Overview
VenTubes are small stainless steel tubes that give a masonry chimney cross ventilation. In chimneys with a large cavity around the flue liner, moisture condenses on the inside of the outer walls and causes efflorescence, spalling and freeze/thaw damage. Saver Systems says VenTubes can eliminate up to 85% of the moisture that damages these chimneys. Buy from StoveSource and pay no sales tax in any state.
How many you need
- Cavity less than 16": generally 4 VenTubes, two in each narrow side of the chimney, 4 to 6 courses down and about one brick length apart.
- Cavity greater than 16": generally 8 VenTubes, four in each long side, 4 to 6 courses down from the top, two on each side of the flue liner.
How to install
Drill a 1/2" hole into a mortar joint, angled slightly upward to keep out blowing rain. Push the tube in until the screen is flush with the brick, then seal it with a small bead of clear silicone caulk.
Do not install in chimneys with damaged, cracked or misaligned flue liners, or below the roof line or other combustible exposures.
Specifications
- Pack: 12 tubes, part number 300182
- Material: 100% 304 series stainless steel
- Size: 1/2" diameter x 4 1/2" long
- A wire screen welded in the front keeps insects out
Data sheet: VenTubes product sheet and instructions (PDF)
More: chimney sealer guide · chimney repair and waterproofing products
Why buy from StoveSource: Authorized dealer · No Sales Tax · Free shipping over $300 · Email or text 1-888-866-8206
Shipping & Returns
Free shipping on orders over $300 · ships in 1–3 business days.
Free shipping on orders over $300 to the continental US; a flat $24.95 shipping fee applies to orders under $300. Accessories and parts ship by parcel carrier (UPS, FedEx, or USPS), typically in 1–3 business days.
Returns. Unused, uninstalled items in original packaging can be returned within 30 days, subject to a 15% restocking fee.
Sold by StoveSource (authorized dealer). Ships directly from the brand's authorized distributor warehouse — see our Authorized Dealer page.