Should You Repair or Replace the Commercial HVAC in Your Business?

 Edited by Eduardo Ortega, Marketing Manager · November 2026 

It’s the first hot afternoon of the season, the store is full, and the rooftop unit quits. The technician gives you two numbers: one to fix it today, and one to replace it. Neither number is small, and you need the space comfortable for customers and employees by tomorrow.

We’ve been working on HVAC systems across the Columbia River Gorge since 2009 and in the Gresham and Portland area since 2022, including light commercial HVAC for local businesses. We sell both repairs and replacements, so we get paid either way. That’s why we’d rather walk you through how to decide than tell you what to buy. If you already know your system needs attention, our commercial team can look at it and give you an honest recommendation and a quote.

How Long Does Commercial HVAC Equipment Last?

Most commercial HVAC equipment lasts about 15 to 20 years, so age is the first thing to check.

Many businesses use a rooftop unit, often called an RTU, which is the box on the roof that heats, cools and moves air through the building. Others use split systems, heat pumps, furnaces or ductless units, and the same repair-or-replace thinking applies to all of them. ASHRAE, the engineering group that sets HVAC standards, puts the median life of a rooftop air conditioner or commercial heat pump at 15 years and a gas furnace at 18 years, and a U.S. Department of Energy paper gives rooftop units a typical range of 15 to 20 years.

Brand and care both change how long a unit lasts. A Trane unit is kind of like the Toyota of HVAC: it’s built to get a lot more mileage than a cheaper system. And just like a car, a unit that gets regular maintenance can run well past 15 years, while one that’s been neglected on a dusty, windy roof can fail early.

When Does Repairing Make Sense?

Repair is usually the right call when the unit is under 5 years old, the problem is a single part, and the system has a good track record.

A failed capacitor, which helps the motors start, a fan motor, or a contactor, the switch that turns the unit on and off, is a normal repair on a 4-year-old unit, not a sign the system is done. Between 5 and 15 years, the answer depends on the model, the repair and the unit’s history. If it’s the first big repair, your energy bills have been steady, and you’re planning to move or remodel in the next few years anyway, repairing keeps cash in the business and avoids the planning a replacement takes.

The refrigerant change isn’t a reason to replace on its own, either. Existing R-410A systems can still be repaired and recharged, even as new equipment moves to refrigerants like R-454B, which we explain in What Is 454B Refrigerant?

When Is Replacement the Better Call?

Replacement starts to win when an older unit keeps breaking, costs more to run, or can’t keep the space comfortable.

As equipment ages, it needs repairs more often, and those repairs add up. At some point, the cost of keeping an old unit running outweighs the cost of a new one, and the new unit is typically more efficient, so it costs less to run too. Watch for a unit that’s 15 years or older and needs a major part, like the compressor or the heat exchanger, the part that moves heat from the burners into the air. Other signs are repair calls every season, rising energy bills when your hours haven’t changed, or hot and cold spots your employees and customers complain about. Each breakdown also costs you in lost sales and last-minute scheduling.

How Does A&E Help You Decide?

There isn’t one age or dollar amount that decides it for every business, so our sales team looks at your specific unit and site, then quotes your options.

Charlie Burwell, A&E’s Commercial Sales Manager, says the answer really depends on the model and year of the equipment. Our sales team weighs the unit’s age, its repair history and the conditions at your building to work out whether more repairs or a replacement makes more sense. If replacement is the better fit, you choose the equipment and options you want, and we quote it.

That’s also why you won’t find a price list for commercial work here. The size of the unit, how easy it is to reach, the permits the job needs and the equipment you choose all change the price, so every job is quoted by us.

How Do Taxes, Rebates and Financing Change the Math?

For many businesses, the real cost of a new system is lower than the quote, because tax rules and Oregon incentives can take a share off.

HVAC systems on nonresidential buildings can qualify for the federal Section 179 deduction, which lets a business deduct the cost in the year the equipment goes into service instead of spreading it over many years. For 2026, the IRS sets the Section 179 limit at $2,560,000. The 2025 federal tax law also made 100 percent bonus depreciation, another way to write off the full cost in year one, permanent for property bought after January 19, 2025. We’re HVAC contractors, not tax advisors, so talk to your CPA before you buy.

In Oregon, Energy Trust of Oregon offers incentives to business customers of PGE, Pacific Power, NW Natural, Cascade Natural Gas and Avista, including $200 to $350 per ton for commercial heat pumps under 5.4 tons and $200 to $400 per commercial smart thermostat. Applications are due within 90 days of installation. If paying all at once is the problem, A&E also offers financing for homes and businesses on approved credit.

What If Your Business Leases Space in a Shared Building?

In some commercial buildings, each business is responsible for its own HVAC unit, so the repair-or-replace decision is yours.

Charlie has worked in a local building like this, where every business pays for its own repairs and replacements. When one business’s unit goes out, that owner decides whether to fix it or replace it and covers the cost. If your building works this way, we can work with you directly on your unit. And if other businesses in your building have older units, it can make sense for each of them to plan ahead too, instead of waiting for a breakdown.

What Happens During a Commercial HVAC Replacement?

For most businesses in town, a replacement is straightforward: the old unit comes out and the new one goes in.

It starts with a quote and options. Once you confirm what you want, we pull the permits the job needs. Depending on where the building is and how tall it is, some jobs need traffic control or a crane, like a rooftop unit on a tall building where the only access is from the street. Then we remove the old unit and set the new one. If the new unit is the same size and the ductwork is in good shape, that part is simple, and most businesses in town don’t need the crane or traffic work at all.

What Does the Decision Look Like for a Real Business? A Sample

Here’s a hypothetical example of how the decision can play out.

A retail shop in Hood River has a 16-year-old rooftop unit that’s needed several repairs over the last few years. In July, the compressor, one of the most expensive parts, fails. The unit is past its median life, and a compressor repair would put more money into equipment that will likely need the next repair soon. In a case like this, replacement usually makes more sense: the shop gets a more efficient unit, the owner can talk to their CPA about deducting it this tax year, and because the new unit is the same size and the ductwork is good, the job is a straight swap. If that same unit were 4 years old with a failed fan motor, repair would almost always be the better call.

What Should Gorge and Portland-Area Businesses Consider?

Our climate is hard on HVAC equipment, so timing matters here. In the Gorge, wind pushes dust into outdoor and rooftop coils and wildfire smoke clogs filters in late summer, and The Dalles’ summer heat is when a weak compressor usually gives out. In Gresham and Troutdale, the east wind and freezing rain test heating systems on the coldest days. Replacing a unit in spring or fall, before it fails, is easier to schedule than a rush job in July. Businesses on Hood River Electric Cooperative or Northern Wasco County PUD should check with their utility, since Energy Trust electric incentives are for PGE and Pacific Power customers. See our Hood River HVAC services, The Dalles HVAC services or Gresham HVAC services for local details.

So, Should You Repair or Replace Your Commercial HVAC System?

Repair a unit under 5 years old with one failed part; plan to replace an older unit that keeps breaking down. Look at what you’ll spend over the next few years, including energy and downtime, not only this week’s bill, and check Section 179 and Energy Trust incentives before you buy. We’ve been helping Gorge businesses with their heating and cooling since 2009, and our sales team will look at your unit and quote your options so you can decide.

If you’re planning a replacement, your next step is to read Which Commercial Heating System Makes the Most Sense for Dalles, OR Businesses?

Frequently Asked Questions About Repairing or Replacing Commercial HVAC

How long does commercial HVAC equipment last?

Most commercial HVAC equipment lasts about 15 to 20 years. ASHRAE puts the median life of a rooftop air conditioner or commercial heat pump at 15 years and a gas furnace at 18. Regular maintenance helps a unit reach the longer end of that range, while dust, smoke and skipped maintenance can shorten it.

Is it worth repairing a 15-year-old commercial HVAC system?

It depends on the model, the repair and the unit’s history. A small part, like a capacitor or fan motor, is often worth fixing. A major repair, like a compressor, on a unit that has needed several repairs is usually better spent on a replacement.

Can I still repair an R-410A commercial HVAC unit?

Yes. Existing R-410A systems can still be repaired and recharged. New equipment is moving to refrigerants like R-454B, but you don’t have to replace a working R-410A unit because of the refrigerant change.

Does replacing a commercial rooftop unit need a crane?

Not always. Many businesses get a simple swap: the old unit comes out and a new one of the same size goes in. Taller buildings, or sites where the only access is from the street, may need a crane or traffic control, which is planned and included in the quote.

How much does it cost to replace a commercial HVAC system?

It depends on the size of the unit, how easy it is to reach, the permits the job needs and the equipment you choose, so A&E quotes each job. Tax rules like Section 179, Energy Trust incentives in Oregon and financing can lower what you pay.