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# Surface calculator

Tips on selecting the appropriate size heating system:

- You will never need the same size system as the surface area of your floor covering, which is why you must read the following tips carefully.

- Determine if you want your system to be used as a primary source of heating, or as a secondary source of heating, for comfort.

- If you want your system as your primary source of heat, you will need the cable to be installed at 3" (76 mm) spacing. If it's for comfort, as a secondary heat source, then you can instal your cable at 4" (102 mm) spacing.

- Make sure you that you take into consideration that the cable must be at least 3" (76 mm) away from all walls and fixed objects (e.g., cabinets, vanities and shower stalls).

- Never install the cable under any fixed object, as excessive heat could build up causing damage to the heating wires and possibly even a fire.

- Minimum spacing away from any plumbing drains should be 6" (152 mm), and 8" (203 mm) away from any heat source (e.g., baseboards, heating vents and fireplaces).

- Always plan for excess cable by locating buffer zones. Buffer zones are areas of the room where heating can me modified without compromising the total comfort of the room, such as beside toilets and adjacent door openings.

- Never cut your heating cable, as this will change the resistance of the heating wires and could cause an electrical fire.

- Check with your electrician if the voltage supplied to the room is 120V or 240V; the voltage of system selected must the same.

# Precise measurements the key to a successful installation !  Steps to follow to calculate the area to be heated:

Room sketch
• Make a scale diagram of the room and calculate the total surface area.

Permanent fixtures

• Calculate the surface area of the permanent fixtures.
• Subtract the surface area of the permanent fixtures from the total surface area (don’t forget to calculate any angles if the walls or permanent fixtures are not square or rectangular).
• The result is the maximum area to be covered.

Buffer zones
• Provide space for buffer zones (area not necessary to heat) where you can place any excess cable.
• Subtract the buffer zone areas from the maximum area to be covered.
• You will get the minimum area to be covered.

* All measurements should be taken in inches, to insure a more precise calculation.