The Problem: Millions of multiple flue chimneys exist that are not up to current masonry standards - which calls for a separation of 4 to 12" in vertical height for each flue. Our new (Patents Pending) products solve multiple problems including:

Two Caps can't fit and also present a downdraft hazard!


Boost-A-Cap allows easy installation of Two Caps
Easy to install - Available now! - 3 sizes, 8 x 8, 8 x 12, 12 x 12
Price: $79.00 includes shipping in USA. (Caps not included, but are available or existing caps will fit)
Visit this online store to order by MC/Visa and check the fit charts.
or: please email to extend@hearth.com with questions or comments.....

See a Video Demonstration of the Problem - Back to Extend-A-Cap Home - To Extendaflue Decorative Chimney Extensions and Caps