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STROM LIMITED
INSTALLATION GUIDE
WHAT IS TPI?
Reducing energy costs and carbon emissions is within reach when tting
thermostats with TPI.
TPI or Chronoproportional Controls is a load compensator as it works by
ensuring the boiler ‘on’ time is reduced to a minimum and balances the
boiler heat output with the heat loss. This reduces the net temperature of
the return water to the boiler.
Where a thermostat without TPI is used the benets of a high-eciency
condensing boiler are rarely realised and will often not be running in
condensing mode.
Where TPI is used there is the benet of more accurate temperature
control plus possible reductions of upto 10% in both fuel cost and carbon
emissions.