Hey folks, Mike Sanders here. If you're shopping for a PTAC (Packaged Terminal Air Conditioner), chances are you want something that just works. No surprises, no wasted money—just reliable comfort in the room it’s supposed to cool and heat. Whether you’re a property manager or just updating the unit in your guest room, this guide walks you through the nuts and bolts of buying the right PTAC for your space.
Step 1: Know Your Room Size (and Match the BTUs)
Let’s keep it simple. PTACs come in different BTU ratings—that’s how much heating or cooling power they have. A unit that’s too small won’t keep up, and one that’s too big will short cycle and waste energy.
| Room Size (sq ft) | Recommended BTUs |
|---|---|
| Up to 300 | 7,000 – 9,000 |
| 300 - 500 | 9,000 – 12,000 |
| 500 - 700 | 12,000 – 15,000 |
| 700+ | 15,000+ |
Pro Tip: If your space gets a lot of direct sun or houses electronics, size up slightly. If it's well-insulated, you might be able to size down.
Step 2: Pick the Right Voltage (208v vs 230v vs 265v)
You can't just plug a PTAC into any wall. These things need serious juice, and the voltage must match your building’s electrical setup.
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208/230v: Most residential and light commercial spaces use this. If you're not sure, it’s likely one of these.
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265v: Common in older or large-scale buildings. Don’t assume—check your breaker panel or ask an electrician.
See PTAC models by voltage type
Step 3: Choose Your Heating Option
PTACs offer a few heating choices, and it matters depending on how cold it gets where you live.
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Electric Heat: Basic and reliable. Best for warmer climates or backup use.
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Heat Pump: Efficient for moderate climates, especially where winters aren’t brutal.
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Hydronic Coils: Ties into your building’s boiler system. More complex but powerful.
Step 4: Wall Sleeve Size and Fit
Make sure the new unit fits your existing wall sleeve. Standard sleeves are 42 inches wide, but depth and venting can vary. If it’s a new install, make sure you get the correct sleeve and seal kit to prevent leaks and drafts.
Step 5: Decide on R-32 or Traditional Refrigerants
R-32 is the next-gen refrigerant with lower global warming potential. If you want something that’s future-proof, go with an R-32 unit.
Final Thoughts from Mike
PTAC shopping doesn’t have to be a guessing game. Figure out your room size, match the voltage, choose the heat type that fits your climate, and always double-check the wall sleeve. Trust me—get those things right, and you’ll have a system that runs quietly, efficiently, and won’t let you down.
And if you’re looking to skip the research and go straight to units that meet the latest specs, The Furnace Outlet has you covered with R-32 PTACs ready to ship.
