Chimney Services in Monroe Township (Middlesex County), NJ

What the numbers suggest for chimneys in Monroe Township

Census estimates place 43% of Monroe Township's 22,419 housing units in 2000 or later and another 29% between 1980 and 1999. Only about 6% predate 1960. Factory-built fireplaces and metal vent systems became common in homes of these decades, so the parts that need checking tend to be a sealed firebox, a glass front, a vent pipe and its termination cap rather than brick and clay tile.

Heating here leans electric compared with nearby towns: 31% of occupied homes use electricity and 66% use utility gas, with fuel oil near 1%. In Woodbridge and East Brunswick the electric share is about 10% to 11%. In an electric-heated home, a gas fireplace may be the only appliance in the house that burns fuel, which makes it the main reason to keep a carbon monoxide alarm working.

Attached homes account for about 26% of units, against 63% detached. For a townhouse or condominium, the vent termination on the outside wall or roof may belong to the association, so check your governing documents before arranging exterior work. These figures describe the township, not any particular fireplace.

How a direct-vent gas fireplace breathes

A direct-vent fireplace is sealed off from the room. One manufacturer's installation manual, for the Heat-N-Glo HV-CDN model, says the unit is designed to draw all of its combustion air from outside the building and that the glass door assembly must be in place and sealed. The vent usually runs as a pipe within a pipe: exhaust goes out through the inner pipe while fresh air comes in around it, through a cap on an outside wall or the roof. The three venting types are compared in direct-vent, B-vent and vent-free gas appliances.

Because the system is sealed, the glass and its gasket are part of the venting. The same manual warns against operating the fireplace with the glass door removed, cracked or broken, and against striking or slamming it. A cracked panel or a door that no longer seats properly is a reason to leave the fireplace off until it has been repaired.

Between check-ups, and at the yearly service

A few checks are simple and safe for a homeowner:

• The outside vent cap. The manual asks owners to inspect it regularly so that no debris interferes with air flow. Leaves, nests, drifted snow and shrubs grown up close are examples of what to look for.
• The flame and the glass. A change in flame color or height, new sooting on the glass, or an unfamiliar smell is a reason to shut the unit off and have it looked at. The same goes for a pilot or burner that will not stay lit; gas controls are not something to adjust yourself.
• Hot glass. The manual tells owners to alert children and adults to the hazard of high surface temperatures; our page on gas fireplace glass and children covers barriers and habits.

The manual also recommends that a qualified service technician check the appliance at the beginning of each heating season. Our gas fireplace service covers the unit, its glass seal and its vent, for fireplaces connected to an existing gas line.

Local questions

Sources

1. U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates (tables B25034, B25040, B25024), via Census Reporter
2. Heat-N-Glo HV-CDN direct vent gas fireplace installation manual (PDF)
3. U.S. CPSC: Carbon Monoxide Information Center