DirectVent Pro is a unitized, coaxial venting system designed for use with direct vent gas or propane stoves, heaters, and fireplaces.

A very small amount of the sealing gas passes through the primary seal and out the primary vent. An even smaller amount (typically less than 0.1 SCFM) of sealing gas passes through the secondary seal ...

If what you want is a simple, no-frills gas insert, this is a phenomenal vent-free value. Pros Cons $459.99 at Walmart If you have 1,000 square feet or less to heat, a customizable solution is a ...