"American electricity rates are at their highest in 10 years." Retired HVAC installer explains why your electric bill is so high and which device can save you hundreds this summer.
American households are paying more for electricity than at any point in the past decade. In 2025, the average U.S. household spent $784 on summer cooling — a 12-year record. In Arizona, that number climbed to $1,060. Texas, Nevada, Florida, and California residents are seeing similar increases.
Utility rates have risen 23% since 2019. And they're not going down. The Energy Information Administration confirms: heating and cooling now account for nearly half of the average American home's electricity use — the single largest category, by far.
Most homeowners assume there's nothing to do about it. The AC runs. The bill comes. You pay it. That's summer.
But a retired HVAC installer from Phoenix says almost every American with central air conditioning is making the same expensive mistake — night after night, month after month. And once you see it, you can't unsee it.
The Insider Speaks
Frank Delgado spent 30 years installing central air conditioning systems across the Phoenix metro area. He's crawled through more attics, cut into more walls, and connected more ductwork than most of us can imagine. He knows this system — inside and out.
And he says most Americans are using it in a way that costs them hundreds of dollars every summer, unnecessarily.
"Central air was designed to cool a whole house evenly. And it does that well. The problem is: nobody actually uses their whole house at once. You're in the bedroom at night. In the home office by day. On the couch in the evening. But the AC? It's cooling every room. Every hallway. Every closet. All night. All day."
He pauses, then leans forward.
"It's like leaving every light in the house on because you want to read in bed. If I said that to you, you'd think it was crazy. But we do it with air conditioning every single night."
Delgado has done the math with his own former customers. And the numbers are eye-opening.
- Central AC power draw: 3,000–5,000 watts per hour
- Overnight run (8 hours): 24–40 kWh per night
- Cost per night at national average ($0.17/kWh): $4 – $7
- Cost over a 90-night summer: $360 – $630 — just for overnight cooling
- Portion of your home actually occupied at night: typically 10–15% (one bedroom)
- Result: You're paying to cool 85–90% of a house nobody's in
Why Americans Do This Anyway
"People do this for two reasons," Frank says. "One: they don't realize there's another option. Two: the ones who do — like zoned HVAC systems or mini-splits per room — cost $6,000 to $15,000 to install. So most families just accept the waste."
The wealthier households solve this with zoning systems — separate thermostats and dampers that only cool the rooms you're using. But the installation cost puts them out of reach for most Americans.
The alternative? Everyone else runs central AC through the entire house every night, hoping the electric bill stays manageable. It doesn't.
"The good news is: the fix costs less than $60."
What Frank Now Recommends to Every Family Member
When Frank retired last year and moved into a smaller Phoenix home, he did what he'd been recommending to his family for years — and stopped running his central AC through the night.
"My July bill last year, running central AC overnight: $340. This July, using a portable evaporative cooler in my bedroom and turning off central AC after 9pm: $190. That's $150 back in my pocket — in one month. And the funny thing is, I sleep better now, because the room is actually cooler than the AC ever got it."
He's talking about a compact device called CubeChill — a portable evaporative cooler that uses the same physics as the human body cooling itself through sweat. Water passes through cooling pads, air blows through them, evaporation pulls heat from the air. The result: cooler, slightly humidified air, delivered directly to the room you're actually in.
No installation. No ductwork. No refrigerant. Just water and a whisper-quiet fan.
"I know this sounds too simple. But I've spent 30 years in HVAC and I'm telling you: the physics works. Central AC is a sledgehammer. What most people actually need is a targeted tool."
The Three Things That Made Him Recommend It
Point 1: It only uses 50–100 watts. Compared to a central AC pulling 3,000–5,000 watts, this is a fraction. Frank did the calculation himself: at $0.17/kWh, an 8-hour night run costs about 15 cents — versus $4–7 for central AC. That's a ratio of roughly 30 to 1.
Point 2: It moves with you. "This is the big one. Bedroom at night. Home office during the day. Living room in the evening. Same device. One room at a time. You never cool a space you're not using."
Point 3: It doesn't dry out the air. "Central AC pulls indoor humidity down to 30–40%. That's why so many people wake up with a dry throat and stuffy sinuses. Evaporative cooling does the opposite — it adds moisture. In dry states like Arizona, Texas, or Nevada, that's actually a benefit, not a downside."
A Note on Climate
Frank is direct about one thing: evaporative cooling works best in dry climates.
"Anywhere the summer air is dry — the Southwest, most of Texas, the Central US, most of the country away from the coasts — this works great. In humid coastal areas like Florida, Louisiana, or coastal Georgia, evaporative cooling is less effective. It's honest physics."
For the majority of American households — roughly 200+ million people living in dry-summer climates — the numbers work.
"After the first week I was convinced. My electric bill confirmed it. And I've been recommending it to every family member and former client since."
How It Compares — Point by Point
What Users Are Saying
"My July electric bill last year in Scottsdale was $420. This July, I put a CubeChill in my bedroom and stopped running the central AC after 9pm. The bill was $260. That's $160 saved in one month. I bought two more for the living room and home office."
"I'm a night-shift nurse. When I get home at 7am to sleep, running the whole-house AC for hours just for me felt insane. The CubeChill cools my bedroom in 20 minutes. I can't hear it. And my electric bill dropped by almost $200 last month."
"My wife and I have different temperature preferences. She freezes on 74°F, I'm still hot. Now we have one CubeChill on each side of the bed, and the thermostat is set to a reasonable 78°F. Peace at home, and the electric bill dropped $110 last month."
"I bought one for my mother-in-law in a retirement community where they cap the AC settings. She sleeps through the night now. Sends me a text every morning. Worth every dollar."
"I was skeptical. I'd tried gimmicky 'personal AC' units before — total waste of money. This one is different. It actually cools the room, doesn't just blow air in your face. And running it costs pennies compared to central AC."
SUMMER SALE — 40% OFF CubeChill
For a limited time, the manufacturer is offering their deepest discount of the year: