Gree line set sizes
The right line set diameter for your Gree mini-split by series and capacity — across Sapphire, Livo+, Vireo, and Terra — plus the length limits and why Gree keeps a 1/4" liquid line on most sizes. Prefer to size by run length too? Use the size calculator.
Gree line set size by capacity
Line set diameter is set by your system's capacity and series. Match your Gree unit's BTU rating to the typical liquid-and-suction pair below — but read the next section first, because Gree's suction size shifts by series.
| Gree system size | Typical line set (liquid × suction) |
|---|---|
| 9,000 BTU | 1/4" × 3/8" or 1/4" × 1/2" (by series) |
| 12,000 BTU | 1/4" × 3/8" or 1/4" × 1/2" (by series) |
| 18,000 BTU | 1/4" × 1/2" or 1/4" × 5/8" (by series) |
| 24,000 BTU | 1/4" × 5/8" |
| 36,000 BTU | 1/4" × 5/8" |
Gree spreads each capacity across several series, and the suction size can differ between them. A 12,000 BTU Livo+ runs 1/4" × 3/8", while a 12,000 BTU Sapphire or Terra steps the suction up to 1/2". One Gree quirk: several series keep a 1/4" liquid line even on 24k and 36k units, where most brands move to 3/8". Always confirm the exact diameters against your model's manual before buying.
Gree sizes vary by series — check your exact model
Gree sells the same BTU rating across the Sapphire, Livo+, Vireo, and Terra series, and the suction line can differ between them. The clearest example is the suction size at 9k and 12k: lighter series run 3/8", while the Sapphire and Terra step up to 1/2". Don't size a Gree by capacity alone — read the connection pipe diameter in your model's installation manual and match it exactly.
Field-flared, not quick-connect
Gree mini-splits use standard field-flared line sets, not pre-charged quick-connect. You flare the copper ends and pull a vacuum to remove air and moisture before opening the service valves — work that typically needs a vacuum pump and EPA 608 certification. Shop standard line sets for a Gree install, or see pre-charged line sets if you want the no-vacuum route on a compatible system.
Gree line set length limits
Diameter is only half the spec. Your Gree system also limits how long the line set can run and how far the indoor and outdoor units can sit apart in height — and those limits move with the series. Plan your run to the figures below, then confirm the exact limits for your model in its installation manual.
| Minimum line length | Maximum line length | Max vertical separation | Pre-charged for |
|---|---|---|---|
| 10 ft (3 m) | 49–164 ft by series | 33–98 ft by series | 25 ft |
Gree's run limits depend on the series and capacity. Smaller 9,000–12,000 BTU units typically allow about 50 ft of line with up to 33 ft of vertical separation, while larger units reach much further — the Sapphire series, for example, scales to about 131 ft at 18k and 164 ft at 24k, with up to 98 ft of lift. The factory charge covers about the first 25 ft; beyond that an HVAC pro adds refrigerant, roughly 0.21 oz per foot on smaller units and 0.54 oz per foot on larger ones. Gree lists a minimum run of about 10 ft to limit noise and vibration.
Refrigerant: R-410A and R-32
Gree single-zone systems sold in North America run R-410A, and Gree now offers R-32 versions of the Sapphire, Livo, and Vireo lines. The copper line set is the same either way, but your vacuum pump, gauges, and any field charge must match your unit's refrigerant — confirm which your model uses before buying tools or adding refrigerant.
How to find your Gree model's line set size
- Identify the series and capacity. Note the model number and series (Sapphire, Livo+, Vireo, Terra) and the BTU — the suction size depends on the series, not just the capacity.
- Check the installation manual. It lists the exact liquid and suction diameters, the maximum line length, the vertical lift, and the refrigerant for your model — the final word.
Common questions
What size line set does a Gree 12,000 BTU use?
It depends on the series. A 12,000 BTU Gree Livo+ uses 1/4" liquid with a 3/8" suction line, while a Sapphire or Terra steps the suction up to 1/2" (1/4" × 1/2"). Confirm against your model's installation manual.
Does Gree use a 1/4-inch liquid line on large units?
Often, yes. Unlike most brands that move to a 3/8" liquid line at 24,000 BTU and up, several Gree series such as Livo+ and Vireo keep a 1/4" liquid line with a 5/8" suction line even on 24k and 36k units. Always match the exact diameters in your model's manual.
What is the minimum line set length for a Gree mini-split?
Gree specifies a minimum line set length of about 10 feet (3 m) to limit noise and vibration. Keep your run at or above that and confirm the figure in your model's manual.
What is the maximum line set length for a Gree mini-split?
It depends on the series and capacity. Smaller 9,000–12,000 BTU units typically allow about 50 ft, while larger units reach much further — the Sapphire series scales to about 131 ft at 18k and 164 ft at 24k, with up to 98 ft of vertical separation. The factory charge covers about the first 25 ft; beyond that an HVAC pro adds refrigerant. Confirm your unit's maximum in its manual.
This page provides general guidance on Gree mini-split line set sizing based on published Gree specifications. Exact line diameters vary by series and model, and lengths, maximum line length, vertical lift, and refrigerant (R-410A or R-32) differ by unit — always verify against your unit's official installation manual before purchasing or installing.