Monroe Township (Middlesex County), NJ: HVAC & Mechanical Noise (2026)

Section 69-7B(13) of the Monroe Township Code treats HVAC noise as its own category. It bars operating air-conditioning or air-handling devices, including heat pumps, in a way that produces a sound level greater than 55 dBA at a real property line of a residential property. The limit is a fixed number and is read at the line, not at the window, so a condenser placed close to a boundary is judged where the neighbor's land begins. Section 69-3 defines the real property line as the imaginary line, including its planar extension, separating one parcel from another, and defines dBA as the unit of A-weighted sound level.

A carve-out is printed in the same clause. The limit does not apply when the operation produces less than a four-dBA increase over the sound level that exists in the absence of such sound, which protects a unit in a place already noisy from traffic, such as along Route 33 or the Turnpike corridor.

This clause is also an exception to another one. Section 69-6B(4) exempts noise from air-conditioning and air-handling devices from the ordinary Table I limits, except as provided in § 69-7B(13), so the 55 dBA rule is the standard that applies, not the table. The Noise Control Officer measures under N.J.A.C. 7:29B procedures, as § 69-4D requires, and the Health Department administers Article I. The officer can issue a notice of violation under Township Code procedures or an abatement order giving a reasonable time to fix the source, such as relocating or screening a compressor. Special variances are possible under § 69-8B if consistent with N.J.A.C. 7:29.