Thermal Resistance Value: This is a measurement of the ability of a material to resist heat transfer.

RSI: Metric Measurement

R-Value: Imperial Measurement

CONVERSIONS:

RSI to R-value multiply by 5.678

R-value to RSI divide by 5.678

Thermal Resistance as defined by CAN/ULC-S773-15: The quantity determined by the temperature difference, at a steady-state, between two surfaces of a material that induces a unit heat flow rate through a unit area.

Remember… just like when you learn to dance, the instructor counts off the timing as "5, 6, 7, 8!" Use this to convert from RSI to R-value by multiplying by 5.678.