A: VO-rated plastic is flame resistant plastic made of materials that deliver flame protection above and beyond industry standards.

A: The only time the timer function is enabled is if you press the timer button. If you do not want to use the timer function, turn the unit on and set a temperature (if desired) and just don't press the timer button at all.

A: You should avoid the use of an extension cord as it may overheat. However, if you have to use an extension cord, be sure it is a polarized cord of 14 AWG minimum and rated no less than 1875 watts.

A: Our heaters do not disassemble for cleaning. Be sure your heater is in the OFF position. Unplug the heater before cleaning, and wait for it to cool. Use a soft, dry cloth to clean only the external surfaces.

A: Some of our heaters have a Caution Light which will illuminate if an object is obstructing the heater. If your Caution Light is on, remove any objects which are too close to the heater and obstructing the flow of air through the element. After Removing the object(s) you should unplug the heater for about 20 minutes and then plug it back in.

A: The wall unit is gauged to read the whole room temperature, while the unit is only gauged to read the air that passes through the unit. As you run the unit for a longer time, and it heats up the room, you will notice that this difference will become very minimal.

A: All of our heaters operate at around 1500 watts. This amount of electricity may cause your cord to become warm - this is normal. You should be able to put your hand around the cord and feel that it is warm to the touch, but it shouldn't be too hot to handle. If the cord is so hot that it is hard to hold in your hand, then there may be a problem with the outlet the heater is connected to. A loose fit in the outlet will cause the plug to overheat, as is stated in all of our heater manuals. If your cord becomes too hot to touch, discontinue use immediately and contact a qualified electrician to inspect the outlet before any further use.

A: You can determine the room size your heater will heat by using the following formulas:

First off, you need to calculate the number of BTU's generated by your unit. You will need the wattage of the unit to do this. Multiply the wattage of the unit by 3.41 to get the BTU's of the unit. (Almost all heaters will be 5120).

Next, you will need to determine the number of BTU's you will need to do the job you want. Multiply the square footage of the room by the difference in temp (Beginning temperature and desired temperature) and you will get the BTU's required to heat the room to the temperature you desire.

If this number is lower than the BTU rating of the heater, the heater will do the job. If the number you calculate is higher than the rating of the heater then you will need additional heater(s). (BTU= (Desired Temp-Starting Temp) x Square Footage of room)

Please keep in mind this is based on perfect insulation and depending on the customer's insulation, outside temp, windows, drafts, ceiling height, etc... this number may vary

A: The cost of running your heater depends on the price your electric company currently charges you per kilowatt hour. The average cost per kilowatt hour in the U.S. is approximately 8¢. The formula for determining the cost of operation is as follows: (Wattage x .001) x Cost per Kilowatt Hour = Cost to operate

A: Portable heaters are quick to heat, fully controllable and easy to use. Portable heaters can be a cost effective alternative to switching on the central heating - especially if you wish to focus heat on perhaps just one or two rooms. The beauty of portable heaters of course, is that you can move them around to where is convenient for you. Now you can stay warm wherever you are in the house.

A: Ceramic heaters use a fan to draw air through a special conducting ceramic element and distribute it throughout a room. Compact and light weight, ceramic heaters are safe because the ceramic element never gets hot enough to start a fire, although small areas of the grill can become hot to the touch.

A: A convective heater works by moving hot air around the room either by fan or encouraging natural air currents. They are the best choice for quickly warming larger spaces and keeping them warm. Convective heaters include electric – element, liquid filled and ceramic types.

A: Relatively inexpensive and mechanically simple. These heaters operate by moving air over heated wire or coil elements inside the heater, either with a fan or by natural air currents. They are not good at spot heating, as most of the heat is absorbed b the air to raise the air temperature.

A: Liquid filled heaters use an electric element to warm water or oil which in turn heats a radiator creating natural convective air currents in the room. The thermal mass of liquid holds heat well, minimizing fluctuations in temperature. While liquid-filled heaters maintain their heat for a long period, they also take longer to heat up and therefore are no more efficient than non-liquid filled models.

A: No, heaters are not intended for use in the bathroom, laundry areas and similar moist indoor locations. Never locate a heater where it may fall into a bathtub or other water container.

A: No, do not run the cord under carpeting. Do not cover cord with throw rugs, runners or the like. Arrange cord away from traffic areas where it will not be tripped over.

A: No. To prevent overloading a circuit, do not plug the heater into a circuit that already has other appliances working.

A: No, not all heaters have polarized plugs.

A: A polarized plug's (one blade is wider than the other) purpose is to reduce the risk of shock. This plug is intended to fit only one way in a polarized outlet.

A: Place the heater on a firm, level surface free from obstructions.

A: To use the unit as an air circulator without heat, turn the Power knob to FAN and the Thermostat to its highest setting. Putting the thermostat to it's highest setting permits the unit to stay ON. It will not emit heat.

A: If your heater shuts off unexpectedly or fails to operate, one of your heater safety features may have been activated to prevent overheating. -Be sure it's plugged in and that the electrical outlet is working - Check your Thermostat setting. The unit may simply be off because you have reached your desired heat setting - Check for any obstructions. If you find an obstruction, turn the heater OFF and unplug it. Allow the heater to cool completely, then remove the obstruction. Wait at least 10 minutes, then re-plug in the heater and follow the OPERATING INSTRUCTIONS for your unit.

A: The controls. The HZ-519 has digital controls and the HZ-515 has manual knobs.

A: High - 1500 Watts Medium - 900 Watts Low - 600 Watts.

A: When the SafeGuard Alert Heat Indicator Badge located on the Grill changes from Black to Red the grill is hot to the touch. Do not touch the grill until the unit has been turned off and the SafeGuard alert badge has turned back to black.

A: The Ceramic Heaters are best for a home with children. The Grill stays cool because the heater is incased in a plastic that keeps it cool to the touch.

A: No, it emits convection heat. This means you won't hear or see anything, you would just feel the heat.

A: You can register on-line at www.kaz.com or complete and return the Customer Response Card within 7 days.

A: No, defects that are the result of normal wear and tear will not be considered manufacturing defects under this warranty.

A: No, it does not.