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November 06, 2008 00:11 AM  BY WARMZONE
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There has been
much debate over low voltage radiant systems versus line
voltage radiant systems as radiant heat gains popularity in
North America. The aim of this article is to dispel
some of the myths surrounding the different kinds of
systems.
Myth 1: Low voltage radiant systems are safer than
line voltage.
Low voltage is
low, so it makes sense that it’s safer, right? While
this makes perfect sense initially, we have to take a
closer look to find out the real answer. If your
definition of safe is the chances of being hurt by
voltage during installation, low voltage will give you a bit
of a shock, but won’t cause lasting damage. The
real question we should be asking is how durable is
the cable against damage and how well is the cable
insulated. Both line and low voltage snow melting systems
are embedded in 4 inches of concrete, asphalt, or
under pavers. When installed properly the embedded
systems are not exposed and harmful. Some low voltage
heating wires are NOT designed for embedment. These have
only a thin layer of plastic and a heating element
that is THHN/THWN wire. This wire is intended for
interior use NOT in concrete, asphalt, or under
pavers. Low voltage wires do not have ground fault
protection, so electrical leakage can go undetected.
In contrast, line
voltage obviously has higher voltage, which is why line
voltage cables are built to withstand wear and tear, and are
much more difficult to damage. If you do manage to
damage a line voltage cable, don’t worry! Line
voltage systems are equipped with ground fault
protection (GFEP) breakers with a 30 milliamp trip. Which
means the system will automatically shut off when it
has reached beyond allowable leakage levels. What does
this mean? Well for one you don’t need to worry
about bodily harm, but you also don’t need to worry
about potential fire hazard from a damaged cable. The
bottom line: both line voltage and low voltage systems
are safe to use.
Myth 2: Low voltage radiant systems cost less to
run than a line voltage system.
It is true that
low voltage radiant systems consume a lower amount of
power, but this doesn’t mean it is less costly to
run. Low voltage systems can actually be more
expensive to operate because these systems generally
produce 20 watts/sq ft (which is below ASHRAE standards). By
producing less heat per square foot, it takes longer to heat
the same area, thus increasing the cost and the time
it takes to melt. Because of the decreased heat
output, during heavier snow falls low voltage systems
struggle to keep up with the snowfall, and have to remain on
much longer. For this reason, ASHRAE has set forth
watt standards for snow melting.
Line voltage
systems are designed specifically for the environment in
which they will be operating. These systems are made to
produce the necessary watts (that meet ASHRAE
standards) to melt snow in the most efficient time
possible.
Some low voltage systems
on the market have some distinct advantages over line
voltage. Zmesh is low voltage, but does not rely on heat
cables to generate heat. Instead it is constructed of
a unique thin mesh that requires no embedding in
thinset and can be installed directly under carpet
pad, hardwood and even for use on your roof for snow and ice
melting. The biggest advantage of Zmesh is that you can
hammer nails into it without worry of damage!
Myth 3: Low voltage systems are easier to repair.
Both line voltage
and low voltage cables are easy to repair. Simply
remove the bad section of cable, add in a splice kit, cover
it back over with whatever surface it’s in, and
the system should operate as normal. You do not have
to replace the entire cable or rip out the entire
surface, only the area that is damaged. The location of the
break can be identified by using devices such as the
DEVItrace from Danfoss or a TDR, which uses radio
frequencies and a “wand” to locate the damaged
section of cable.
Myth 4: Low Voltage systems are more efficient.
Low voltage
systems are NOT more efficient. Since these systems have a
much lower output of heat per square foot; they take much
longer to melt snow, especially during heavy snow
storms and probably will not be able to keep up with
the demand. Further increasing their inefficiencies, low
voltage systems must have the electricity pass through a
transformer and very thick power leads (2 gauge),
which causes voltage to drop as it travels distance
before reaching the heating element. Line voltage cables
have the energy to go directly into heating, without the
loss of power. Overall, both line and low voltage
systems are more efficient than hydronic snow melting.
Myth 5: Low voltage systems offer a better warranty.
Some low voltage
warranties are very deceiving. They boast of a 25 year
warranty period, but when examined closer it is found that
the 25 year warranty only covers the heating wire. As
discussed earlier these heating wires are actually
THHN or THWN, which can be purchased relatively
cheaply at any hardware store.
Warmzone’s
line voltage cable manufacturer’s warranty (Danfoss)
covers up five times the cost of the original system
which is intended to cover the cost and time involved
in making repairs, not just the actual heating element
itself.
Myth 6: Both systems provide sufficient heat.
Low voltage
systems in most snow melting applications do not meet the
ASHRAE standards. The minimum watts per square foot ASHRAE
requires in North America is 32 watts per square foot.
Popular low voltage systems on average are designed to
produce approximately 20 watts per square foot and
with extremely tight spacing will max out at 30, still below
the standards ASHRAE has set forth.
Line voltage
systems are designed specifically for the environment in
which they will be operating. These systems are made to
produce the necessary watts (that meet ASHRAE
standards) to melt snow in the most efficient time
possible.
Myth 7: Both systems are UL Approved.
Most low voltage
snow melting systems are not UL listed. Warmzone’s
line voltage systems are UL tested and approved.
SYSTEM WEAKNESSES
- THHN/THWN wire was not designed for concrete
embedding. The outer jacket is soft and easily
cut which will shorten its life.
- Low heat output – Does not satisfy
ASHRAE requirements.
- Bulky and costly controls (transformer and
control box are 100 lbs per 200 square foot
zone).
- Warranty - only covers THHN/THWN wire. Control
box is 1 year, transformer is 5 years.
- Slow to install - the transformer and control
box are complicated and time consuming to
install.
- Noise – transformers emit noise and
location of them must be considered.
- Price – low-voltage systems are
typically double the price of a comparable line
–voltage system.
As radiant
heating systems have gained popularity, a lot of
fly-by-night manufacturers are trying to cash in on
the recent boom. This sparked ASHRAE to come out with
standards for radiant snow melting systems to prevent
abuse from manufacturers. Most low voltage radiant snow
melting systems don’t meet the ASHRAE standards
for quality and efficiency. Unfortunately, not all
consumers are aware of standards in the radiant
industry and purchase faulty products unwittingly and end up
with negativity towards radiant heating in general.
Rest assured there are plenty of efficient radiant
systems that will run smoothly for decades without
needing any maintenance. Make sure to do thorough research
before purchasing any products, which means checking
for proper safety certifications and standards, and
you won't regret it.
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December 03, 2008 00:12 AM  BY STACEY BARRUS
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When replacing a
home heating system, there are a lot of questions that
people have in regards to new home heating
systems. Here is a questions that was recently
asked.
Q: My 1,200
square foot home used to be heated by a furnace from 1949
that ran at 25,000 BTU. Recently I changed the system to a
newer, 7,000 BTU system. I thought this newer heater
would be more efficient, but I find that it takes much
longer to heat the house than the older system did. Is
there something wrong with my furnace or do I need one that
has a higher BTU?
A: It’s a good idea to replace old heating
systems with newer, more efficient models. These new
models can work just as well or better than old
systems, but they do work differently. Where old
furnaces could be turned on and heat the house within a
matter of minutes, new heating systems can take
longer. If you want your home to be warm at a certain
time, set the heat to go on about 45 minutes prior to that.
Another important factor is whether your home is
“weather-tight.” Make sure all doors and
windows are properly sealed. If not, you may be losing
heat at the same rate your heating system is producing it.
Check with a heating contractor who can tell you
whether the new unit is sized correctly for your
home’s square footage.
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December 10, 2008 00:12 AM  BY STACEY BARRUS
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Recent research by Wavin Plastics into the
publics perception of under floor heating systems
has revealed more than a third of house buyers
would include this type of heating in their top
five wish list of luxury items when buying a new
home.
While findings show that
awareness of under floor heating systems
and its benefits are high, only a tenth of the
population have actually lived in a property
which has such a heating system. However, 37% have
experienced the comfort of these heating
systems either by visiting a home or hotel which has
the system installed.
There are many benefits to
under floor radiant heating systems, such as
warmth without the dryness of central heating,
comfortable to walk on with bare feet, as well
as being very energy efficient.Many times, once
people have experienced how fantastic radiant
heating systems are they want them in their own homes.
More and more people are realizing the benefits
of radiant under floor heating.
Surprisingly, these radiant
floor heating systems are now very
affordable.There is virtually a system out there
for every budget.If you’ve always
dreamt about the possibilities of having floor
heating, but always assumed it was too
expensive, you should contact the staff at warmzone.com
about economical floor heating solutions.
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December 26, 2008 00:12 AM  BY STACEY BARRUS
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We couldn’t say it any plainer than this:
radiant
heaters are the most efficient form of heat
available in today’s market.
Significantly less operating time is required to attain
and maintain the desired warmth compared to
furnaces and other, traditional methods of
heating, which keeps operational costs to a minimum.
High efficiency boilers or
electric radiant floor systems makes radiant
heat one of your most efficient ways to heat your
home. Combined with a well- insulated home these
systems can quickly warm your home and then shut
down or wait idle for long periods of time before being
called upon by the thermostat to operate.
More than ever before, homebuilders,
househunters, and home renovators alike are
looking for energy-efficient heating options for houses.
We say they need look no further than radiant
heaters for their ideal home heating solution.
Radiant Heaters Tip: Being more
environmentally friendly doesn’t have to
involve major renovations. Many peoples’ homes
waste a lot of energy by not sealing cracks, doors and
windows. Checking to make sure a home’s
insulation is in good shape and replacing it if
it’s not is another good surefire way to stop,
prevent, and reverse energy waste.
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November 11, 2007 00:11 AM  BY WARMZONE
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Radiant heaters,
as opposed to warm air systems (such as a forced air
unit heaters), deliver the source of heat to the floor
level, not the ceiling. And since warm air rises,
heating the floors proves to be the most efficient
means of heating living areas.
Radiant heaters
or radiant energy is the oldest form of heating used to
provide comfort and is the basis for all heating systems.
Radiant energy is totally pure radiation and is
absorbed by an object without physical contact with
the heat source or by heating the surrounding air, as is the
case with convective, forced air systems.
Under floor
heaters were first used by the Romans. Initially the
preserve of the rich, under floor heating became
increasingly commonplace in public buildings and
villas, particularly in the colder regions of the
Roman Empire. The Roman system was based on hypocausts,
comprising ducts that underlay the floor (itself built
on raised brick piles) and flues that were built into
walls. Hot air or steam from fires circulated up
through this system, warming the floor and walls, with heat
passing into the rooms.
More
specifically, the floor was laid out as series of concrete
slabs acting as radiant heaters supported by columns
of layered tiles, with a furnace at the bottom of one
exterior wall. By placing the fire here, the draught
would take the radiant heat under the floor, and up through
the walls to radiant heater chimneys located in the
corners of the room.
Today we
recognize the brilliance of the Romans and Koreans as early
adopters of radiant heating, as the technology is still a
desired method for delivering comfortable and
efficient heat in our homes. Now we have radiant
heaters using electric resistance cables that are
constructed of highly rated materials and feature
manufacturer warranties of up to 25 years.
About Warmzone
Warmzone provides consumers with
energy-efficient, radiant heating solutions for homes
and businesses. Based in Salt Lake City, Utah,
Warmzone's electricians and radiant heat experts will help
you determine the best radiant heating solution,
ranging from electric heated floors to large
commercial snow and ice melt projects. Send us a plan or
drawings and we'll be happy to provide you with a
FREE estimate
and options for your
roof
heating and ice melting
project.
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December 14, 2008 00:12 AM  BY STACEY BARRUS
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If you’re
in the market for a new home heating solution, you may be
wondering what kinds of home heating choices are there? A
majority of homeowners are probably most familiar with
forced air unit heaters and might not realize that
there are other options for heating a home – other
options that are more efficient and even more comfortable.
One such option are radiant
heaters, which, as opposed to warm air systems, delivers
the source of heat to the floor level, not the ceiling.
Radiant
heaters or radiant energy is the oldest form of heating
used to provide comfort and is the basis for all
heating systems. Radiant energy is totally pure
radiation and is absorbed by an object without physical
contact with the heat source or by heating the surrounding
air, as is the case with convective, forced air
systems. Believe it or not, under-the-floor heaters
were first used by the Romans. While under floor
heating was initially reserved for the rich, it eventually
became increasingly commonplace in public buildings
and villas. This form of radiant heating was used
particularly in the colder regions of the Roman
Empire. The Roman system was based on hypocausts, comprising
ducts that underlay the floor (itself built on raised
brick piles) and flues that were built into walls. Hot
air or steam from fires circulated up through this
system, warming the floor and walls, with heat passing into
the rooms. Radiant Heaters Tip: Health
experts agree that radiant heaters can help in
eliminating dust mites that live in our homes, and since
dust mites love a warm moist environment, towel
heaters aid in maintaining a consistent room
temperature and keep it moisture free.
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December 18, 2008 00:12 AM  BY STACEY BARRUS
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Quite simply put, radiant
heaters are the most efficient form of heat
available in today’s market.
Significantly less operating time is required to attain
and maintain the desired warmth compared to
furnaces and other, traditional methods of
heating, which keeps operational costs to a minimum.
High efficiency boilers or
electric radiant floor systems makes radiant
heat one of your most efficient ways to heat your
home. Combined with a well-insulated home these
systems can quickly warm your home and then shut
down or wait idle for long periods of time before being
called upon by the thermostat to operate.
More than ever before, homebuilders,
househunters, and home renovators alike are
looking for energy-efficient heating options for houses.
We say they need look no further than radiant
heaters for their ideal home heating solution.
Radiant Heaters Tip: It might take a
little effort, but being more environmentally
friendly doesn’t have to involve major
renovations. Many people waste a lot of energy by not
sealing cracks, doors and windows. Checking to
make sure a home’s insulation is in good
shape and replacing it if it’s not is another
good surefire way to stop, prevent, and reverse
energy waste.
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December 22, 2008 00:12 AM  BY STACEY BARRUS
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The number of types of radiant
heaters available for residences or businesses is
awfully mind-boggling. There’s really a
lot of selection for homeowners to choose from.
Today we’ll discuss the electric cable heating
system kind of radiant heaters.
Electric cable heating systems
are gaining popularity in as radiant
heaters and are ideal for heating smaller areas
(10-300 square feet) like bathrooms, kitchens,
and sun rooms. These systems are comprised of a
thermostat and a heating cable. On some systems, the
cable will be shipped to you as a large spool of cable.
These systems are oftentimes less expensive, and
give you the ability to space the cable how you
want and customize a layout that will heat every square
inch of your floor. Other systems have the cable
attached to a plastic mesh or tape to create a
mat to maintain its proper spacing.
Every available cable system
is equally effective, so when determining which
radiant
heater system to purchase, you should look at the
warranty of the product, along with the ease of
installation. Some cables must be embedded in a
separate layer of concrete or mortar, whereas other
systems can simply be installed in the thinset.
Radiant Heaters Tip: When heating
smaller areas with a radiant
heater, it is nearly impossible to beat the
simplicity and price of an electric cable
heating system.
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December 23, 2008 00:12 AM  BY STACEY BARRUS
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For homeowners or
renovators, it’s worth taking a look at several kinds
of radiant heaters for residences or
businesses. Today we’ll discuss the electric
cable heating system kind of radiant heaters.
Electric cable heating systems, often called
line- or high-voltage systems, are gaining popularity
and are ideal for heating smaller areas like
bathrooms, kitchens, and sun rooms. These systems are
comprised of a thermostat and a heating cable. On some
radiant
heater systems, the cable will be shipped to
you as a large spool of cable. These systems are
oftentimes less expensive, and give you the ability to
space the cable how you want and customize a layout that
will heat every square inch of your floor. Other
systems have the cable attached to a plastic mesh or
tape to create a mat to maintain its proper spacing.
Every available radiant heater cable system is
equally effective, so when determining which system to
purchase, you should look at the warranty of the
product, along with the ease of installation. Some cables
must be embedded in a separate layer of concrete or
mortar, whereas other systems can simply be installed
in the thinset.
Most cable systems can only be installed under
tile; on others, if the cable is embedded in mortar or
concrete, any flooring can be installed on top of the concrete.
Radiant Heaters
Tip: When heating smaller areas with a radiant
heater, it is nearly impossible to beat the simplicity
and price of an electric cable heating system.
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December 22, 2008 00:12 AM  BY STACEY BARRUS
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Are your eyes so tired from all the research
you’ve been doing because you’re
looking to warm your floors with radiant
heaters? We know, it sometimes can be hard to narrow
down what kind of radiant
heaters to install. There are dozens of products
available to purchase, and there are even more
companies telling you that their product is the
best.
For many homeowners, electric
cable heating systems, often called line- or
high-voltage systems, are gaining popularity and are
ideal for heating smaller areas like bathrooms,
kitchens, and sun rooms. These systems are
comprised of a thermostat and a heating cable. These radiant
heater systems are oftentimes less expensive, and
give the ability to customize a layout that will
heat every square inch of your floor.
Every available radiant heater
cable system is equally effective, so when
determining which system to purchase, you should look at
the warranty of the product, along with the ease
of installation. Some cables must be embedded in
a separate layer of concrete or mortar, whereas
other systems can simply be installed in the thinset.
Most radiant
heater cable systems can only be installed under
tile. However, on others, if the cable is
embedded in mortar or concrete, any flooring can
be installed on top of the concrete.
Radiant Heaters Tip:
When heating smaller areas, it is nearly
impossible to beat the simplicity and price of an
electric cable radiant
heating system.
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