Retrotec USACE - Manual (Page 16)

xvi ENERGY & PROCESS ASSESSMENT PROTOCOL
Figure F24. Curtain wall assembly as it interfaces with the roofi ng system.
Figure F25. Infrared thermogram reveals air intrusion at wall-to-roof connection while en-
closure is depressurized.
Figure F26. Exterior façade of commercial facility.
Figure F27. Infrared thermogram showing air leakage at inward corner while enclosure
was pressurized.
Figure F28. Roof detail on a historical renovation of a federal building
Figure F29. Infrared thermogram reveals air leakage at the ballast roof to copper work in-
terface while building was under pressurization.
Figure F30. Electrical and gas utility penetrations in the enclosure
Figure F31. Infrared thermogram reveals air leakage at the electrical penetration while
building was under pressurization.
Appendix G
Figure G1. EPA’s energy performance rating showing the performance of 4,000 buildings
nationwide.
Figure G2. The IR camera converts invisible infrared radiation into a visible image.
Figure G3. Three IR thermographs showing resolution differences. (Images from IR
Cameras and Building Insulation Performance, Infrared Training Center, Jay
Bowen, Robert Madding, Paul Frisk.)
Figure G4. The electromagnetic spectrum. (Figure from Infrared Training Center.)
Figure G5. Thermal image and the three represented components of infrared radiation
the camera detects: emitted, refl ected, and transmitted radiation. (Figure from
Building Science Institute.)
Figure G6. In the IR thermograph below, the apparent temperature of the vent has a mini-
mum temperature of –17.4 °C (0.68 °F). This is an example of refl ection of the
cold sky on the top of the vent. (Image from John Fricot, FLIR Systems.)
Figure G7. The IR camera viewing through thin plastic, showing an example of transmis-
sion. (Image from Building Science Institute.)
Figure G8. Image of a single-story building. The cooling pattern is due to the cool sky
refl ecting due to the angle of the IR camera. The image on the right is taken
with less of an angle, eliminating the cooling pattern shown in the fi rst ther-
mograph. (Images from BCRA.)
Figure G9. IR thermogram of a two-story building. Temperature patterns vary from dif-
fering amounts of solar insolation due to the various angles of the sun and
shading from overhangs. (Image from BCRA.)
Figure G10. IR thermogram of a one-story building showing cooler patterning in the upper
area of the wall due to shading of the exterior of the building. (Image from
Building Science Institute.)
Figure G11. The heat transfer as seen from a fi replace. (Image from BCRA.)
Figure G12. Evaporative cooling of drywall that has been exposed to moisture during fl ood-
ing. (Image from BCRA.)
Figure G13. Heat transfer by convection (air movement) within the fi berglass insulation.
The lower image is an IR thermograph showing the heat transfer pattern.
(Image from ORNL.)
Figure G14. Heat transfer by conduction in areas of missing insulation. (Image from Joseph
Footen, Thermal Images, LLC.)
Figure G15. Heat transfer by convection is observed in this IR thermogram during a pres-
sure test as heated air fl ows over the chimney and ceiling surface, locating
extensive air leaks around the chimney of this building. (Images from BCRA.)