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 Heaters Tip: When heating smaller areas, it is nearly impossible to beat the simplicity and price of an electric cable radiant heating system.

With a name like Warmzone, we have an unspoken obligation to live up to the task of matching our customers to the best available system of warmth and comfort.  We strive everyday to ensure that our products and our knowledgeable, dedicated staff will leave memories of service that is second to none, and products that will provide years of enjoyment.

A brief history of Warmzone allows consumers to understand why Warmzone was created. Warmzone realized the growth in the radiant heat industry was causing problems for consumer and contractors due to the abundance of technical information and product choices. Making the right choice for a radiant heat system is crucial and carries serious implications to its cost and effectiveness.  Serving as an intermediary between manufacturers, contractors and consumers, Warmzone’s role is to match individual needs of a project to a heating system that makes the most sense.  We strive to match our customer’s needs with the finest radiant heating systems available.  Warmzone.com offers non-biased, individualized solutions that factor the installation, durability, performance and operational investment as the key criteria for our customers.

There are several variables that Warmzone considers when looking at a project.  Some of these variables include:  square footage, the type of floor covering, the amount of heat needed for a given area, whether that heat will be the supplemental or primary source, how well insulated that environment is, and if it is a major remodel or completely new construction.
           
Based on this criterion, we can then discuss the benefits of a radiant heating system and which technology would be most appropriate for a consumer in terms of effectiveness, efficiency, operational costs and overall upkeep and maintenance.

Because radiant heat is relatively new in the United States, there is a continuing need to educate consumers about a wide variety of radiant solutions.  In the interest of avoiding confusion and finding the best possible application, Warmzone has done most of the homework for our prospective customers.  Our professional consultants learn the details regarding your heating goals and then propose a system that can be easily installed and will fit your budget.  Warmzone continues to strive toward being viewed as the premier radiant provider.  “We want customers to feel confident in this market and receive honest information and pricing regarding the best available products,” says Brandon Weaver, Vice President of Sales.

With so many options in the radiant industry, Warmzone.com is helping contractors and consumers with the pros and cons of each system.  Representatives of Warmzone suggest the best possible system for any project.  We are not tied to any one manufacturer and will provide the very best in pricing and information available.  Warmzone has a very direct relationship with select manufacturers thus eliminating the ‘one size fits all’ sales pitch normally received by homeowners. Using various forms of technology, Warmzone’s focus is to provide customers with the most pertinent information in record time. We know this is the key to establishing trust and long term partnerships.

As heating costs skyrocket, radiant heating continues to come to the forefront.  We at Warmzone excel in providing options that are affordable, convenient and specifically tailored to the needs of individual consumers.  As we match products with needs, we continually strive to provide our customers with “warm, pleasurable” heating experiences.  After all, feeling warm IS a wonderful thing!

We would welcome the opportunity to serve your needs. Visit us at www.warmzone.com, or call us directly at 1-888-488-WARM.       

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.

Mostly the radiant heat panels are attracted to the sub floor using approximately 10 screws per panel. Manufacturer recommendations include screwing and fastening adhesive when installing the panel. An electrometric bonding material is placed in the grooves prior to tube installation. The tube is pressed into the groove flush with the surface of the panel. Though the installation does not take much time, you may want to consult the professionals at warmzone.com if you’re considering installing your own radiant heating system.

Why Settle When you can Customize?

Finding a Radiant Heating Solution as Unique as You Are

As temperatures plummet and heat bills skyrocket, consumers everywhere are turning to radiant heating systems. As the most affordable and customizable option out there, radiant heating is quickly making a name for itself as a titan in the heating market.

So radiant heat is the latest and greatest, but what exactly is so great about it and what can it do for you? One word: customization.

When it comes to radiant heating, the possibilities are endless. No matter what you want or where you want it, Warmzone can design a radiant heating system completely customized for your lifestyle, and it’s as easy as 1,2,3.

1. Choose

The first step of your radiant heating revolution is choosing the type of radiant heat you want.

There’s no limit to what radiant heating can do. Whether you’re looking to warm up your home or prevent snow and ice buildup on your property, there’s a radiant heating option that’s sure to fit your needs.

Indoor Radiant Heating
Turn any room into a cozy paradise with radiant floor heating. Radiant heating can go under virtually any surface, including tile, carpet, wood, etc. Put it in your bathroom, your kitchen, your living room—anywhere you need heat. Each room, or zone, can be controlled with its own thermostat. Given the flexibility and outstanding effectiveness of radiant heated floors, it is the most affordable way to keep your house perfectly warm without racking up the electricity bill.

Outdoor Radiant Heating
You can also enjoy the benefits of radiant heating outdoors. Radiant snow melting systems keep your property safe by preventing snow and ice buildup. You can choose one or all of the following options to make your life a little easier in the harsh winter months:

• Radiant heated driveways
• Heated sidewalks
• Roof deicing and gutter melt
• Pipe tracing

2. Design

Once you decide which radiant heating options are right for you, the Warmzone team will help you design a customized plan of action. We realize that your radiant heating system isn’t the same as the next customer’s, so we work diligently with you to come up with a radiant heating system tailor made to your needs.

Once we assess your project’s requirements, our team will design a custom CAD drawing of your radiant heating system telling you exactly what you get, where you’ll get it, and how much it will cost you. We’ll keep you involved in every step of the process to make sure that your custom radiant heating system exceeds your expectations.

When we’ve got your customized radiant heating system designed, we’ll make sure you have everything you need for a quick and easy installation. If you’re not comfortable doing it yourself, we’ve got a list of contractors ready to bring your radiant heating plans to fruition.

3. Enjoy

Because we help you with the planning and design process, you’re only job is to sit back, relax, and enjoy your custom radiant heating solution. Let your heated floors warm your home evenly and efficiently. Sit back and watch from the warmth of your living room as your radiant heated driveway does the shoveling for you. And sleep in peace knowing that your gutters and pipes are safe from nasty and potentially devastating snow and ice buildup.

Why settle for an out of the box heating solution? Let us help you customize a radiant heating system that meets your needs, fits your budget, and keeps you and your family warm and safe. 

We’d risk a guess that 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 is radiant floor heating, which, as opposed to warm air systems, delivers the source of heat upwards from the floor level, not from 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 heat efficiently radiating outwards, 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.

It might be hard to believe, but under floor heat was 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.

If you’re looking for efficient, comfortable heat for your home, radiant floor heating could the solution you’ve been looking for. 

Radiant Heaters Tip: 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.