After-Hours HVAC Charges: Budget for the Hours Your Business Opens

An office with lower base rent can cost more to operate if your business needs heating, ventilation or cooling after the building's included service hours. The extra bill may depend on each activation, a minimum charge, the number of zones or floors served, administration fees and the building's holiday calendar—not simply the number of hours your door is open.

Before you sign, put your intended operating schedule beside the lease's HVAC schedule and price the gaps. A clinic with evening appointments, a training business running Saturdays or a team working early mornings can have a very different bill from the previous tenant, even in the same suite.

Access hours are not HVAC hours

Being able to enter with a security card does not establish that normal heating and cooling will be provided at that time. Ask for both the executed lease's service commitments and the current building operating manual. If they appear inconsistent, have the discrepancy resolved in writing before relying on either version.

The Exchange in Vancouver provides a concrete historical example. Its December 2019 tenant manual separately addresses building access, service hours and after-hours HVAC requests. The HVAC section specifies weekday service excluding holidays, an online request cutoff, and an hourly charge per floor plus administration fees and applicable taxes. That demonstrates the items a tenant must check; it is not a quote for service there today. The Exchange tenant manual, pages 29–30.

Clarify what “service” includes for your use. A room that becomes cool enough after the system starts may still need a warm-up or cool-down period before the first appointment. Ask the building operator what scheduling is appropriate for the actual premises, expected occupancy and equipment. Do not assume that booking the exact customer-facing hours will achieve the conditions your operation needs.

Build a calendar without counting a holiday twice

Start with dates, not “about four weeks.” Record each day your business plans to operate and the service interval required. Mark the building's excluded holidays before grouping ordinary weekdays. A weekday holiday belongs in the holiday group, not both groups. Payroll holiday definitions and the building's service calendar should not be assumed identical.

Here is a fictional 30-day month for a one-zone business. All schedules, rates and fees below are assumptions in Canadian dollars, not market rates:

• There are 22 Monday-to-Friday dates, including one building-observed weekday holiday, plus four Saturdays and four Sundays.
• Included HVAC is 8 a.m.–6 p.m. on the 21 ordinary weekdays. No HVAC is included on weekends or the holiday.
• The business needs HVAC until 7 p.m. on ordinary weekdays, 9 a.m.–1 p.m. on Saturdays, and 10 a.m.–2 p.m. on the holiday. It closes Sundays.
• Extra service is $55 per hour for the one zone, with a two-hour minimum for every chargeable daily activation. A 10% administration fee applies to the service charge. Taxes and all other occupancy costs are excluded from this illustration.

The calendar reconciles: 21 ordinary weekdays + 1 holiday + 4 Saturdays + 4 Sundays = 30 dates. Now calculate the service charges:

The service charge is 62 × $55 = $3,410. Administration adds $341, giving $3,751 before taxes. Without the two-hour minimum, the same 41 actual extra hours would cost $2,480.50 including administration. The minimum adds $1,270.50 in this month.

Notice that a closed Sunday does not generate a two-hour charge. A minimum applies to a chargeable activation in this hypothetical agreement; it is not a fee for every day on the calendar. Likewise, applying the minimum once to the monthly total would miss the cost of the 21 short evening activations.

The minimum may apply differently to an evening extension

Do not assume the preceding example matches your lease. One publicly filed US office lease applies a two-hour minimum when after-hours service does not begin immediately after normal business hours. It also specifies a per-zone charge and advance-request requirements. That distinction makes a continuous evening extension different from a separate restart in that contract. Filed lease, section 7(b).

If our hypothetical lease instead allowed each 6–7 p.m. extension to be billed for only one hour, with everything else unchanged, the 21 ordinary weekdays would contribute 21 billable hours rather than 42. The total would be 41 hours and $2,480.50 before taxes including administration. One sentence about when a minimum applies changes the budget more than a small difference in the headline hourly rate.

That US clause is an example of contract drafting, not a BC rule. Ask your landlord: Is the minimum per request, per day, per zone or per restart? Are separate morning and evening requests combined? What happens if another tenant already has the system running? Does cancelling before the cutoff avoid the charge? Record the actual answers rather than borrowing assumptions from another building.

Price the area that must run, not just your suite

“Per zone” and “per floor” are not interchangeable units. A small business may use one room while the control system must serve a larger area. Ask for a simple description of the equipment and billing unit serving your premises, and have the operator confirm whether zones can be scheduled independently.

If the example's $55 rate applied separately to two zones that must both operate, the service and percentage administration charges would double to $7,502 before taxes. But do not multiply by two merely because the suite contains two thermostats. Control points are not proof of two independently billable zones.

Shared requests also need an agreed allocation. Two tenants choosing the same Saturday hours might be able to coordinate a request, but the existence of a neighbour does not promise half-price service. Find out whether the landlord pools overlapping bookings, bills each tenant separately or follows another contractual method. Your budget should use the amount you can actually expect to be charged.

Turn the estimate into a booking and bill-checking routine

For each proposed activation, write down the date, start and end time, service zone, minimum, billing increment and any fixed charge. Deduct the interval already included in your lease. Apply the minimum and rounding rule to the remaining chargeable interval as the contract requires, then multiply by the rate and add the applicable fees. Only after that should you total the month.

Keep the confirmation or request number with the entry. When the invoice arrives, match it to the requested interval and any cancellation. If actual system logs are available under the building's process or your agreement, use them to investigate differences. Do not assume that requested time, equipment runtime and the contractual billable period are always identical.

Appoint someone to manage recurring bookings and holiday exceptions. An evening event added at the last minute may miss the building's request cutoff even when you have money in the budget. Include customer access, elevator availability and security in the same operational conversation; paying for cooling does not unlock a secured entrance.

For ongoing planning, test a quiet month, the normal schedule and a peak month with extra weekend events. BDC's budgeting guidance emphasizes forecasting all occupancy costs over the lease term and considering how your use differs from the previous tenant's. BDC: commercial-space budgeting.

This service-hour budget is separate from who pays to repair or replace the equipment. Keep both in your premises decision; the commercial HVAC responsibility guide covers that different exposure.

Before comparing two offers, ask each landlord to price the same actual operating calendar. That gives you a useful monthly comparison—and reveals whether the building can support the hours your customers need.

By Justin Qiao, Personal Real Estate Corporation, Justin Qiao Group | RE/MAX Crest Realty. General commercial-leasing information; all worked-example amounts are hypothetical. Historical manuals and contract samples illustrate questions, not current rates or legal advice. Sources checked September 8, 2026.