FURNACE EXHAUST HEAT RECOVERY SYSTEM

SYSTEME DE RECUPERATION DE CHALEUR D'ECHAPPEMENT D'APPAREIL DE CHAUFFAGE

Claims

CLAIMS
1. FEHRS refers to Furnace Exhaust Heat Recovery System.
2. Furnace Exhaust Heat Recovery System is used as secondary heat exchanger to
maximize heat
absorption from exhaust and installed as separate unit or built in with the
furnace, boiler, wood stove or
absorb heat from steam.
3. Furnace Exhaust Heat Recovery System as a very efficient heat recovery
ventilator because it does not
loose heat in the process of bringing fresh air in the structure being heated
because it absorbs heat from
exhaust that is commonly vented out of the structure. It does not use
electricity when used with furnace
because it uses the built in exhaust blower to vent exhaust and built in
suction blower to suction and
circulate cold fresh air from outside the structure into the structure being
heated.
4. Furnace Exhaust Heat Recovery System when used with boiler, wood stove or
absorb heat from steam
will make the unit very efficient by absorbing heat that is usually vented out
of the structure being
heated with the installation of a fan blowing cool air through the chamber
walls.
5. Furnace Exhaust Heat Recovery System absorb and transfer heat from furnace
exhaust that goes into
the chambers through heat and cold exchange by preheating the cool air in
suction line or cool air in
suction line and cold fresh air outside the structure entering the suction
line going through the chamber
walls.
6. The Chambers thickness, width, depth, height, number of U channels and
number of chambers are
factors how much heat and cold exchange will occur.
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7. The temperature of the exhaust air from the furnace and the temperature in
cool suction line or cool
suction line and cold fresh air outside the structure entering the suction
line, or blown cool air by fan are
factors how much heat and cold exchange will occur.
8. The position of the U channels within the chamber walls forming sharp
corners so air is constantly
churning as it goes through left right and right left going up the chamber for
greater heat and cold
transfer at the same time as canal for condensed moisture to flow through
gravity.
9. The U channels length is shorter than the chamber wall's horizontal length
equal to the opening of the
input and output of the chamber to allow ease of exhaust air to flow through
the chamber.
10. The U Channel will grip the two walls together by using aluminum rivets
with or without the tube
spacer and provides rigidity and support to the chamber walls.
11. The number of U channel is determined by the opening of the inlet and
outlet and height of the
chamber.
12. The V angled bottom of the furnace exhaust intake distributor chamber is a
canal that will allow
drainage of water out of the Furnace Exhaust Heat Recovery System chambers
through a drain tube.
13. The exhaust line of the furnace, boiler, wood stove, or steam enters the
intake distributor then
distributed to the individual inlet of the chambers heat exchanger of the
Furnace Exhaust Heat Recovery
System at the lowest part and goes through the sharp serpentine channel up the
chamber and out the
chambers outlet at the same time cool air in suction line or cool air in
suction line and cold fresh air from
outside the structure entering the suction line of the furnace, or blown cool
air by fan goes through the
outside wall of the individual chambers where heat and cold transfer occurs.
14. The exhausted cooler air from the outlet of the individual chambers heat
exchanger of the Furnace
Exhaust Heat Recovery System is accumulated in the exhaust accumulator at the
highest part of the
chambers, and then goes out of the exhaust accumulator as exhaust air going
out of the structure being
heated.
15. The front bottom corner of the chamber wall is lower than the back bottom
corner to facilitate the
flow of water through gravity.
16. The exhaust air going out the output accumulator is cooler than the
exhaust air going in the intake
distributor.
17. The intake and output of the Furnace Exhaust Heat Recovery System can be
in one side or opposite
sides.
18. The Furnace Exhaust Heat Recovery System is for residential, commercial,
and industrial use.
19. The Hole for intake distributor and output accumulator can be placed in
any sides of the intake
distributor case or output accumulator case that best suit the installation.
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Description

CA 02830536 2013-10-18
Furnace Exhaust Heat Recovery System
The invention Furnace Exhaust Heat Recovery System or FEHRS is a Heat
Exchanger Multiplier,
this is a secondary heat exchanger with 2 times or more heat and cold exchange
surface area to increase
the efficiency of furnace, wood stove, or boiler by absorbing heat from
exhaust or absorb heat from
steam that is usually vented out of the structure being heated, and a very
efficient heat recovery
ventilator that does not loose heat and does not use electricity in bringing
in fresh air from outside the
structure being heated.
The common gas furnace, boiler and wood stove are not very efficient because
there's a residual
heat being vented out of the exhaust and out the structure being heated. This
is common to most
furnace, boiler and wood stove because it can't absorb more heat that will
result to moisture from gas
and air to condense into the furnace, boiler or wood stove because it will
accumulate water and corrode
the furnace, boiler and wood stove. Some boilers waste heat by venting steam
out of the structure
being heated. Most heat recovery ventilator looses heat in the process of
warming fresh air being
suctioned in the structure and use electricity to circulate hot and cold air.
The Furnace Exhaust Heat Recovery System or FEHRS absorbs most of the heat
that is commonly
vented out of the structure being heated by preheating cool air in suction
line or preheating cool air in
suction line and cold fresh air outside the structure entering the suction
line going through the chamber
walls when used with a furnace, or preheating blown cool air by fan through
the chamber walls when
used with boiler and wood stove or absorbing heat from steam. Hot exhaust from
the furnace, boiler,
wood stove, or steam enters the lowest part of the chambers serpentine passage
and loose heat as it
goes through within the chambers then exiting the highest end of the chambers
at a much lower
temperature than when it entered the chambers while moisture condensing from
gas, air and steam
drain down and out the chambers. Cool air in suction line or cool air in
suction line and cold fresh air
outside the structure entering the suction line or blown cool air by fan goes
through the chambers
outside walls at the highest end of the Furnace Exhaust Heat Recovery System
and exiting at the lowest
end warmer than when it entered the Furnace Exhaust Heat Recovery System, then
enters the suction
of the furnace for furnace installation. The Furnace Exhaust Heat Recovery
System as heat recovery
ventilator does not loose heat because it recovers heat that is usually vented
out the structure being
heated and does not use electricity because it use the furnace exhaust motor
to circulate hot air and
suction blower motor to circulate fresh air suctioned outside the structure.
Illustration Figure 1
The drawing in figure 1 illustrates the Furnace Exhaust Heat Recovery System
or FEHRS 1. Chamber wall
with outside 1/2 inch fold flat on wall on all corners to lock with U channel
with lock to hold two chamber
walls, and to lock with U channel with outside lock and tang to interconnect 2
chambers side by side, the
front bottom corner of the wall is lower than the back bottom corner to
facilitate drainage of water. 2.
The U channel fastened between two chamber walls by rivets are alternately
positioned starting at the
front just above the opening of the chamber input then at the back, front then
back and so forth, and
the last one just below the chamber output to form sharp serpentine corners in
the chambers within the
walls to direct airflow. The drain end is lower than the other end at the edge
of the vertical wall to
facilitate drainage of condensed moisture through gravity and they are spaced
where the narrow
passage between 2 walls and between 2 U channel canals is equal or more than
the opening of the input
and output of the chamber. 3. The tube spacer is aligned with the U channel
holes and these holes
align with the hole of two chamber walls on both side of the U channel where a
single long rivet will go
through the holes and lock the U channel in place horizontally between two
chamber walls to hold the
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CA 02830536 2013-10-18
walls together for structural rigidity. 4. U channel with lock and no tongue
for back vertical installation
to hold two chamber walls for structural rigidity and riveted to the back
case. 5. U channel with lock and
tongue for front vertical installation to hold two chamber walls for
structural rigidity and riveted to the
front case and tongue to lock with intake distributor and output accumulator.
6. U channel with lock and
tongue for horizontal installation for structural rigidity and tongue to
overlap back horizontal U channel
and tongue to lock with intake distributor or output accumulator. 7. U Channel
with outside lock and
tongue for vertical installation to hold two separate chamber walls to seal
cool air flow passage from
intake or output of the chambers and the tongue is use to hold the intake
distributor or the output
accumulator on one end and the other tongue go over the front case to keep it
in place and lock with
the other end of intake distributor or output accumulator. 8. Intake
distributor case where exhaust from
furnace, boiler, wood stove or steam enters a hole then the volume of exhaust
air or steam is
distributed to the individual chambers intake, and moisture condensing within
the individual chambers
flows into the intake distributor V canal and drain through a tube. 9. Output
accumulator case
accumulates the exhausted air from the chambers output then vent it out
through a hole then out of the
structure being heated. 10. The case protects the chambers and the front and
back hold the individual
chambers parallel to each chamber fastened by rivets with spaces between
chambers for cool air flow
passage. 11. Front case cover to protect intake distributor case and output
accumulator case, with two
holes one for exhaust pipe intake and one for exhaust pipe output. 11. Tongue
holder bracket holds the
tongue of horizontal U channel with lock and tongue, and vertical U channel
with outside lock and
tongue and becomes the front and side case bracket. 12. Rivet holds two or
more piece of sheet metal
or sheet of metal with tube spacer together. 13. Heat resistant silicone as
sealant where needed.