nd 2020
Thermal imaging • get free training • borrow a camera • find thermal leaks See your home in a new light: • understand thermal problems and fix them • improve comfort • cut bills & carbon emissions
IR Thermometer Thermal Camera 1 160 pixels £20-£60 £500-£5,000 Both measure apparent surface temperatures show thermal effects of deeper structures
Interpreting Building images: • insulation problems • draughts • heating systems • Electrics • damp
Ideal Conditions for Use • Indoors >10°C warmer than out • Enough light for visible images • No direct sun, rain or strong winds
Uses of Cameras: Insulation Problems Looking up at top-floor ceiling From inside: blue,cold = leaky Loft insulation missing or thin Poorly insulated loft hatch 5, 7 °C difference is significant
Cold Bridge - something conductive through the insulation Front Door Stone Threshold : Cold Bridge Hall Carpet
Draughts Cold draught under door Typical feathery edge
Normal radiator What’s wrong? Air in top of radiator
Electrics TiR Charger
Using the TI Cameras YouTube videos: TiR TiR105
Using the TI Cameras – Key Points START • Hold power button, beep, lens cap CHECKS • Battery: top-left of screen. Charge socket under flap • File format: check via menus & select jpg or bmp • Picture-in-picture: thermal & visible? via IR-Fusion menu IMAGES • Focus: TiR with ring by lens, TiR105 fixed, ok if >4ft • Take a picture: pull trigger AND confirm to save it • Copy from SD card, IMAGES\TI to PC. USB adapter if needed
Questions? 1
Auto easy Constantly re-adjusts range to hottest and coldest temperatures in view Colour / Temperature scale changes Manual Useful for comparisons & if there are temperature extremes in view locks the current temp range • Point camera away from temp extremes • Switch to manual : hold F1 >½ sec • F3 rescales to hottest & coldest in view Back to Auto : hold F1 >½ sec
Using Manual Range YouTube Video
Auto / Manual – Key Points • Auto always adjusts range to hottest and coldest in view • If these include temperature extremes, try Manual : • Holding F1 switches Auto <-> Manual • F3 rescales manual range to temperatures then in view
Emissivity, ε Recently-boiled stainless steel kettle How much a surface radiates IR, as expected for its temperature Most building surfaces : brick, wood, paint: ε ≈ 0.95 But bare metal ε ≈ 0.2 - 0.5 ( & reflective ) concrete ε≈ 0.54 expect a wrong temperature: 32.4°C because of low emissivity and reflections, if shiny: glass too Stick on PVC electrical tape to measure ‘real’ temperature : 95.0°C
Gotchas 1 From outside: Hot = leaky Loft Insulation: poor - warm Wall insulation good -cool Reflections in glass:
Gotchas 2 Shiny metal Temperature errors Refections
Gotchas 3 Why are the houses so different? Different Internal Temperatures?
Gotchas 4 Hot because of sun , not heat leakage from house Sun, rain, snow, wind & thermal mass: effects can linger
What Problems? Draughty windows Radiator inside without reflective foil
Questions? 2
Booking a camera & Covid safety
Questions? 3
Events Cambridge Climate Change Charter – Mass Sign up Day December 12 2020 December 12 marks five years since the signing of the Paris Climate Agreement. To mark the day we're encouraging a mass sign up to the Cambridge Climate Change Charter. From Ambition to Action January & February 2021 3 seminars providing practical guidance to Cambridge businesses and organisations on embedding sustainability into their business model.
Events More Online Thermal Imaging Training Thu 14 th Jan, 7.30-9.00pm Tue 23 rd Feb, 6.00-7.30pm
Other links & resources More information & booking www.cambridgecarbonfootprint.org/what-we-do/events Book a camera & find thermal imaging resources www.cambridgecarbonfootprint.org/what-we-do/thermal-imaging Calculate your carbon footprint & take action on climate change www.cambridgecarbonfootprint.org/charter Support local climate change action & future CCF events www.cambridgecarbonfootprint.org/donate
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