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Proceedings Paper

Minimum Resolvable Temperature Difference (MRTD) Testing: Equipment Specification For Building Performance Diagnostics
Author(s): G. B. McIntosh; A. F. Filippone
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Paper Abstract

Thermographic scanning has been a viable tool for investigating building envelope deficiencies for over ten years. One of the basic assumptions has been that a minimum temperature difference must exist between interior and exterior air before an inspection can be considered. It has also been assumed that the greater the air-to-air temperature difference (i.e., the greater the heat flow), the more accurate the inspection. However, for building exterior scanning, as ambient exterior temperature decreases, instrument sensitivity decreases at a rate faster than heat flow increases. In the past, manufacturers' specifications have been neither adequate nor standardized in respect to instrument sensitivity fall-off and instrument comparisons. Minimum resolvable temperature difference (MRTD) testing underway at Public Works Canada is helping to solve this problem.

Paper Details

Date Published: 12 March 1982
PDF: 12 pages
Proc. SPIE 0313, Thermal Infrared Sensing Applied to Energy Conservation in Building Envelopes, (12 March 1982); doi: 10.1117/12.932888
Show Author Affiliations
G. B. McIntosh, Public Works Canada (Canada)
A. F. Filippone, Viewscan Ltd. (Canada)


Published in SPIE Proceedings Vol. 0313:
Thermal Infrared Sensing Applied to Energy Conservation in Building Envelopes
Richard A. Grot; James T. Wood, Editor(s)

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