Before you act on a number here: which utility, zone and programs reach a building depends on its address, not its ZIP code. Confirm it for yours.
Who this is for: a facilities director or chief engineer in New York or New Jersey holding a quote to replace a chiller, a rooftop unit or a cooling tower, or watching one fail. The decision: repair it, re-tune it, retro-commission the system around it, modernize its controls, or replace part or all of it. The money and the rules differ by state; where they do, each section says which one it describes.
The quote is the last piece of evidence, not the first
Replacement quotes tend to arrive at the worst moment: a compressor fails in July, a rooftop unit trips on every hot afternoon, a tower basin is scaled past saving. The quote names a unit, a tonnage and a price, and it rests on two assumptions: that the old equipment is the problem, and that the new equipment should match the old nameplate. Both are worth testing before the purchase order goes out. A unit can fail because of the way it is controlled. A plant can be sized for a load the building no longer has. And in both states, the order in which the decision gets made settles which incentives, code steps and compliance duties come with it.
What equipment age does and does not tell you
The age argument usually rests on a service-life chart, and two things about that chart matter. ASHRAE’s median service life is the highest age at which at least half of the surveyed units were still in service while the sample stayed large enough to count; it describes a population, not the day a particular unit stops being worth keeping. Centrifugal chillers in ASHRAE’s database do not fall to 50% survival until about 31 years, yet the median is reported only as “more than 25” because the sample thins out at the older ages. And much of the life-expectancy table still in circulation comes from a 1978 survey, while the current database reports many categories as having too little data to state a median at all. ASHRAE’s own research found that building age has a statistically significant but minor effect on maintenance cost. Age is a reason to look closely. By itself it is not the evidence.
Retro-commissioning comes before replacement
The ENERGY STAR Building Upgrade Manual sets out a staged approach: retro-commission the existing systems first, reduce the loads second, and only then size and replace equipment. The order exists because the first two stages change the answer to the third. A chiller that short-cycles may be serving a building whose schedules, set points and outdoor-air rates have drifted for years; correct those and the load it must meet falls. A rooftop unit that cannot hold temperature may have a stuck economizer damper or a sensor reading three degrees off. A cooling tower that seems undersized may be holding a wide approach because of fouled fill, and most water-cooled chillers are designed for entering condenser water at or below 85°F; above that, the same cooling costs more compressor power. None of this is visible on a nameplate. All of it shows up in the trend data a building automation system keeps, if someone reads it.
This has a name: retro-commissioning, the systematic check of existing systems against what the building needs now, with the deficiencies corrected. In New York City, buildings over 50,000 square feet must do it every ten years, and the deficiencies it finds have to be fixed (see Local Law 87 retro-commissioning).
Six options, not two
Framing the choice as repair or replace hides most of the options. Each one below fixes a different problem, and each has its own evidence.
| Option | What it fixes | Evidence that points to it |
|---|---|---|
| Repair | A failed component on equipment that is otherwise sound | One fault, a repair history that is not accelerating, efficiency at actual load close to rated |
| Re-tune the controls | Schedules, set points, resets and overrides that have drifted | Runtime outside occupied hours, set points nobody can explain, heating and cooling running at once in the trends |
| Retro-commission the system | Sensors, sequences, balancing and economizers across the system serving the unit | Sensors that disagree with spot readings, units working against each other, comfort complaints that move around the building |
| Modernize the controls | A control system that cannot do what the building needs: no trends, a closed protocol, no way to change a sequence | Points that cannot be read or written, sequences that only the original vendor can edit |
| Replace part of the plant | One unit at the end of its life in a plant that is otherwise sound, or a plant sized for a load that no longer exists | Load data showing the plant rarely runs near capacity; one unit’s repair costs climbing while the others hold |
| Replace all of it | Equipment that cannot be made to perform, a refrigerant or fuel decision with a date on it, or a building whose use has changed | Evidence from the rows above, plus a code, refrigerant or emissions date that changes the cost of waiting |
The evidence a responsible review collects
The review is built from records the building already has or can produce quickly: a season of trend data for the unit and the system around it (supply and return temperatures, run hours, staging, condenser-water temperature, and kW where it is metered); the load the unit serves now, compared with its nameplate; at least two years of repair and service history; the control sequences as programmed, which are often not the sequences as designed; and the building’s obligations at its address. From those it separates symptoms from causes, compares the options on energy, cost, incentive and compliance, and names what still needs a test or a meter. After any change, the same trends show whether it worked.
In New York, the money is decided before the unit fails
This section applies to Con Edison territory, under the utility’s 2026 program manual.
Con Edison’s commercial program, for accounts averaging more than 100 kW, pays for replacing equipment that still works. Its 2026 manual says incentives do not cover maintenance, repairs, or replacement of non-functional equipment, and do not pay to correct an existing unit’s sizing. Downsizing qualifies only through two custom paths. Early Replacement is for equipment that is fully functioning and has at least a quarter of its expected useful life left. Extended Life is for equipment that is fully functioning, has run at least 25% past its expected useful life (or, for a chiller whose age cannot be shown, uses at least 35% more energy than the new model would), and has two years of documented significant repairs. A chiller that has already failed fits neither path. The practical consequence: an owner who decides while the unit still runs keeps the incentive option, and an owner who waits for the failure gives it up.
The process rules point the same way. Con Edison issues a preliminary offer, inspects the site and sends a Notice to Proceed before any equipment may be bought or installed; anything purchased earlier is ineligible. Incentives are capped at 50% of project cost and $1,000,000 per account per year, and are paid by check after completion and inspection, about six weeks after the paperwork is complete. Startup testing and commissioning count as eligible costs; design, permits and project management do not. The 2026 manual expires December 31, 2026, and the 2027 terms had not been published as of October 27, 2026. Every figure here is subject to program funding.
In New Jersey, the channel decides how the money arrives
This section applies to PSE&G, JCP&L and Atlantic City Electric territory.
New Jersey’s utility programs pay through several channels, and they behave differently. Direct Install, run by each utility for facilities averaging up to 300 kW of demand or using between 5,001 and 40,000 therms a year, covers a large share of eligible costs (up to 80% at Atlantic City Electric, including labor) with the incentive applied as the work is done; Atlantic City Electric’s version has to go through one of its trade allies. Participating distributors apply a discount at the point of sale for listed equipment. The prescriptive and custom application paths pay after installation, review and inspection, and custom projects need approval before purchase. PSE&G and JCP&L both offer 0% repayment of the remaining cost through the utility bill: 60 months at PSE&G, and $2,500 to $250,000 over up to five years at JCP&L. The programs run under an authorization through June 30, 2027 and are first come, subject to funding.
The rules that ride along with a replacement
A replacement can trigger obligations the quote does not mention, and they differ by state.
- Commissioning (New York City). Under the City’s energy code, an alteration that installs 480,000 Btu/h or more of cooling (about 40 tons) or 600,000 Btu/h of combined heating and hot water has to be commissioned, with a preliminary commissioning report filed before the mechanical sign-off. New Jersey’s commercial energy code follows ASHRAE Standard 90.1-2019, and its commissioning requirements should be read from that standard rather than carried over from New York’s.
- Refrigerant (New York State and New Jersey differ). In New York, the sell-through window for existing R-410A packaged air conditioning and heat pumps closes January 1, 2027; servicing existing systems stays allowed. In New Jersey the same equipment remains legal to install. See Replacing Heating or Cooling in New York or New Jersey.
- Cooling towers. In New York City, replacing or removing a tower changes its registration, testing and certification duties, and the City’s plumbing code bars potable water for once-through cooling. In New Jersey, a building with a tower must have a water management program implemented by December 12, 2026, and the program changes when the device does. See Before You Replace or Remove a Cooling Tower.
- Emissions (New York City). For buildings covered by Local Law 97, a heating or cooling replacement is also a decision about the 2030 limit, and qualifying equipment installed and operating before January 1, 2027 earns double the electrification credit of equipment installed after. See Your Building May Be Fine Today and Still Be Headed for a 2030 Penalty.
What the review produces
A dated comparison of the options that fit the building, from repair through full replacement, showing energy use at the building’s actual load, the incentive path open at its address on the date of the decision, the code and compliance steps each option triggers, and the facts that still need a test, a meter or a manufacturer’s answer. It recommends the next responsible step, which is often not the replacement the quote assumed and sometimes is. It is an engineering assessment, not an incentive guarantee: the utility decides eligibility and amounts.
Sources and dates
- U.S. EPA, ENERGY STAR Building Upgrade Manual (staged approach to upgrades).
- ASHRAE equipment service-life methodology and database; ASHRAE research on building age and maintenance cost.
- Con Edison Commercial and Industrial Energy Efficiency and Electrification Program Manual, Program Year 2026, Version 1.1 (issued July 1, 2026), sections 1.1 to 1.5, 2.6.3, 2.6.4, 3.0 and 9.0.
- Sustainable Jersey, Direct Install Guide for Municipal Governments and School Districts, 2026 Version 1.3; Atlantic City Electric Direct Install program material (©2025); PSE&G and JCP&L commercial program and on-bill repayment material.
- NYC Department of Buildings, NYC Energy Conservation Code FAQ and registrant project requirements; New Jersey energy subcode, N.J.A.C. 5:23-3.18 (ASHRAE 90.1-2019, adopted September 6, 2022).
- 6 NYCRR Part 494; P.L. 2024, c.66; NYC Plumbing Code §428.1.1; 1 RCNY §103-14 (Local Law 97 beneficial-electrification credit).
- Last reviewed October 27, 2026. The New York program section changes when Con Edison publishes its 2027 manual; the refrigerant and Local Law 97 lines change on January 1, 2027.