FAQ

Q: Is The Rock Fan available for grants such as LWCF (Land and Water Conservation Fund) or RTP (Recreational Trial Projects)?
A: The Rock Fan is available for all LWCF grants and some of the larger RTP.  If you have another grant you are working on and would like to know eligibility, please contact us and we will find out. 

Q: How can I view the status of my order?
A: Go to the Customer Service, Account Information page. This page lists all your orders. Click the date of the order whose status you wish to view.

Q: What are your shipping costs?
A: You can view an estimate of shipping costs by viewing your cart with some of the products. However, final shipping costs will be determined and a email or phone call to you will confirm the order.   We will post once all shipping estimates are received.

Q: Can I color my custom rock to match the natural rock in my area?
A:  Yes you can.  On custom orders you can send in a high resolution picture of your natural rock and we will color to the picture.  You can also color the rock yourself with stains available from us.  This will usually save around $100 off you price and its a fun easy project.  You can not mess it up. If you do not like the color you simply take it back to the original gray color and start over.  You can even get moss to grow on the custom units.

Q:  Can I order accent pieces or just fake rocks from "The Rock Fan"?
A:  Yes

Q: How long does it take to get a custom rock fan?
A: Please allow up to 8 weeks.  We may have them ready within a few weeks.  It will really depend on the time of year and how busy we are.

Q:What is infrared (IR) radiation?
A:Infrared radiation is safe, invisible electromagnetic radiation that transmits energy from a hot object to a
cooler object at the speed of light. When infrared radiation is absorbed by the surface of an object, the
radiation warms the object by increasing molecular movement.

Q: What technology has Radiant Optics developed?
A: Radiant Optics has developed a revolutionary series of high intensity infrared heaters called HotZONE™
heaters that produce and focus infrared radiation using a patented IRLensTM. Radiant Optics'
HotZONE™ heaters are the only heaters that truly focus infrared radiation and can perform spot heating.

Q: What are the components of a HotZONETM heater?
A: There are two major components. The first is a high efficiency gas or electric infrared generator that
converts a high percentage of its input energy into infrared radiation. The second is the IRLensTM, which
focuses the infrared radiation into a beam or a spot.

Q: How do the heat patterns differ between infrared heaters with and without a lens?
A: An IRLensTM increases the amount of infrared energy in the central beam of a HotZONE™ heater by 3x
to 5x that of a conventional heater by capturing the energy from the shoulders of the radiation pattern. As
a consequence, there is a sharp cutoff between the center and the shoulders of the beam.

Q: Others claim to have reflectors that direct heat - why is the IRLensTM different?
A: Conventional reflectors are too small relative to the size of the infrared source to do a good job focusing
the infrared energy. The IRLensTM cleverly collapses a large reflector down into a low profile grid that
does a much better job focusing the infrared energy.

Q: Why does a heater with an IRLensTM work better than a heater without a lens?
A: The IRLensTM concentrates and directs a greater portion of the infrared energy to the spot that needs to
be heated. As a result, the heater can be mounted a greater distance from the spot to be heated. The
difference between an infrared heater with and without a lens is similar to the difference between a light
bulb and a spot light. A traditional infrared heater is like a light bulb. The heat generated by the heater
goes in all directions. With an IRLensTM, the heat is focused in a specific direction resulting in sharp
edges between heated and unheated areas and a much greater percentage of the heat being delivered
to the intended target. It should be noted that not all applications need spot heat, but all spot heat
applications benefit from the application of an IRLensTM.

Q: What are the advantages of a sharp cutoff between heated and unheated areas?
A: The greatest advantage of a sharp cutoff between heated and unheated areas is efficiency. With a
focused beam a high percentage of the radiant energy is delivered to the target.
Several applications benefit from a sharp cutoff of delivered energy. Workers along the conveyor of a
frozen food plant and spectators in the seating area around an ice skating rink are two examples where it
is beneficial for the people to be heated, without heating surrounding areas. In paint and composite
curing areas there is great benefit to having the employees much cooler than the heated object. 

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