Brand guide · United States · checked October 19, 2026

Quilt heat pumps

Quilt is made by Quilt Systems, Inc., an independent venture-backed startup. ENERGY STAR lists 3 Quilt outdoor models certified for the US, 3 of them cold-climate, and its best certified pairing heats at a COP of 2.00 at 5°F.

Certified for the US 3 outdoor models 4 certified pairings

Cold-climate 3 models meet ENERGY STAR Cold Climate

Best COP at 5°F 2.00 best HSPF2 12.0 · best SEER2 25.3

Warranty in the US 10-year parts, 10-year compressor no registration needed

Quilt at a glance

Who owns it: Quilt Systems, Inc., an independent venture-backed startup. It raised a $20M Series B (led by Energy Impact Partners and Galvanize, Dec 2025) for $64M in total. No change of control.
Headquarters: Redwood City, California, USA
Where it's made: Designed in California; built in Vietnam, China and Malaysia by partner manufacturers (Quilt FAQ)
How it's sold: Contractor-installed
Price tier: Premium. No 2026 price list. Quilt says pricing is 'in line with other high-efficiency heat pumps' and partners quote each home. Its pricing page, left over from the 2024 direct-install launch, still shows US$6,499 per room before rebates. Since May 2026 partners can offer Palmetto's 10-year Comfort Plan lease with no upfront cost where both companies operate.
What it makes: ductless mini-split, multi-zone
Names on ENERGY STAR's list: Quilt (certified by Quilt Systems, Inc)

Product lines

The current residential heat pump lines we found on Quilt's own pages, with the low-temperature claim in the maker's words. 2 of 2 are sold as cold-climate.

Quilt heat pump lines
Line	Type	Cold-climate	Maker's low-temperature claim	Refrigerant
Quilt 2-zone system (outdoor unit QO1-M2Z18 + Quilt wall units)	multi-zone	Yes	"100% of its rated heating capacity down to −5°F": 18,000 BTU/h at -5°F (-21°C); 16,000 BTU/h at -13°F (-25°C); keeps heating down to -15°F; ENERGY STAR Cold Climate	R-32
Quilt 3-zone system (outdoor unit QO1-M3Z27, shipping since Feb 2026)	multi-zone	Yes	28,200 BTU/h at -5°F (-21°C) and 23,900 BTU/h at -13°F (-25°C) (rated 27,000 BTU/h at 47°F); ENERGY STAR Cold Climate	R-32

Certified models with the best cold-weather numbers

From ENERGY STAR's list for the US (updated October 19, 2026): each row is one outdoor unit with its best certified pairing. 3 of 3 Quilt outdoor models use R-454B or R-32; the tables show those.

Mini-splits and multi-splits (3 models)

Quilt Mini-splits and multi-splits with the best ratings at 5°F
Outdoor / indoor model	Size	Heat at 5°F	COP at 5°F	HSPF2	SEER2	Refrigerant	AHRI #
QO1-M3Z27-NC-NA Quilt	27,000 BTU/h 2-ton	30,000 BTU/h 111% of rated	2.00	12.0	25.3	R-32 ENERGY STAR Cold Climate	217933624
QO1-M2Z18-NC-NA Quilt	18,000 BTU/h 1.5-ton	18,000 BTU/h 100% of rated	2.00	12.0	25.0	R-32 ENERGY STAR Cold Climate	214609234
QO1-M3Z27-NC*NA Quilt	24,000 BTU/h 1.5-ton	24,000 BTU/h 100% of rated	1.90	11.0	20.0	R-32 ENERGY STAR Cold Climate	218457833

Most efficient for cooling

Quilt systems with the highest SEER2
Outdoor / indoor model	Size	SEER2	EER2	HSPF2	COP at 5°F	Refrigerant	AHRI #
QO1-M3Z27-NC-NA Quilt	27,000 BTU/h 2-ton	25.3	13.7	12.0	2.00	R-32 ENERGY STAR Cold Climate	217933624
QO1-M2Z18-NC-NA Quilt	18,000 BTU/h 1.5-ton	25.0	14.5	12.0	2.00	R-32 ENERGY STAR Cold Climate	214609234
QO1-M3Z27-NC*NA Quilt	24,000 BTU/h 1.5-ton	20.0	12.3	11.0	1.90	R-32 ENERGY STAR Cold Climate	218457833

Look up any pairing by its AHRI number in the AHRI Directory ↗ or search the model in ENERGY STAR's product finder ↗. Ratings are for the exact indoor and outdoor pairing shown.

Warranty

In the US 10-year parts, 10-year compressor

Registration: No registration needed (claims need proof of purchase, serial number and installation date). Coverage rises to 12 years when installed by a Select or Expert partner and transfers to later owners of the home.

Labour: Not covered by Quilt; the owner pays labour for warranty repairs (installers may offer their own). Yearly professional maintenance is required.

Warranty terms (quilt.com) ↗

For comparison: in Canada 10-year parts, 10-year compressor

Same warranty as the US (it covers the continental US, Alaska, Hawaii and Canada): no registration, 12 years with Select/Expert partners, transferable

Strengths and watch-outs

Strengths

Class-leading efficiency: SEER2 25 (2-zone) / 25.3 (3-zone), HSPF2 12 (Region IV), CEE Tier 1
Holds 100% of rated heat to -5°F (-21°C) and about 90% at -13°F (-25°C); ENERGY STAR Cold Climate
10-12 year parts and compressor warranty with no registration, transferable, same terms in Canada
Room-by-room smart control with occupancy sensing and over-the-air updates (a fall 2025 update raised existing units' capacity)

Watch-outs

Young company (launched 2024) with a small installed base (nearly 1,000 units in Dec 2025)
Sold and installed only by Quilt Certified Partners, and coverage varies by address
Base warranty is 10 years (12 only with Select/Expert partners); labour isn't covered and annual professional maintenance is required
Ductless wall units only, with a maximum of 3 indoor units per outdoor unit and no ducted option

Which rebates Quilt models fit

Every model in these tables is ENERGY STAR certified, which is the federal equipment rule for the Home Electrification and Appliance Rebates where your state runs them. 3 Quilt outdoor models also meet ENERGY STAR Cold Climate, which several utility programs require. The 25C tax credit ended for heat pumps placed in service after December 31, 2025.

Rebate rules by metro:

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Sources

Model counts and ratings: ENERGY STAR Certified Heat Pumps, updated October 19, 2026. Brand facts checked October 19, 2026 on: