Furnace, Water Heater Vent Pipe Clearances and Locations

Gas burning appliances vent pipes produce heat when discharging exhaust gases to exterior.
Temperature of the vent pipe is transferred to the surrounding area and all the materials that are in the vent pipe vicinity. Problems start arising if those materials are combustible and located to close to the furnace, water heater vent pipe. If you apply heat to a combustible material for some period of time (that varies between materials), its point of ignition will gradually get lower and eventually little heat will be required to start a fire – that’s why you need a clearance between the vent pipe and a combustible material.

Solid (Wood/Coal) Fuel-Burning Stove Chimney Venting

As with every fuel-burning appliance, proper venting is always critical, and to enjoy your solid (wood/coal) fuel-burning stove, you have to get it right. This guide is just an explanation of basic safety / code requirements for the solid fuel burning stoves. However, you should always consult stove installation with your local building code enforcement … Read more

High Efficiency Furnace Plastic Vent Pipe Types

Plastic vent pipe types listed below have been certified by the American Gas Association for use in furnaces classified as Category 4. These particular types of furnaces use positive pressure vent systems (exhaust gas temperature less than 1400F above the dew point temperature) and are always equipped with an induced draft motor which removes exhaust … Read more

Gas-Appliance Chimney Placement and Termination

Furnace and / or water heater chimney requires proper placement and termination to safely discharge exhaust gases from the appliances combustion (fuel burning) process. Improper chimney placement and termination is often responsible for back-drafts, excessive corrosion of the chimney pipe walls, condensation, and Carbon Monoxide contamination of your house.
The rule explained on the pictures is just one of the several that have to be applied when installing the chimney. Make sure that you have a licensed professional performing gas water heater & furnace flue sizing calculations while replacing or adding any of those appliances in your home.
Natural (gravity) and motor […]

Brick Chimney Crown – Almost Never Done Right

Brick Chimney Crown

A brick chimney crown – also known as a chimney termination cap, cement wash, or just a chimney cap – seals the chimney top opening around the flue and sheds rainwater / prevents moisture from deteriorating the chimney.
For the chimney crown to fulfill its purpose, it must be properly shaped and installed.
Unfortunately, after looking at hundreds of brick chimney on new and old houses, I’m wondering if the actual purpose of the chimney crown is ever taken into consideration. The overall appeal of the chimney crown and its complement of the house’s structure from the moment […]