Product Selection – Cables
4.2 Heatwave® Cable Selection
The Heatwave® Heating Cable comes in pre-established lengths that have been designed to deliver a specified watt density (see page 14 for models). To ensure that the Heatwave® Heating Element length purchased is the correct size for the project, complete this simple worksheet prior to beginning the installation process.
- Calculate Square Footage to be Heated.
Determine the square footage of the area to be warmed. Note: this is not necessarily the same as the room dimensions. Enter the total square footage on line A. - Determine Watts Per Square Foot.
Determine the Watts per square foot for the application. Heatizon Systems suggests the following Watts per square foot:- Floor Warming—8 to 15 Watts per square foot
- Space Heating—Watts per square foot and spacing between element runs should be determined by a heat loss calculation. Contact Heatizon Systems for information on how to obtain a heat loss calculation. Enter the desired total Watts per square foot on Line B.
- Calculate Total Watts. Calculate total Watts by multiplying Line A by Line B, and enter the result on Line C.
- Determine Input Voltage. Determine if the Heatwave® Heating Cable will be powered by 120VAC or 240VAC, and check the correct input voltage on Line D.
- Select the Correct Heatwave® Heating Cable Length. Use the table below to select the Heatwave® Heating Cable Model that is the correct input Voltage from line D, and will deliver the closest total watts calculated on Line C. Heatizon Systems recommends selecting the next larger Heatwave® Heating Cable Length if the total Watts calculated in Step 3 is between two models. Select the model number, and write the corresponding Element “Cable Length” on Line E.
- Calculate Element Spacing. Calculate the amount of space between the runs of element for the application and the Heatwave® Heating Element.
Heatwave® Cables, 120 VAC
| Heatizon Part Number 120V Input | Manufacturer Number | Total Watts | Total Ohms | Amp Load | Watts/ Foot | Coverage Area/Square Foot | Watts/ Square Foot | Cable Length | Cable spacing (O.C.) |
|---|---|---|---|---|---|---|---|---|---|
| HWC-815 | HWC2012-44 | 120 | 120.0 | 1.0 | 2.73 | 8-15 | 14-8 | 44′ | 2.5-4.5″ |
| HWC-1630 | HWC2012-77 | 240 | 60.0 | 2.0 | 3.12 | 16-30 | 14-8 | 77′ | 2.5-4.5″ |
| HWC-3260 | HWC2012-154 | 480 | 30.0 | 4.0 | 3.12 | 32-60 | 14-8 | 154′ | 2.5-4.5″ |
| HWC-5094 | HWC2012-203 | 750 | 19.2 | 6.3 | 3.69 | 50-94 | 14-8 | 203′ | 2.5-4.5″ |
| HWC-64120 | HWC2012-362 | 960 | 15.0 | 8.0 | 2.65 | 64-120 | 14-8 | 362′ | 2.5-4.5″ |
Heatwave® Cables, 240 VAC
| Heatizon Part Number 240V Input | Manufacturer Number | Total Watts | Total Ohms | Amp Load | Watts/ Foot | Coverage Area/Square Foot | Watts/ Square Foot | Cable Length | Cable spacing (O.C.) |
|---|---|---|---|---|---|---|---|---|---|
| HWC-1631B | HWC2024-86 | 245 | 235.1 | 1.0 | 2.85 | 16.31 | 14-8 | 86′ | 2.5-4.5″ |
| HWC-3260B | HWC2024-110 | 480 | 120.0 | 2.0 | 4.36 | 32.60 | 14-8 | 110′ | 2.5-4.5″ |
| HWC-56105B | HWC2024-242 | 840 | 68.6 | 3.5 | 3.47 | 56-105 | 14-8 | 242′ | 2.5-4.5″ |
| HWC-80150B | HWC2024-375 | 1200 | 48.0 | 5.0 | 3.20 | 80-150 | 14-8 | 375′ | 2.5-4.5″ |
| HWC-114214B | HWC2024-564 | 1710 | 33.7 | 7.1 | 3.03 | 114-214 | 14-8 | 564′ | 2.5-4.5″ |
| HWC-128239B | HWC2024-726 | 1915 | 30.1 | 8.0 | 2.64 | 128-239 | 14-8 | 726′ | 2.5-4.5″ |
Important: Tools and materials required
The following items may be required to install and test the floor heating system:
| Scissors | Tape measure | Wire strippers |
| Screwdriver | Tin snips | Utility knife |
| Plastic Cable Clips or Strapping | Hot glue gun | Multimeter |
Before Laying the Heatwave® Mat or Cable
Note: Measure the resistance between each conductor and the shielding/ground wire. Both should read infinity. Always complete a Heatizon Systems “Resistance in OHMS Form” (see form in the back of this manual) out of the box, immediately following the installation of the Heatwave® Heating Cable/Mat, immediately prior to covering the Heatwave® Heating Cable/Mat, and again just prior to energizing the Heatwave® Heating Cable/Mat.