Is the Landlord or the Tenant Responsible for HVAC in a Commercial Lease?

When a rooftop unit fails in January, the first question in a leased building is often not how to fix it but who pays. This article explains the arrangements commercial leases commonly use and the clauses worth reading, so owners, tenants and property managers can ask the right questions. This is general information, not legal advice. We are an HVAC contractor, not a law firm. Your lease and your attorney decide who is responsible. What we can do is keep the equipment documented for both parties through commercial preventive maintenance.

Who is responsible for HVAC in a commercial lease?

Responsibility for HVAC in a commercial lease is whatever the lease says it is, and leases vary widely. There is no single default a tenant or landlord can assume. Two neighboring storefronts under one roof can have leases that divide the same rooftop units in completely different ways, depending on what was negotiated when each was signed.

That is why this article describes common patterns only, in general terms. It cannot tell you what your own lease means. Read the lease, and if the wording is unclear or the stakes are high, have your attorney read it before you approve or refuse a repair.

What are the common lease arrangements for HVAC?

The common lease arrangements for HVAC fall into three broad patterns, though the names are used loosely and every lease defines its own terms. Treat these as descriptions of what people often mean, not as definitions that apply to your building.

Common commercial lease patterns for HVAC, in general terms

Arrangement	What it often means for HVAC	What to confirm in the lease
Gross or full-service lease	The landlord often maintains, repairs and replaces the equipment, with the cost built into rent	Whether any tenant-caused damage or extra equipment is carved out
Net or triple-net lease	The tenant often maintains the equipment serving its space, and sometimes repairs or replaces it too	Whether replacement is included or treated as a capital item
Split responsibility	The tenant maintains and handles routine repairs; the landlord replaces the unit when it reaches the end	Where the line between a repair and a replacement is drawn
Tenant-installed equipment	Equipment a tenant added, such as a kitchen make-up air unit, often stays the tenant's responsibility	Who owns it at lease end and whether it must be removed

The split arrangement is common in practice, and it is also where most disagreements start. A new compressor on an older unit can look like a repair to one party and a replacement to the other.

Which lease clauses decide who pays for HVAC?

The lease clauses that decide who pays for HVAC are usually the ones covering maintenance, repair, replacement and capital improvements, plus any requirement for a service contract. They may be spread across several sections rather than in one HVAC paragraph. Look for:

• Maintenance: who arranges routine service, how often, and whether a licensed contractor is required.
• Repair: who pays when a part fails, and whether there is a cap before the other party takes over.
• Replacement: who pays when a unit reaches the end of its life, and who decides that it has.
• Capital improvements: whether a new unit is treated as a capital item, and how its cost is shared or passed through.
• Required service contract: whether the tenant must keep a maintenance agreement in force and provide copies of reports.
• Condition at move-in and move-out: what state the equipment must be in when the lease starts and ends.

If any of these are missing or vague, that gap is a question for your attorney, not something to settle on the roof during a no-heat call.

Why does documented HVAC maintenance matter to landlords and tenants?

Documented HVAC maintenance matters because disputes over a failed rooftop unit usually come down to whether it was maintained. If a lease requires the tenant to keep the equipment serviced and a heat exchanger cracks, the first thing anyone asks for is the service history. If the landlord is responsible for replacement, the tenant wants proof that the failure was age, not neglect.

In this climate, neglect shows up fast. A heating season that commonly runs from late September into May, freeze-thaw on cabinets and a stuck economizer all wear equipment hard. Our rooftop unit service page explains what that wear looks like. A written report per visit, with the unit tag, serial number, readings and work done, is the record both parties can point to. Equipment warranties can also turn on maintenance records, so the same paperwork serves more than one purpose.

Rural buildings are no exception. A tenant running a shop in Sawyer or Atkinson on a propane furnace needs the same paper trail as a downtown retail bay on a rooftop unit.

What can an HVAC contractor provide to both parties?

An HVAC contractor can provide the equipment facts that both parties need, without taking sides on who pays. We report what we find and what we did, and send the report to whoever the parties tell us to include.

1. Equipment inventory: each unit's location, tag, model, serial number, refrigerant type, and filter and belt sizes.
2. Written readings: the measurements taken on each visit, recorded the same way every time so changes are visible.
3. Service records: what was done, which parts were used, and what we recommend, separated into now, this year and monitor.
4. Condition report before a lease signing or renewal: an assessment of each unit's condition so both sides know what they are taking on.
5. Repair or replacement assessment: our technical opinion of whether a unit can be repaired sensibly, which the parties can then apply to their lease.

A condition report is especially useful before a new tenant takes space that has sat empty, such as a vacant storefront in Cloverland, where nobody may know how long the equipment has gone without service. For a broader look at how commercial equipment and service differ from a house, see commercial vs residential HVAC.

What should you do when the HVAC fails in a leased building?

When the HVAC fails in a leased building, protect the building first and sort out responsibility second. Frozen sprinkler lines and burst pipes cost everyone more than the repair. Notify the other party as the lease requires, keep a record of when you reported it, and get a technician to diagnose the failure so both parties are working from the same facts.

If the building has no heat or a gas smell, do not wait on the lease. For a gas smell, leave the building and call the gas utility or 911 from outside. For a no-heat call, book commercial HVAC repair and let the parties decide the invoice afterward.

When should you call us, and when should you call your attorney?

Call an HVAC contractor for anything about the equipment: condition, readings, repairs, replacement options and service records. Call your attorney for anything about the lease: what a clause means, who pays, and what to do if the other party disagrees. Tenants and landlords can safely change filters and check thermostat settings; everything on the roof, in the gas train or in the refrigerant circuit belongs with a technician. A commercial preventive maintenance agreement gives both sides a steady record, which is the most useful thing you can bring to any lease conversation.