Keystone · Model KSTAP121HINV
14,000 BTU Inverter Portable Air Conditioner w/Remote - With Heat
A portable air conditioner rated at 14,000 BTU (12,000 BTU SACC) for rooms up to 550 sq ft. It heats in winter too and needs no installation.
$649.99
Live price at SylvanePrice checked Oct 27, 2026
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Will it cool your room?
This unit's cooling matches your 500 sq ft room.
The portable units we list are not ENERGY STAR certified, and portables are rated on a different (SACC) basis that is not comparable to the nameplate-BTU estimate the window figure uses, so there is no honest dollar figure to show here. As a category, portables (single-hose models especially) usually run less efficiently than a comparable window unit.
At a glance
Best for renters and rooms where you cannot install a fixed unit.
Performance
- Cooling capacity
- 14,000 BTU · 12,000 BTU SACC
- Heating capacity
- Yes
- Room coverage
- up to 550 sq ft
- Energy Star
- Not published
- CEER
- 14.2
- Annual energy (cooling)
- Not published
Noise, size & features
- Model number
- KSTAP121HINV
- Indoor noise
- 56 dB(A)about as loud as a dishwasher
- Outdoor noise
- Not published
- Indoor unit
- 19.5 x 32.5 x 16.7 in
- Outdoor unit
- None
- Refrigerant
- R-32
- Wi-Fi / app
- Not published
- Outdoor unit needed
- No
- Power supply
- 115 V, NEMA 5-15P plug
- Warranty
- 1-Year Parts and Labor Limited Warranty
Supply voltage, plug, refrigerant and warranty are from Sylvane's published specifications for this exact configuration, checked Oct 2, 2026.
What is good
- Its CEER 14.2 is more efficient than 18 of the 23 other portables we list with a published CEER.
- Heats as well as cools, which 8 of the 46 portables we list offer.
- Uses R-32 (GWP 675), the low-GWP class new US residential equipment moved to.
What to watch
- At 56 dB(A) it is louder than 26 of the 32 other portables we list that publish a noise figure.
Installation & the rules that apply
This is a portable monobloc. The most regulation-light option by far. No EPA Section 608 certified technician is needed because the refrigerant circuit is factory-sealed and never opened, no building or mechanical permit is triggered since nothing is fixed to the structure, and a landlord has little ground to refuse a unit that leaves no permanent alteration. The real constraints are your lease or HOA rules on how the window kit looks from outside, and noise to neighbours.
Plug and play
R-32
Common questions about the Keystone 14,000 BTU Inverter Portable Air Conditioner w/Remote - With Heat
- How loud is the Keystone 14,000 BTU Inverter Portable Air Conditioner w/Remote - With Heat?
- 56 dB(A) indoors, about as loud as a dishwasher.
- How energy-efficient is the Keystone 14,000 BTU Inverter Portable Air Conditioner w/Remote - With Heat?
- Its efficiency rating is CEER 14.2.
- What size room does the Keystone 14,000 BTU Inverter Portable Air Conditioner w/Remote - With Heat cool?
- It is rated to cool a room up to 550 sq ft, which matches its SACC: ENERGY STAR's sizing chart gives the 12,000 BTU (SACC) the Department of Energy certifies it at a room up to 550 sq ft. Its box says 14,000 BTU.
- Do I need a professional to install the Keystone 14,000 BTU Inverter Portable Air Conditioner w/Remote - With Heat?
- No. It is a portable monobloc you can fit yourself, no professional needed. No permission needed.
- Does the Keystone 14,000 BTU Inverter Portable Air Conditioner w/Remote - With Heat heat as well as cool?
- Yes. It also heats.
Is a portable even the right type?
Compare portables against the other types on price, noise, efficiency and install.
Buying guides for a portable monobloc like this
The questions buyers ask, answered from live prices and real specs. See where a portable monobloc like this fits.
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$649.99
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