Nine Trucks, 430 Deaths, and the Whiteboard in Between

Del Brashear is not a real person. She is a composite character, an imagined HVAC dispatcher in Phoenix, constructed from documented industry conditions, labor data, regulatory filings, and county mortality reports. Her job is real. Her queue is real. Her triage decisions are modeled on documented dispatch protocols. The room temperature she's worried about is someone's actual room temperature right now.

We spoke, hypothetically, on a Wednesday afternoon in July, which Del said was the worst possible time to talk because "Wednesday is when Monday's callbacks come due." She agreed anyway, on the condition that we not call her a hero. "Heroes get days off," she said.

You came up in this industry. What does an HVAC dispatcher actually do that people don't understand?

Del: People think I answer phones. I route trucks. Those sound like the same thing but they live in completely different parts of your brain. Right now I have nine technicians. Two are on warranty callbacks from yesterday. One's been stuck at a commercial job since 6 a.m. that was supposed to take three hours. It's past noon. The phones have been ringing since 7. Every call is someone whose house is 90 degrees and they want to know when. My job is to take a list of people who are all hot and decide who gets cool first.

That's dispatch. That's the whole job. Everything else is paperwork.

How do you make that decision?

Del: Nobody hands you a manual. But everyone who does this long enough lands on the same logic.

First thing: is someone going to get hurt? Elderly person living alone, no cooling, 115 outside. That's already a medical situation. It just hasn't become a medical event yet. Infant in the house, same. Someone on oxygen, dialysis, anything where their body can't compensate. Front of the line.

Then: is the system completely dead or just struggling? A house with zero cooling is different from a house where the AC runs all day and only gets to 82. Both are miserable. One of them kills people.

And then the third question, which is the one nobody wants to talk about: do they have a service contract with us? Contract customers get priority. That's the deal. That's what they paid for. So you can have a situation where a property management company with a twenty-unit building and a maintenance agreement gets a truck before a single elderly tenant who called in as a new customer. The building has more people in it. The contract is a prior commitment. But the elderly person is more vulnerable.

I'm doing that math in my head forty times a day during a heat wave. There's no app for it.

That sounds like rationing.

Del: It is rationing. It just doesn't look like rationing because it looks like hold music. You're on hold for forty-five minutes? That's not a phone system problem. That's me triaging you below someone else.

Normal week, a tech gets to you in two, maybe four hours. During a heat event, we're booking into tomorrow by noon. The on-call tech after hours is looking at four to six, and that's if they pick up. They've been going since 6 a.m.¹ The caller doesn't see any of this. They just hear "we can have someone out Thursday."

What does the call volume actually look like during a heat emergency?

Del: Three to four times normal.² And it doesn't ramp up. Monday it's busy. Tuesday the phones don't stop. By Wednesday you're triaging the triage. You're making decisions about which decisions to make first.

And here's the part that'll make you want to throw something: the after-hours surcharge runs $85 to $225 on top of the service call.³ So I've got a slot open at 9 p.m. and the customer hears the price and says never mind. That slot goes to someone who can pay. The queue reorganizes itself around money whether I want it to or not.

You mentioned tenants. What happens when a renter calls?

Del: [long pause]

That's the part of this job that'll age you.

A renter calls. Their AC is dead. I can hear it in their voice. They're hot, they're scared, they've got kids. And the first thing I have to ask is: are you the homeowner or a tenant? Because if they're a tenant, I cannot dispatch without the landlord's authorization. The landlord has to approve the visit, approve the scope, approve the emergency rate.

In Texas, the law gives the landlord seven days after written notice to fix health-and-safety conditions.⁴ Seven days. You know what seven days at 95 degrees indoors does to a person? I do.

So the tenant calls me. I call the property manager. The property manager says they'll "check with the owner." The owner doesn't call back until tomorrow. Tomorrow the owner approves a diagnostic visit but not the repair. The tech goes out, diagnoses a bad capacitor. Fifteen-dollar part, twenty minutes to install. But now we need authorization for the repair cost. Another call to the property manager. Another day. Meanwhile the tenant is buying bags of ice at Circle K.

And that's the functional version. I've seen scenarios where the landlord's HVAC vendor won't even come out because the landlord hasn't paid their contractor account.⁵ The tenant's AC is dead and the reason isn't mechanical. It's a billing dispute they're not party to. That call goes nowhere. I never even get it.

Let's talk about parts. The refrigerant transition. How does that show up at your level?

Del: Oh, it shows up beautifully. [laughs]

Since January 2025, no new residential systems using R-410A are being manufactured.⁶ The replacement, R-454B, is mildly flammable. A2L classification. Requires new certifications, new tools, new recovery equipment. Training runs $200 to $500 per tech.⁷ I have nine technicians. Not all of them are A2L certified yet.

So when a call comes in, I need to know: is this an older R-410A system or a new one? Because if it's a new A2L system and I send a tech who isn't certified, that's a liability problem, not just a scheduling problem. I'm now dispatching based on refrigerant chemistry in addition to everything else.

And R-410A is still available for repairs, but supply is shrinking and price is climbing.⁸ R-454B had shortages through 2025. So "parts on order" is a real dispatch outcome. The tech drives out, diagnoses the problem, doesn't have the refrigerant, and leaves. The customer waits for a return trip. Their spot in the queue doesn't close. It just... suspends. The room keeps getting warmer while the part sits on a truck somewhere in Nevada.

You're in Maricopa County. The 2025 heat death numbers...

Del: Four hundred and thirty.⁹

You know the number.

Del: I know all the numbers. Ninety-four percent of the people who died indoors had AC in their home. Seventy-two percent of those units weren't functioning.⁹ Fifty-three people were found through welfare checks, meaning nobody knew they were in trouble until someone came looking.

That 72 percent. That's my queue. That's the gap between AC present and AC cooling. Every one of those units could have been a dispatch call that came in too late, or got stuck behind a landlord authorization, or needed a part on backorder, or the person couldn't afford the after-hours rate. The unit was there. The repair wasn't.

Does that change how you do the job?

Del: It makes the vulnerability questions mandatory. When someone calls and they're 75 and alone, that's not a scheduling preference. Ninety percent of indoor heat deaths in Maricopa were people over 50.⁹ I know what the actuarial table looks like for my queue. I don't need a model. I have a phone and a whiteboard.

Houston is considering an ordinance that would require landlords to provide and maintain AC in rental housing.¹⁰ Does a legal right to air conditioning change anything for you?

Can you expand on that?

Del: The tenant hears "right to AC" and calls me expecting same-day service. The landlord hears "mandate" and calls me for a compliance quote. Neither of those calls produces cold air without a certified technician, the correct refrigerant, an authorized work order, and an open slot in my queue.

I'm not against the ordinance. I hope it passes. But I'm telling you what I see from the dispatch side: the last mile of any housing right is a person in a van with the correct parts. And I'm the one who decides when that van leaves.

What do you wish people understood about this job?

And I'm sitting here with a headset and a whiteboard trying to make nine trucks cover a county where 430 people died last summer from the heat. The math doesn't work. It hasn't worked for years. I just keep doing it because the alternative is nobody does it.

Del's phone buzzed three times during that last answer. She glanced at it, said "Wednesday," and picked up.

Footnotes

1. BLS notes HVAC technicians "may be on call for emergencies and sometimes work overtime or irregular schedules during peak heating and cooling seasons." Occupational Outlook Handbook, August 2025 ↩

2. Industry sources report call volumes surging 300–400% during extreme weather events. Figures are practitioner-reported, not independently verified federal data. Callin.io, March 2025; Alternative Aire, March 2026 ↩

3. Emergency after-hours surcharges documented at $85–$225 above standard service call rates. National AC Solutions, April 2026 ↩

4. Texas Property Code §92.056 requires landlords to repair health-and-safety conditions within 7 days of written notice. Texas State Law Library ↩

5. Based on a documented 2025 case in which a tenant's HVAC vendor refused service because the landlord had not paid the contractor's account. Justia Ask A Lawyer, September 2025 ↩

6. Under the EPA Technology Transitions rule, manufacturers were prohibited from producing or importing new R-410A residential systems starting January 1, 2025. A July 2026 final rule allows continued installation of pre-2025 stock until depleted. NAHB, May 2026 ↩

7. A2L certification training costs $200–$500 per technician; new A2L-rated systems cost 10–20% more than R-410A predecessors. HVACProposalKit, March 2026 ↩

8. R-410A remains available for repair but supply is decreasing under the HFC phasedown. R-454B experienced documented shortages and price increases through 2025. ACDirect, May 2026 ↩

9. Maricopa County Department of Public Health, "2025 Heat-Related Deaths Report," April 2026. 430 heat-related deaths; 94% of indoor deaths had AC present; 72% of those units were not functioning; 53 of 111 indoor deaths discovered via welfare check; 90% of indoor deaths were people aged 50+. County report ↩ ↩² ↩³

10. Houston Chronicle reported July 13, 2026 on a proposed ordinance requiring landlords to provide and maintain refrigerated air equipment in rental housing. As of publication, no official ordinance text has been enacted. The proposal would allow central air, window units, portable units, or other refrigerated equipment. ↩