the 21st century controller for your heating system.
It applies to any electric or dual heat system, new or
retrofit. This article
presents only two applications – electric boiler and heat pump
– do not overlook other applications and the many WarmFlo benefits.
WarmFlo/Car Accelerator Pedal
An air source heat pump
is a very efficient heating system (up to 300%), but because
it uses outside air it has limits on room air delivery temperature.
Example, at 45° outside the room register warm air may
be 100° but typically at 30° the warm air temperature may be
below 90°. Air that
is moving past your skin, at below body temperature, is uncomfortable.
A Dual Fuel arrangement is where a heat pump is combined
with a gas furnace and at the point where the warm air delivery
is uncomfortable the heat pump is turned off and the gas furnace
is used for all heating below this outside temperature preset
point. This is not
a very efficient combination because the high efficiency heat
pump (200% and above) is no longer used and is of no value if
it is turned off. The
Electro-Mate/WarmFlo addition to this combination
allows the heat pump to produce its high efficient energy down
to 0° or -10° outside.
The WarmFlo controller has temperature sensors and control
logic to always deliver comfortable warm air (selected by the
user) and adds only the minimum amount of 100% efficient electric
heat to “make up” the energy difference.
As the automobile foot pedal accelerator is used in the
electric boiler analogy, so the WarmFlo controller is the “accelerator”
for the electric resistance (Electro-Mate)
portion within your heat pump combination.
WarmFlo smoothes out and carefully controls the 100%
electric resistance portion to make sure the room register warm
air is comfortable but not necessarily overheated (100 miles
per hour) so the more efficient heat pump can run longer and
provide its best economic performance.
The majority of the Electric Boiler,
hydronics heating, installations have several zones or thermostats
in various rooms. When
one thermostat calls for heat it represents only a partial load
to the boiler. Perhaps
we could use the analogy of an automobile accelerator pedal
to relate to WarmFlo. WarmFlo
controlling your boiler would act as an automatic accelerator
all other low cost boilers have an on/off device, like your
automobile ignition switch, referred to as an aquastat.
When you have a call for heat and the aquastat is on
the boiler allows it to run at full energy capacity, totally
independent of the load on the boiler.
Just like the boiler is sized for full energy capacity
to heat your house on the coldest day with all thermostats calling
simultaneously, your automobile engine has the horsepower or
energy capacity to carry 5 adult people with probably 500 pounds
in the trunk at 100 miles per hour when the accelerator is all
the way down to the floor.
You would not be very satisfied with your automobile
if it did not have an accelerator pedal (it would be 100% on).
In this analogy you would start out at the stop sign
by simply turning on the ignition switch (thermostat call for
heat). It would
use all its energy up to 30 miles per hour, you would then turn
off the ignition switch (thermostat satisfied), coasting to
20 miles per hour, then turn the ignition switch back on and
continue the process. With
a lightly loaded automobile at 30 miles per hour the accelerator
is approximately 15% of the way pressed to the floor.
It certainly is much more reliable, safe, and comfortable
operating at the 15% point.
Likewise with WarmFlo, if it is 50° outside and only
one thermostat is calling for heat (bedroom representing a small
load) the boiler may only run at 15% capacity, controlled by
WarmFlo represents the controlling mechanism within your heating
system to “smooth out” the energy capacity within the furnace
or boiler to make sure it adjusts to the load capacity requirement
at each thermostat call for heat.