Choosing a Gas Log Set
Back to Gas LogsGas
logs come in two basic varieties,
vented log sets and
vent-free log sets.
A vented gas log must be used in a regular fireplace, designed
to burn a wood fire. Vent-free gas logs can be used
in a regular fireplace or can be used in a prefabricated
vent-free firebox that has no chimney.
Some vented gas logs will give up to 25,000 BTU's of heat
but most don't give hardly any heat. If you are primarily
interested in a large flame and don't care much about receiving
heat from the log set then a good choice is a vented gas
log.
On the other hand if you are expecting to get heat from
your new log set then you will want to consider either a
vent-free model or a vented gas log that is rated to give
heat (most aren't) or you can go with a vented gas log set
and a Gas Log Heater. The
Gas Log Heater will provide up to 25,000 BTU's of heat
into the room and can be used with or without glass doors.
If you have a see-through fireplace (a fireplace you can
see through) then you'll need to look at sets that are specifically
designed for a see-through fireplace. These sets will
be finished on both sides of the logs where regular gas
log sets are only finished on the front side.
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Price
Shoppers Beware
When
shopping for a gas log set there are several things
to consider. A cheap price usually means something
is missing or the quality is low. The higher
priced log sets have more detail to their logs and
better burner systems, producing a bigger and nicer
flame pattern.
Remember,
Good things are seldom "cheap" and cheap things
are seldom "good".
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- How
realistic are the logs? If you
take a good look at the picture (which will
show full-size when clicked on) you will see
that the logs are very detailed including the
charred look and grain of the wood. Cheap
log sets look fake. Count how many logs
are in the set since many sets from other companies
consist of only four logs.
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How Big is the Flame? While flame
size can vary depending on each homes gas pressure,
typically you will see a flame similar to the
picture shown. Many gas log sets have
a small flame due to the poor burner design.
To cut costs many stores sell the least expensive
burner that typically produces a small or fake
looking flame.
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Will I Need A Safety Pilot? With
a vent-free set the safety pilot is included,
most vented sets have an optional valve or safety
pilot, or wall switch/remote control option.
Pick the option that suits your needs.
For vented logs we suggest you purchase the
safety-pilot or remote option (remote option
includes safety pilot). With a standard
gas valve you will need to light the fire each
time you use the log set versus the safety-pilot
where all you need to do is rotate the knob
and the fire will light. If using LP (propane)
then you must use a safety pilot valve.
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Vented vs. Vent-Free
Vented Gas Logs
A vented gas log set simply means that you will need to vent the gas
fumes up the chimney. While vented log sets
are very popular due to their large flame pattern
and realistic look, they are the least efficient
since most all the heat is going up the chimney.
Flame size is typically larger since vented sets
usually burn more Btu's of gas. A vented gas
log set must be installed in a wood-burning fireplace
and ran with the damper wide open. Vented
log sets have the option of connecting to a
manual on/off gas
valve which is lit with a match, or can be connected
to a manual safety
pilot or a millivolt
pilot valve.
Almost all gas log sets are sold with no valve and
are purchased and installed separately. See
the section below for additional information on
gas valves.
Advantages:
- Realistic looking
- Lower purchase cost
- Large flame |
Disadvantages:
- High BTU input
- Lower heat output |
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BTU Input Rating
(average
vented log set)
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Size |
Natural Gas |
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18" |
70,000 |
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24" |
80,000 |
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30" |
90,000 |
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Propane Gas |
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18" |
46,000 |
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24" |
46,000 |
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30" |
60,000 |
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Vent-Free Gas Logs
Vent-Free gas logs lower heating costs
two ways - they require about half the fuel as compared
to conventional vented gas log sets, and they operate
with the fireplace damper closed. This means
that you're sending the heat into the room, not
up the chimney - a definite plus with fuel costs
so high. Typically the flame size is smaller
and consequently not as realistic as compared to
vented log sets. However vent-free log sets
burn up to 99.9% efficient and put that heat into
your home. A vent-free gas log set will easily
heat an average sized room or more. Many vent-free
sets can be connected to a wall thermostat or remote
control with a thermostat and used as supplemental
heat.
Vent-free gas logs are available in two types of
logs, ceramic fiber logs and concrete refractory
logs. The ceramic fiber logs will glow after
about 15 minutes of use giving a more realistic
burn where the concrete refractory logs will not
glow at all but are more durable and intricate in
their detail.
All vent-free gas log sets come complete with a
gas valve but you may have a choice on either a
manual safety pilot gas valve or a millivolt gas
valve. See Picking a Gas Valve for more information.
Vent-Free gas log sets are for use in wood-burning
fireplaces or approved vent-free firebox enclosures.
Glass doors must be open when burning. With
adequate combustion and ventilation air the damper
may be closed for vent-free use. The damper
may be slightly opened for reduced venting.
Check local codes and ordinances for permitted uses.
Vent-free appliances are illegal in Minnesota and
Canada, for instance.
Advantages:
- High heat output
- Back-up heat source
- Burn less fuel |
Disadvantages:
- Smaller flame
- Higher purchase cost
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BTU Input Rating
(average
vent-free set)
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Size |
Natural Gas |
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18" - 21" |
26,000 |
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24" |
38,000 |
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Propane Gas |
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18" |
32,000 |
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24" - 30" |
38,000 |
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Measuring Your
Fireplace
Your
log set should be properly sized to your fireplace
using the following guidelines:
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Measure your fireplace taking the front
width (A), the rear width (B) and the depth
(C).
The log set size you can use in your fireplace
should meet the minimum dimensions.
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"A"
- Minimum 2" to 6" on each side of the nominal set
size. In other words, if you are planning
to use a 24" log set, the front opening dimension
of your fireplace (A) should be at least 28".
B"
- Not less than nominal set size. In other
words, if you are planning to use a 24" log set,
the rear dimension of your fireplace (B) should
be at least 24" wide.
"C"
- Minimum 12" to 14" (16" to 18" for see-through
fireplaces).
Be careful when measuring a Pre-Fab fireplace, typically
you will need a 36" fireplace (A dimension) for
a 24" log set.
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Picking a gas valve
Gas valves come in three varieties,
manual on/off, manual safety pilot, millivolt safety
pilot.
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Heater
Grates
Heater
Grates are a great way to get heat from a vented
gas log set or from a wood fire. The hollow
grate will get hot from the fire and the thermostatically
controlled blower will automatically come on blowing
heat into your room and shut off after the fire
dies down. The blower speed is adjustable
allowing you to control the heat output into the
room. Two designs are available, one for vented
gas logs, the other for wood burning. Can
be used with or without glass doors.
EmberAir Grate Heater
The EmberAir Grate Heater can be used
with either a vented gas log set or
in a wood burning fireplace. The
hollow titanium tube is typically routed
up and over the rear of the fireplace
grate so the heat from the fire warms
the tubing. Thermostatically controlled
with a two speed blower.
Click here for more info or to order. |
Model
5CF-EGRATE |
Width
26" |
Depth
17" |
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Gas Log Heater
The Gas Log Heater allows you to slide
the burner pan from your existing gas
log set under the rear hollow tube of
the heater grate. When the gas
fire heats up the hollow grate assembly
the fan automatically comes on forcing
up to 25,000 BTU's of heat per hour
into your home. Can be used most
vented gas log sets and is designed
for use in a masonry fireplace.
Rheostat and Thermostatically controlled.
2 Year Warranty.
Click here for more info or to order. |
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Model |
Width |
Depth |
 |
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5TH-GL-2017 |
20" |
17" |
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5TH-GL-2420 |
24" |
20" |
Cozy Grate Heater
The perfect companion for any masonry
fireplace. Tired of loosing all
the heat up the chimney? Get up
to 40,000 BTU's of heat from your wood
fire with the Cozy Grate Heater.
When the wood fire heats up the hollow
grate assembly the fan automatically
comes on forcing up to 40,000 BTU's
of heat per hour into your home.
Rheostat and Thermostatically controlled.
3 Year Warranty.
Click here for more info or to order. |
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Model |
Width |
Depth |
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5TH-TR-17 |
20" |
17" |
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5TH-TR-20 |
22" |
20" |
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5TH-TR-22 |
24" |
22" |
Gas Log
Testing Laboratories
Most municipalities
do not require any special approval on a gas log
set, however, some do. The state of Massachusetts
and the city of Los Angeles are particular about
what they will approve. You should always
check with your local city or township to see if
there are any requirements that need to be met before
purchasing you new gas log set. You may find
that your city may require a RADCO, or AGA, or ANSI,
or CSA approval before they will pass the inspection.
Each gas log set we carry will list the approval
if it has one, some don't. That doesn't mean
they aren't safe, it only means the company hasn't
tested this particular log set with an outside testing
firm. You will find that a gas log set that
carries a label from RADCO or AGA, etc. will cost
more than an identical set that isn't approved.
If you don't need the approval for you town then
it isn't necessary to pay the extra money if you
have an option.
RADCO
The RADCO approval tests gas logs for safety.
The log set does not necessarily need a safety
pilot assembly.
AGA or ANSI
"ANSI" stands for American National Standards
Institute. It is a standards organization that
approves the development of standards for gas
hearth products, as well as many other products
in the US. The AGA or ANSI standard approves
the gas log set only if it has a factory installed
safety pilot assembly.
CGA
CGA, Canadian Gas Association is a standards
organization for Canada which approves and holds
the gas safety standards for Canada.
Testing standards are changing rapidly in the
Hearth Industry.
Note: All gas log sets should be installed
by qualified service personnel, typically available
in the Yellow Pages. Read Owner's Manual supplied
with set before installing and using log set.
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