Yes, it can. An Ohio River Valley homeowner reported that a 2-ton Daikin Fit ducted air-source heat pump cooled their whole 2,160-square-foot house through August for just 292 kWh of electricity, which came to $61.32 at their $0.21-per-kWh rate.

The story, shared on Reddit’s r/HeatPumps and covered by The Cooldown, is a useful real-world data point on heat pump cooling. It does not mean every heat pump will cool every home that cheaply. Sizing, insulation, shade, and climate did heavy lifting behind that number. Here is what the story shows and what to check before you make the switch.

What the Ohio Homeowner’s Story Actually Shows

The verified details are specific. The system was a 2-ton Daikin Fit ducted air-source heat pump serving the entire 2,160-square-foot house. August cooling totaled 292 kWh, and at $0.21 per kWh that is $61.32 for the month. On August 16, the hottest day the homeowner tracked, outdoor temperatures swung from 76 to 97 degrees Fahrenheit and the system used 19 kWh that day.

The homeowner also compared summer and winter performance. January used 0.21 kWh per degree day versus 0.31 in August, a gap the poster attributed to the latent heat load: summers in the Ohio River Valley are humid, and wringing moisture out of the air costs energy.

The comments added a second data point. Another homeowner in the Philadelphia suburbs reported cooling 2,000 square feet with a 3-ton Midea unit for only 135 kWh in August, crediting shade and insulation upgrades and writing they were “convinced it’s the shade doing the heavy lifting.”

The original poster agreed, noting they had measured ground temperatures 20 degrees Fahrenheit lower in shade than in full sun. The takeaway is not that heat pumps are magic. It is that a right-sized unit plus shade and a tight envelope can make summer cooling remarkably cheap.

How Heat Pump Cooling Works

A heat pump is essentially an air conditioner that can run in reverse. In cooling mode, the reversing valve flips the refrigeration cycle: the indoor coil becomes the evaporator, absorbing heat from your indoor air, and the refrigerant carries that heat to the outdoor unit, where it is released outside. Electric compressors do the moving; no heat is generated, which is why the process is so efficient. In winter the same system reverses again and pulls heat from outdoor air into the home.

Because heat pump cooling moves heat rather than generating it, a properly sized system can keep a whole house comfortable on surprisingly little electricity.

Sizing: the Rule of Thumb and Its Limits

Here is where the Ohio story gets interesting. The classic contractor rule of thumb is to divide a home’s square footage by 500 to estimate the tonnage needed, with one ton equal to 12,000 BTU. Another common version says every 500 to 600 square feet needs one ton of capacity.

By that math, a 2,160-square-foot home calls for roughly 4 tons of heat pump cooling capacity. Yet this homeowner’s 2-ton unit handled the whole house through a 97-degree day.

That gap is the point. Rules of thumb are notorious for oversizing systems. An analysis of real Massachusetts home data found that square-footage rules routinely oversized heat pumps by a wide margin, and the industry standard remains a proper Manual J load calculation, which accounts for insulation, windows, air leakage, and climate. An oversized unit short-cycles, wastes energy, dehumidifies poorly, and wears out sooner. If a contractor sizes your system from square footage alone, get a second opinion.

5 Things to Check Before Switching

1. Insulation and air sealing. A leaky envelope forces any cooling system to work harder. Upgrading insulation shrinks the load your heat pump must meet, which is exactly why our breakdown of home insulation savings pairs so well with this topic.
2. Ductwork. Leaky or undersized ducts waste heat pump cooling before it reaches your rooms. Have ducts inspected and sealed; in older Ohio Valley homes this alone can transform performance.
3. Your climate. Heat pumps handle humid summers well, but sizing for both heating and cooling loads matters in regions with cold winters. Cold-climate models exist for a reason.
4. Your electrical panel. Heat pumps need a dedicated circuit, and older 100-amp panels sometimes need an upgrade to handle the load.
5. Your installer. Insist on a Manual J load calculation and get at least three quotes. The cheapest bid that skips the math is the most expensive mistake.

What It Costs: the Honest Version

Installation costs vary too widely to quote responsibly: system size, ductwork condition, electrical work, and region all move the number. What we can say with sources: analyses summarizing U.S. Department of Energy data put air-source heat pump heating savings at roughly 30 to 50 percent versus fossil-fuel systems and up to 75 percent versus electric resistance heating like baseboard heaters.

On the heat pump cooling side, the payoff comes from the unit’s efficiency rating (SEER2) and, as the Ohio story shows, from pairing the system with shade and a well-insulated envelope. Check current federal and state incentives before you buy; they can meaningfully offset the upfront cost.

The bottom line: a heat pump can absolutely cool a 2,160-square-foot home. Whether it does so for $61 a month depends on the house around it.

Sources: The Cooldown’s coverage of the Ohio homeowner story; honestfix.com; gtheatpump.com