1. Gas Furnaces: Types and
Effectiveness
 Your gas furnace at home is one of the most
useful appliances. It can help owners to think
and work, properly, effectively, and smoothly.
Come find out what are the types and
efficiencies of each type in
Cliff Bergin Associates
 First is the Conventional Furnace - These
types exhaust combustion gas quick and very
hot so this gas exits the chimney vent before it
cools and condenses. Thus, the heat
exchanger of the furnace does not gather
enough heat from combustion.

2.  Meanwhile, Condensing Furnaces collects heat
after combustion gases have already
condensed and cooled. It uses dual heat
exchangers.
 First is for primary exchange of heat and
another one is to handle condensed exhaust
vapor and also carbon dioxide.
 These products make carbonic acid. These
gases are of low heat and when condensed
water leaks out of its heat exchanger, vent
gases exit from a PVC pipe rather than a
chimney.

3.  There are also different types of gas furnaces
according to its burner's operation. It is referred
to as the stage: the complexity of the blower
and burner systems.
 Examples are the Single Stage, Two Stage or
Dual Stage, and Modulating.
 A single stage is the cheapest and its blower
and burner has only one stage.
 The two stage contains electronic controls
which allows the flame and the burner on a low
and high setting

4.  Modulating Furnace also contains electric
controls. But these controls are able to make
finer adjustments to its burner and flame. It also
controls the blower speed, modulating them so
as to keep room temperature closer to the
setting of its thermostat.
 The metric system that is made to measure the
efficiency of Gas Furnaces is called AFUE
rating. It counts the ratio of converted heat
inside the space to the quantity of gas that the
furnace takes in.

5.  If the AFUE is higher, the furnace is more
effective. For example, a low efficiency furnace
has a fifty five to seventy two percent AFUE.
These furnaces are already obsolete.
 Standard or Mid efficiency furnaces are at
eighty to eighty three percent and High
efficiency furnaces have at least ninety to 98
percent.
 Most households today are obligated to own
furnaces with an AFUE of seventy eight
percent.

6.  However, these furnaces are mostly found on
manufactured homes. Individually, furnaces
must be at least ninety percent AFUE in order
to pass the standards of the Department of
Energy.