Frequently Asked Questions

How do I know what size my stovepipe is?
Since it is impossible to measure across the diameter of an installed pipe, measure the circumference of your pipe with a flexible tape, or wrap a string around it and measure the string. Then divide by 3.14; that will give you the diameter. Better yet, enter your circumference measurement in the form on the main page, and the wizard will take you to the right product.
How many sets can I install on a pipe?
 One set of six bands will cover 9" of pipe length.  You may put on as many bands as you wish or have room for.
Are the bands adjustable for length and fit?
Yes, they may be stretched a little to fit. Or you may pinch the loops to make them a little shorter.
How easy are they to install?
They attach quickly and easily to your stovepipe. No screws or tools are needed. The ends lock into each other. It takes about 5 minutes to attach all six radiators.
Do you combine shipping on multiple orders?
Yes, order any quantity of sets. You will only be charged shipping for a single set. (on US orders - for international combined shipping see order page)
Do I have to worry about the rings giving off fumes?
No, to give off fumes, the boiling point of zinc has to be reached (1650 degrees F / 900 C). The temperature of the stovepipe never gets anywhere near hot enough.
Do you have a return / replace / refund policy?
Yes, you may return them for a full refund. Or, if you get the wrong size, you may return them for the right size. (send an email message)
How can I maximize the heat coming from my stove?
1. Consider installing a damper in the stovepipe to slow down the escape of the heat (and smoke) to control how fast it escapes. It allows you to "dampen down" the fire by partially restricting the ventilation. (but, dampened too may smoke). 2. Install as many radiator rings as you have room for. 3. Place a fan at the base of the pipe blowing upward to increase air circulation and heat transfer from the rings. Blowing upward is best because heat (and air) is already moving upward along the hot pipe.
Placing a fan above the pipe, blowing downward would not be good as it will counteract the air flow. If you want to bring warm air down from the ceiling, do it away from the stove.
I have a custom size pipe. Can I order a custom size set?
Yes, email us. Email:
Do you ship internationally?
Yes, but there is a charge for extra shipping for international orders.
Can I paint the rings black without affecting heat transfer?
Yes, but only paint the outside surface that shows. Don't paint the inside which makes contact with the stovepipe.
Can I mount the rings with a thermal epoxy to increase heat transfer?
Yes, it does help, but is messy to accomplish.
Which material is better for heat extraction?
Copper has about twice the thermal conductivity as aluminum, see chart:

Common metals ranked by thermal conductivity

Rank Metal Thermal Conductivity [BTU/(hr/ftâ‹…/F)
1 Copper 223
2 Aluminum 118
3 Brass 64
4 Steel 17
5 Bronze 15