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4. Inspection and Testing Continued
Installation & Owner’s Guide 12
120V Radiant Heat Film Resistance Values
Tolerances for resistance measurements are -5% and +10%. To determine nominal resistance for 120V, divide
14,400 by the total wattage. This will equal Nominal Resistance for the 120V material. Next, multiply nominalre-
sistance by 1.1 to equal the high limit. Then, multiply the nominal resistance by .95 to equal the low limit.
240V Radiant Heat Film Resistance Values
Tolerances for resistance measurements are -5% and +10%. To determine nominal resistance for 240V, divide
57,600 by the total wattage. This will equal Nominal Resistance for the 240V material. Next, multiply nominal
resistance by 1.1 to equal the high limit.Then, multiply the nominal resistance by .95 to equal the low limit.
NOTES:
Record the resistance measurements of each mat after installation. These measurements should be
compared to the readings recorded on the product label for each mat to confirm a successful installation.
These measurements are required for warranty registration.
If a mat fails the resistance check, it must be retested after any corrective actions.
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