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.  

Radiant Snow Melting and Floor Heating Systems Rock Our World

It’s not something you might think of every day but radiant snow melting systems are certainly something you’ll wish you had at certain times of the year. Automated snow melting systems have proven critical in many parts of the country – for both commercial and residential applications. How much easier can it get than to pull into a snowless driveway after a full day of snow fall? Or better yet, how about waking up to a snow covered landscape and a clear driveway?

From heated driveways and roof ice melting systems to cozy heated floors, radiant heating has provided new levels of convenience, comfort and safety in the last few years. And not only do you have a choice nowadays to install these conveniences when building a home or commercial project, but existing driveways and floors can be retrofitted with electric radiant heating systems. The technology and products have advanced to the point where radiant heat offers reliable, fully automated, maintenance-free performance. You owe it to yourself to explore the many snow melting and floor heating options.

Radiant Heaters Tip: If you are looking for a great way to save energy and maximize comfort in your home at the same time, then radiant heaters may be the perfect solution for you.

Radiant Heaters Tip: It is reported that 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 way to stop energy waste.

Not traditionally used in heating homes, flat panel radiant heaters are used to heat objects via radiant heat transfer. These radiant heaters have traditionally been used in a variety of industries and applications, such as space heating, drying, curing, and water evaporation. More recently, these heating systems are also gaining popularity in home heating applications as well.

Radiant heaters use different types of emitter surfaces. Choices include: quartz, high-temperature glass, stainless steel, and ceramic tiles. These are all materials that are easily and efficiently used in home applications such as flooring, countertops, and towel racks. Because these items are easily turned into emitter surfaces for radiant heat, they can easily and beautifully be incorporated into home heating applications such as heated floors, walls, and towel racks.

To find out about radiant heaters for your home, check with the folks at warmzone.com. They have a complete product catalog of radiant heating solutions that can accommodate almost any application or budget.

Radiant Heaters Tip: radiant heaters a great way to efficiently heat a home, while maximizing your home’s beauty, but they are very cost effective and easy to install. 

Upon hearing the words, “What can Brown do for You? ®” an immediate vision comes to mind of a large, brown delivery truck with the name UPS emblazoned on each side. United Parcel Service has done an incredible job to bring their name to the forefront in the package-delivery market.  The same might be said regarding “The Golden Arches ®,” McDonald’s famous advertising ploy.  Most highly-successful businesses are easily recognized by a catchy slogan or an eye-catching symbol.

We at Warmzone want to be known in the radiant heat arena as the company that will do everything possible to “just make sense” of what might be a confusing array of possibilities for consumers who are seeking information on alternative heating sources.

Why are such vast numbers seeking an alternative radiant heating source ?

Questar Gas Company, included the following message with January’s fuel bill mailing:  “As you have seen, natural gas bills this winter are significantly higher than last year.  Even with all the news about higher natural gas prices, reality doesn’t set in until your bill is opened.”  Unless customers have been oblivious to drastic increases in fuel costs over the past two months, this was somewhat of an understatement.  More than just reality has set in upon consumers!  Caught somewhere in the middle of paying a huge fuel bill and taking a sick child to see a doctor, people are taking a stand against such increases. 

President Bush has encouraged our nation to look for alternative sources as we have become “addicted to oil.” In his state of the union address on January 31, 2006 he announced the Advanced Energy Initiative, a 22% increase in clean-energy research at the Department of Energy, “to push for breakthroughs in two vital areas. To change how we power our homes and offices, we will invest more in zero-emission coal-fired plants, revolutionary solar and wind technologies, and clean, safe nuclear energy.”  Quoting once more from the Questar message: “As you can see, prices on the open market are volatile and have increased to record highs this year both nationally and locally.” 

Volatile, skyrocketing, record high fuel costs provide reasons aplenty for so many people to turn to Warmzone.com for guidance in finding the best-possible radiant heat system for their needs.  Consumers are finding themselves backed into a corner and are looking for an efficient, comfortable alternative.  That just makes sense!

With our commitment to researching the best options for radiant heat and assessing each job individually, our research and design team is prepared to design each project with the ideal system to meet the needs of our customers at the best available prices.

Warmzone is a different kind of company.  Unlike a manufacturer, we do not favor one system over another.  We acknowledge the fact that there are dozens of brands and types of radiant systems that offer unique qualities, but no one system is the answer for every project.  We take great interest in your project goals, requirements and budget and then provide you with a quote for the best system available to complete your project.  We may suggest using an electric, hydronic or a combination of these technologies.  There are clear advantages and disadvantages to each system and technology.  We will explain why we prefer one system over another for your particular project.  At Warmzone.com, you can expect simple, honest explanations for our suggestions to you. 

Customer service is at the top of our priority list.  As with “Brown” or the “Golden Arches,” we would be nothing without you, the consumer.  We are committed to helping people install the latest in innovative radiant heat systems by providing:
            1.  High quality materials
            2.  Installation packages that simplify the work.
            3.  Design assistance
            4.  Installation advice and support.
            5.  The latest ideas in energy efficiency and alternative energy.
We are not satisfied until you are satisfied.  That, of course, makes perfect sense!

Radiant heat systems are constantly evolving – which can be a challenge when it comes to deciding which is the best system for your project.  You can be assured that Warmzone will consider every system and then offer you the best technology for your project.

Most of the systems we design and sell can easily be installed by any plumbing and heating professional or general contractor.  But if you cannot find either professional in your area, our products can be installed by any reasonably-competent handyman.  Custom design and engineering packages are also available to assure that you are getting off on the right foot with your heating investment. These plans take the guess work out of the installation and become a road map for your system for future reference or to pass on to the next home owner.  

We welcome your inquiries and are prepared to help you with your radiant heat decisions.   Warmzone is the only company matching individual heating projects to solutions that make sense among the wide variety of available choices.  We’re not “brown,” nor are we “gold,” but we are leading out to assure customers make the right choice in the ever-increasing radiant heating market. 

Visit us online at www.warmzone.com or speak with one of our representatives by calling us directly at 1.888.488.WARM

© 2006 Warmzone Media.  “What Can Brown Do for You?” is a registered trademark of United Parcel Service of America, Inc. “The Golden Arches” is a registered trademark of McDonald's Corporation. Additional copyrights and trademarks are held by their respective owners.

As demands for lower energy costs increase, 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.
In a nutshell, radiant heating is among the most efficient forms 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 radiant heater 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.

Radiant Heaters Tip:  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. 

Every available 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. However, on others, if the cable is embedded in mortar or concrete, any flooring can be installed on top of the concrete. When heating smaller areas, it is nearly impossible to beat the simplicity and price of an electric cable heating system.