There
are no texts that you can purchase that cover our subject matter
completely. Many teaching establishments have attempted to produce
manuals on residential HVAC systems,but mostly these manuals are
based on material and models produced by the American Society of
Home Inspectors. Although their content will surely enable the user
to examine Canadian residential HVAC systems, our Codes and Standards
unique to Canada could leave the learner with a deficit that may
cause him or her to miss a vital unsafe condition.
Because of
the time I have spent in the HVAC industry in Ontario, working with
fuel codes,building codes, inspections, installations service work
and homeowner complaint resolution, I am able to apply this vast
amount of learning to a manual that covers the entire basics of
residential Heating Ventilation and Air Conditioning from a purely
Canadian perspective, covering all of Canada's excellent safety
standards, covering installations and conditions that are totally
practical to the typical student.
My manual,
is complete with all the information you would need to assist you
as you start on this road to learning about residential HVAC systems,
short form names are explained, pictures and details that are not
normally available to your average educator are reproduced whenever
I feel that the operation or installation of a system or method
of operation would be better explained. After all a picture is usually
worth 1000 words! It will leave the learner in no doubt about the
subject matter in the classroom and instantly recognizable on site.
Below:
Page detail
from my manual showing exactly what type of appliances can produce
a dangerous spillage of flue gasses into the building envelope,
and which furnaces can not.
Atmospheric gas fired furnace with draft hood opening,. Vent
pipe is above, the round metal (galvanized) piping.
Compare this picture of an actual spillage susceptible appliance
with the schematic detail above.( Reproduced with permission
from NRCan).
If when operating a problem occurs with the operation of
the chimney or venting system this furnace can fill the building
envelope with the products of combustion. Providing that the
combustion was being "complete" then no lethal situation
would start to occur entail the building envelope was deprived
of oxygen.
The details of the other two appliances clearly show that
with no opening to allow products to leave the furnace after
combustion of the gasses, the whole combustion process is
not only safer but much more efficient. No conditioned air
from the building envelope is entrained into the venting process
except for the designed amount induced by the vent motors.
Atmospheric venting appliances will vent conditioned air from
the building envelope whenever there is a difference between
the indoor and outdoor air pressures. Negative pressure in
the home will or can induce the products of combustion to
be entrained into the building envelope and not vented out
of the chimney. This process is clearly identified with the
energy audit.
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My manual is as complete as this and as full of pictures to present,
in as much detail as possible, so as to leave the student in no
doubt of the subject matter.
A whole module built just for ventilation of our homes will leave
the learner in no doubt about the importance of this topic. For
the in-class participant the on-site energy audit puts the whole
subject into perspective. If your course did not include this, you
will be missing most of the implications available in this unique
practical application.
This proven method of learning, see, feel, hear and do is what
I practice in my in-class presentations. A guaranteed pedagogical
process where the student remembers at least 60% of the subject
matter
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