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Customer Q&A with Product Specialists

Brian P. from Florida, Tampa Bay asked:
When wind-driven rain blows into the chimney cap and goes down the flue and the shafts that hold the flue, where does the water go besides the fireplace itself?
When wind-driven rain blows into the chimney cap and goes down the flue and the shafts that hold the flue, where does the water go besides the fireplace itself?
Provided you have no leaks or loose joints in the manufactured chimney, the precipitation will be in the fireplace itself or on top of the firebox, in addition to the inside walls of the chimney.
Answered by: Tyler M. - NFI Master Hearth Professional

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Larry K. from Lewes delaware asked:
I was told you should never put a chimney cap on an oil-fired furnace. Is that true?
I was told you should never put a chimney cap on an oil-fired furnace. Is that true?
You can indeed use a stainless steel cap suitable for a class A chimney on such a system.
Answered by: Tyler M. - NFI Master Hearth Professional

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Madison M. from VA asked:
Do you not sell an extra-large cap, specifically for a 37x64 inch crown?
Do you not sell an extra-large cap, specifically for a 37x64 inch crown?
We do not currently stock a chimney cap sized to fit a 37x64 inch crown, as our standard outside-mount caps do not reach that size. However, we do offer custom-fabricated chimney caps that can be made to your exact dimensions. Before we can provide a quote, we need to confirm the mount type. A top/surface mount cap sits over the flue opening, while an outside mount cap wraps over the entire chimney crown, which sounds like what you are describing with a 37x64 inch crown. Custom caps are available in stainless steel or copper, with lid styles of Basic, Hip, Hip and Ridge, or Hip and Ridge with Standing Seams. You can also specify lid pitches from 3/12 through 12/12, and screen heights from 4 to 24 inches (the screen must be at least 6 inches taller than your tallest flue). Do you want a top/surface mount cap or an outside mount cap?
Answered by: Tyler M. on Aug 24, 2026

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Terrence from Louisiana asked:
I need an electric chimney fan cap to help pull smoke up.
I need an electric chimney fan cap to help pull smoke up.
We do offer electric draft-increasing chimney caps that feature adjustable electric fans to help pull smoke up your chimney. These are typically more expensive and we recommend professional installation due to their complexity. They are generally designed for factory-built metal chimneys, but adapters may be available for masonry types. Could you please provide the size, shape, and material of your flue (e.g., is it a brick/masonry chimney or a metal/stainless steel pipe)?
Answered by: Tyler M. on May 12, 2026

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About Chimney Caps and Covers

You should have a chimney cap if you've got an active chimney. Chimney caps help keep critters and debris out while keeping sparks and embers in. If you don't have a chimney flue cap, your chimney might also be compromised by weather damage like rust or mold. Copper chimney caps also enhance the outer appearance of your flue pipe. If you'd like to learn more about your need for a flue cap, check out our Chimney Cap Buying Guide for everything you need to know about a chimney cover!

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