Class-A Chimney Systems - The First Choice for New Chimneys!


Wood Stove Single Wall Stove Pipe


Wood Stove Double Wall Stove Pipe

Double wall stove pipe is typically used to reduce the distance to combustible materials or when your stoves makes a rise of greater than 6' to the chimney by helping to ensure better draft. Mazzeo's stocks ICC's UltraBlack double-wall (type E) stove pipe in a variety of lengths and elbows.

There are four primary advantages to ULTRABlack over single wall connector pipes:

It offers reduced clearance to combustible materials.

It is designed to last the lifetime of the stove and/or chimney system.

It offers reduced creosote formation.

It is certified for use with mobile home stoves.

Mazzeos stocks 6" and 8" Ultra Black venting.

Direct Vent Gas Stoves & Gas Fireplace Venting

Direct vent gas venting is co-axial, meaning that it is a pipe inside of a pipe. The interior pipe is used to exhaust flue gases while the space between the inner pipe and the outer pipe is used to pull combustion air into the gas stove or fireplace. For this reason, direct vent gas stoves and fireplaces do not use combustion air from within the home. Unlike wood stove pipe and chimney, gas venting is used both as chimney and connector pipe, and is commonly referred to as "DV pipe". As with chimneys, components such as insulated wall thimbles, must be used in accordance to the manufacturers instructions. Gas stoves and fireplaces are always listed and approved to specified venting systems by type and by manufacturer, and components from various vent manufacturers should not be mixed. Mazzeo's sells direct vent gas venting from a variety of different manufacturers, and stocks ICC ExcelDirect Vent.

Co-Linear Aluminum Liners for Direct Vent Gas Fireplace Inserts

If you are venting a direct vent gas fireplace insert into an existing masonry chimney, you will not use co-axial direct vent pipe, rather you will use two aluminum liners, one for exhaust and one for combustion air intake. Aluminum liners tend to be less expensive than co-axial direct vent pipe, and Mazzeo's offers very affordable pricing on aluminum liner kits.

B-Vent Liners for B-Vent Gas Stoves 

If you would like to purchase a gas stove and vent it into an existing chimney, the state of Maine does not permit using the air space inside the chimney to draw combustion air.  Therefore, if you're considering venting a direct vent gas stove into a chimney, be prepared for additional venting costs as you will need to convert the venting system from co-axial direct vent to co-linear liners and back to co-linear at the chimney top.  Such conversions add hundreds to the cost of the installation, which is why we recommend that you consider venting a B-Vent gas stove into your chimney.  B-Vent gas stoves exhaust into your chimney via a single 4" aluminum liner, which is affordable and easy to install. Unlike direct vent gas stoves, B-vent stoves draw combustion air from within the room, thus the installation space must have adequate air volume.  B-Vent gas stoves, such as the Jotul GF 300 BV Allagash   and the Jotul GF 400 BV Sebago   are very popular here in Maine as many people do have chimneys and would like to make use of their existing hearth for a gas stove instead of a wood stove.  In this situation, a B-Vent gas is a great option. In addition, if the clay liner in the chimney is defective, lining it with 4" aluminum liner is much less expensive than relining it with an insulated, 6" steel liner. 

Pellet Vent

Pellet vent is used to vent pellet stoves and is used as both connector pipe and chimney. Mazzeo’s stocks EXCELPellet   by ICC, which:

  • Has a laser-welded stainless steel flue, which resists corrosion from all agricultural products, such as corn.
  • Has a laser-welded galvalume steel outer casing, which is much more corrosion-resistant than galvanized, and is designed to be painted.
  • Has a lifetime warranted, pure silicone gasket, which is 100% leak proof, eliminating the need for field application of silicone or cement.
  • Has a smooth, clean exterior finish that looks like single wall pipe.
  • Is very easy to paint in the field.

Steel Liners for Masonry Chimneys

Traditionally, chimney have been made out of brick and mortar or cement block and mortar with clay tile flues. These chimneys are referred to as masonry chimneys, and the clay liners are installed when the chimney is being built. While durable, over time (usually over 20-30 years) the clay liners in the masonry chimneys will crack and degrade, and when they do, the chimney is no longer a code-compliant chimney. If the cracks are accessible, they can be repaired, but if not, then the chimney needs to be relined with steel liner. If the tile liner in the masonry chimney is not code compliant, then it must be removed and the steel liner must be insulated. It is possible to purchase a pre-insulated liner or to glue an insulation blanket around the liner and wrap it with a steel mesh. The insulation keeps the heat off of the interior of the chimney in the same manner as a tile liner ensuring better draft and protecting the chimney from the combustible material around it. In the state of Maine, wood stoves and fireplaces inserts must have a minimum cross-sectional diameter of at least 6". Mazzeo's sells steel liners and liner kits from a variety of different manufacturers at very affordable rates. If you need more information regarding how to line your masonry chimney, email: