Top 7 HVAC companies in Mercer, New Jersey

Mercer County sits in IECC zone 4A with 4,800 heating degree days and 1,200 cooling degree days. The load profile is heating-leaning yet humid summers push central air saturation high. Public listings show seven contractors with enough reviews to generate adjusted scores. These scores pull raw star ratings toward the national mean of 4.764 so that volume of feedback influences final rank. The shortlist below presents each firm exactly as listed, including its raw rating, adjusted score, address and phone.

The shortlist

This ranking uses a Bayesian-adjusted rating that pulls every raw score toward 4.764. A public website, HVAC-specialist category and published 24/7 availability supply small tie-breakers. The list is built only from public listing data and does not review work performed.

FIRST FAMILY HEATING & AIR SERVICES

FIRST FAMILY HEATING & AIR SERVICES operates from Lawrenceville, NJ 08648 in Lawrence Township as a general contractor without a published website or 24/7 listing. Its 32 reviews produced a raw 5.0 that the adjustment pulled down to 4.886 because the modest review count gives the national mean more influence. The firm lists the phone (609) 450-6220. These numbers cannot reveal whether the contractor maintains the insurance required by N.J.S.A. 45:16A.

W&T HVAC CONSTRUCTION LLC | General Contractors Near Me | Air Conditioning Contractor | HVAC Companies | Trenton, NJ

W&T HVAC CONSTRUCTION LLC works from 585 Parkway Ave, Ewing Township, NJ 08618 and lists a public website. Thirty reviews at a raw 4.9 adjusted to 4.872, a modest downward shift reflecting the still-limited sample size relative to the national mean. The phone number is (609) 372-6245. The listing category of general contractor supplies no signal that the firm restricts work to HVAC systems.

SIX HVAC, LLC

SIX HVAC, LLC is based at 300 Carnegie Center Dr, Princeton, NJ 08540. Its 52 reviews at a raw 4.8 moved to 4.847 after adjustment, the smallest downward correction among the higher-rated firms because the larger review count anchors the score closer to the raw value. Both a website and 24/7 availability appear in the listing. The contact number is (609) 882-6664. The data do not show whether the firm actually answers calls at all hours.

Frigid Air LLC

Frigid Air LLC lists 1985 E State St, Hamilton Township, NJ 08619. Thirty-seven reviews produced a raw 4.8 that adjusted to 4.844. The firm publishes both a website and 24/7 availability. Reach the company at (609) 586-1266. Review volume remains too low to eliminate the pull of the national mean entirely.

AC & Heating Experts Princeton

AC & Heating Experts Princeton operates from 141 Harris Rd, Princeton, NJ 08540 with only four reviews. The raw 5.0 adjusted sharply to 4.812 because the tiny sample size gives the national mean of 4.764 substantial weight. The listing shows 24/7 availability but no website. The phone is (609) 293-4475. Four reviews leave most performance questions unanswered.

Climate Mechanical Services

Climate Mechanical Services is located at 1800 E State St Ext Suite 151, Hamilton Township, NJ 08610. Ten reviews at a raw 4.7 adjusted upward to 4.788 as the score moved toward the higher national mean. A website is listed but 24/7 availability is not. The phone number is (609) 585-3130. The modest review count still allows noticeable movement from the raw rating.

Heating & Cooling Inc.

Heating & Cooling Inc. lists 1108 S Broad St, Trenton, NJ 08611. Its 35 reviews produced a raw 4.1 that the adjustment raised to 4.426 because the score sits below the national mean. The firm shows 24/7 availability and no website. No phone number appears in the public listing. The larger review count still left the adjusted score well below the top of the shortlist.

How to choose

The Bayesian adjustment described above prevents small-sample 5.0 ratings from outranking higher-volume scores. Homeowners should also confirm that any contractor holds both the Master HVACR Contractor license and the separate Home Improvement Contractor registration required by New Jersey.

Cost

Installed-cost data for Mercer County show a typical full-system price of $11,800 with a reported range of $10,600 to $13,000. A separate 2025 invoiced average reached $19,579 and the upper quartile hit $28,932. Labor is listed at $150 per hour and mechanical permits range from $175 to $600. The two cost sources diverge by several thousand dollars; both figures are retained because the spread itself is the available information. No single average should be treated as a fixed quote.

Climate

Mercer County falls in IECC zone 4A with a moist regime. Winter design temperature is 13 °F and summer design reaches 92 °F. Heating degree days total 4,800 while cooling degree days total 1,200, producing a heating-leaning mixed load. Humid summers coincide with high central-air saturation. Natural-gas infrastructure is dense, yet heat-pump suitability is rated very good. Equipment must handle both heating peaks and humidity control without oversizing that would shorten run times in the shoulder seasons.

Licensing and permits

HVACR contractor licensure is administered at the state level by the New Jersey State Board of Examiners of Heating, Ventilating, Air Conditioning and Refrigeration Contractors within the Division of Consumer Affairs. The board issues a Master HVACR Contractor license; a limited license is also available for narrower scopes. Minimum $500,000 general liability insurance from a New Jersey-licensed insurer and workers' compensation coverage are required under N.J.S.A. 45:16A. Since 2014 a licensed contractor may work anywhere in the state, yet mechanical permits for furnace or AC replacements are issued by each local municipal construction office. Homeowners must verify both the state license and the local permit requirement directly.

Incentives

New Jersey’s M-RISE / Community Partners HEAR program under the Board of Public Utilities is conditionally approved and plans an $8,000 heat-pump rebate that can stack with NJCEP incentives. Utility rebates through PSE&G, JCP&L and others range from $1,000 to $4,000. No state tax credit exists. Federal 25C and 25D credits expired at the end of 2025, leaving only the commercial 48E ITC at 30 percent for systems that meet timing rules. NJCEP participation is required for most rebates, so homeowners should confirm that any contractor is enrolled in the program network before proceeding.