Chimneys are notoriously variable affairs, usually built at the whim of the architect or builders. That means it is not uncommon to find asymmetry, nooks and crannies and the particularities of aging you would expect from any massive piece of construction. Leave one part unprotected and you can rest assure that is where your problems will originate.

Most masonry chimneys were not designed to handle the venting requirements of  modern high-efficiency heating appliances burning liquid propane, natural gas, oil, wood, pellet, or coal.  These improperly lined chimneys can cause a number of costly structural and cosmetic problems for the homeowner, and also create potentially serious safety hazards.

Secure Temp™ ASHT+

The Secure Temp^TM ASHT+ insulated stainless steel high-temperature chimney is listed to standards established for temperatures of 2100°F for venting solid-fuel, oil, gas and coal appliances.

Tested to UL 103HT in all diameters.

The Secure Temp^TM ASHT+ is also available in aluminum-zinc coated steel exterior casing.

• Coupler system, Twist-Lock assembly for fast and easy installation;
  no screws or other attachments required

• Double-lapped flue seam provides radial expansion; this prevents flue from separating or buckling

• Secura Plus-2 insulation, pressure-packed to retain high-flue temperatures; totally non-caustic and chloride free

• Available in 5" to 10" inside diameters

• 2" safety clearance from combustible materials with all diameters

• Available in 8", 12", 18", 24", 36" and 48" lengths

• 12" adjustable lengths also available

• Galvalume components that don't rust

• Lifetime limited warranty

Click here to download a brochure

• Tested to 2100°F and listed as 6" clearance from combustible materials
• Efficient: The double-wall black stove connector features a series of openings, allowing you to recover maximum heat from flue gases
• Can be used with all types of wood-burning stoves
• Available in 6", 7" and 8" inside diameters
• Finish is Forrest metallic black paint to match today’s stoves
• 10-year limited warranty