Chicago Brick Oven · Installation
CBO Venting + Install Prep: What Needs Finished Before First Fire
A CBO needs the full install done — support, insulation, venting, weather protection — before the first fire. Skipping any of these causes install failures that read like oven problems.
By Reed · Updated November 10, 2026
What you need
- Model-specific install manual
- Tape measure
- Framing square
Step by step
Confirm the support structure can hold the oven
A CBO-1000 freestanding is hundreds of pounds. The support (counter, base, pad) must be engineered for that load. Consult the model's manual + a local structural pro for custom installs.
Install the insulation layer per manual
Refractory ovens need insulation between the oven body and the surrounding enclosure to retain heat and keep the enclosure surface safe. Follow the manual's spec — don't guess at thickness or material.
Install the correct vent components
Pull the model-specific vent spec from the CBO manual. Vent diameter, length, clearance-to-combustibles, and termination height all vary by model.
Weatherproof the enclosure
For outdoor installs, flashing + sealant around the oven body prevents rain intrusion. Indoor installs still need the vent properly terminated through the roof to meet code.
Confirm everything is set before curing
Mortar, surround adhesives, concrete pad, every wet material must finish curing on its own schedule before the oven itself is fired for the first time.
Common mistakes
- Firing before mortar cures. Wet mortar + a hot oven = steam + cracks. Wait the manufacturer-spec time for the mortar to cure before any fire.
- Using chimney pipe from a fireplace install. Chimney pipe for a fireplace isn't necessarily what the CBO manual calls for. Vent components are model-specific — read the oven's manual, don't reuse unrelated chimney spec.
Hands-on tips
- Pull the install manual as a PDF from the CBO site and bring it to the mason / contractor BEFORE they start — verbal dimensions get mis-transcribed.
- Factor venting into the enclosure plan early — a vent termination that violates clearance can force the whole enclosure to be rebuilt.
Questions people ask
What size and type of vent pipe do I need?
The correct components depend on your oven model, its connection, and the installation. CBO publishes model-specific spec in each manual at chicagobrickoven.com.
What needs to be finished before I use the oven?
Complete the installation for your model, including its support, insulation, venting and weather protection. Then run the model-specific curing process before any high-temperature use.
Was this guide helpful?
Shopping for Chicago Brick Oven?
See Chicago Brick Oven products