FLIR C3 User Manual

Application examples12
12.5 Draft
12.5.1 General
Draft can be found under baseboards, around door and window casings, and above ceil-
ing trim. This type of draft is often possible to see with an infrared camera, as a cooler air-
stream cools down the surrounding surface.
When you are investigating draft in a house, there should be sub-atmospheric pressure in
the house. Close all doors, windows, and ventilation ducts, and allow the kitchen fan to run
for a while before you take the infrared images.
An infrared image of draft often shows a typical stream pattern. You can see this stream
pattern clearly in the picture below.
Also keep in mind that drafts can be concealed by heat from floor heating circuits.
12.5.2 Figure
The image below shows a ceiling hatch where faulty installation has resulted in a strong
draft.
#T559918; r. AN/42281/42281; en-US
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FLIR C3 Specifications

General

Temperature Range	-10°C to 150°C (14°F to 302°F)
Field of View	41° x 31°
Thermal Sensitivity	<0.10°C
Accuracy	±2 °C or ±2% of reading
Resolution	80 x 60 pixels
Image Storage	Internal memory
Connectivity	Wi-Fi
Display	3-inch touchscreen
Image Modes	Thermal, MSX, Picture-in-Picture
Digital Camera	640 x 480 pixels
File Format	JPEG
Battery Life	4 hours
Dimensions	125 x 80 x 24 mm (4.9 x 3.1 x 0.94 in)
Operating Temperature	-10°C to +50°C