Chimney Services in Fair Lawn, NJ

What the numbers suggest for chimneys in Fair Lawn

About 55% of Fair Lawn's 12,500 housing units were built from 1940 to 1959, according to Census estimates, and another 18% are older still. A house from those decades can have one masonry chimney doing two jobs: a fireplace flue and a flue for the basement heating equipment. Our guide to chimneys with more than one flue shows how that arrangement works.

Utility gas heats about 81% of occupied homes. Propane accounts for about 5%, fuel oil about 4% and electricity about 8%. Gas and propane furnaces, boilers and water heaters that vent into a chimney depend on a flue that is the right size for them, which is why equipment upgrades raise chimney questions.

Roughly 76% of units are detached houses, 5% are attached, 9% are in two-to-four-unit buildings and 11% are in buildings of five or more units. In a two-family house, more than one household may depend on the same chimney.

Why new heating equipment can leave the old flue mismatched

DuraVent's guide to relining chimneys for gas appliances describes two problems that follow an upgrade. First, an efficient gas furnace discharging into a relatively large masonry flue can produce poor draft, because its cooler exhaust loses buoyancy on the way up. Second, low-temperature exhaust can condense on cold flue surfaces, and the condensate attacks masonry from the inside.

A common version of this is the orphaned water heater. A high-efficiency furnace is installed with its own vent pipe, and the gas water heater is left alone in a flue that was sized for two appliances. The same guide also notes that condensation can occur when a furnace and water heater share a flue and the water heater runs while the furnace is off.

The chimney form New Jersey attaches to the job

New Jersey's Department of Community Affairs publishes Form F370, a chimney verification for the replacement of fuel-fired equipment. The form asks for confirmation that the chimney or vent:

• is in good repair and clear of obstruction;
• is substantially free of residue from previous fuel use;
• is appropriately lined and sized for the appliances being installed.

It also asks for liner details if a new liner is installed and for the connector pipe's size, rise and length. For minor and emergency work, the form must accompany the permit application. For full permits, it must be presented to the code official before the final inspection.

Your heating contractor handles the permit. A chimney inspection done before the new equipment is chosen gives everyone the facts the form asks about, with photos, and leaves time to install a liner or schedule flue cleaning before the final inspection instead of after a failed one.

Fair Lawn's designated historic sites

Fair Lawn's land development ordinance designates the Radburn Historic District and three individual properties: the Naugle-Vanderbeck House, the Cadmus House and the Jacob Vanderbeck House. Under § 125-47.02, applications for permits pertaining to historic sites or property in historic districts must be referred to the Historic Preservation Commission for a written report.

The ordinance also sets property-specific standards. For the Jacob Vanderbeck House, it states that all chimneys must be brick masonry. If your home is in the Radburn district, mention it when you request work on the chimney or roof so the review can be planned in.

Local questions

Sources

1. U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates (tables B25034, B25040, B25024), via Census Reporter
2. Borough of Fair Lawn Code, Chapter 125, Land Development (historic sites § 125-46.1, 125-47.01, 125-47.02), eCode360
3. NJ Department of Community Affairs, Form F370: Chimney Verification for Replacement of Fuel-Fired Equipment (PDF)
4. DuraVent: Relining Chimneys for Gas Appliances (technical guide, PDF)