# DELLA Optima vs DELLA Serena

> Different factories: DELLA Optima's certified ratings match models TCL certifies under its own name; DELLA Serena's certified ratings match models AUX certifies under its own name. DELLA Optima has 2 products on sale across 1 category. DELLA Serena has 5 products on sale across 1 category, priced $679.96 to $1,499.96. Largest system: 12,000 BTU/h (DELLA Optima 12,000 BTU 115V wall mount system) against 24,000 BTU/h (DELLA Serena 24,000 BTU wall mount system). Highest SEER2 (cooling efficiency): 23 (DELLA Optima 9,000 BTU 115V wall mount system) against 22 (DELLA Serena 9,000 BTU wall mount system). Highest HSPF2 (heating efficiency): 10 (DELLA Optima 12,000 BTU 115V wall mount system) against 10 (DELLA Serena 24,000 BTU wall mount system). Most heat at 5 °F: 8,900 BTU/h (DELLA Optima 12,000 BTU 115V wall mount system) against 20,800 BTU/h (DELLA Serena 24,000 BTU wall mount system). Keeps heating in the coldest weather: -13 °F (DELLA Optima 9,000 BTU 115V wall mount system) against 5 °F (DELLA Serena 9,000 BTU wall mount system).

| | [DELLA Optima](https://minisplitfacts.com/lines/della-optima/) | [DELLA Serena](https://minisplitfacts.com/lines/della-serena/) |
|---|---|---|
| Launched | 2025 | 2025 |
| Products on sale | 2 | 5 |
| Categories | Single-zone systems (2) | Single-zone systems (5) |
| Price range | $899.96 – $899.96 | $679.96 – $1,499.96 |
| Largest system | 12,000 BTU/h (12,000 BTU 115V wall mount system) | 24,000 BTU/h (24,000 BTU wall mount system) |
| Highest SEER2 (cooling efficiency) | 23 (9,000 BTU 115V wall mount system) | 22 (9,000 BTU wall mount system) |
| Highest HSPF2 (heating efficiency) | 10 (12,000 BTU 115V wall mount system) | 10 (24,000 BTU wall mount system) |
| Most heat at 5 °F | 8,900 BTU/h (12,000 BTU 115V wall mount system) | 20,800 BTU/h (24,000 BTU wall mount system) |
| Keeps heating in the coldest weather | -13 °F (9,000 BTU 115V wall mount system) | 5 °F (9,000 BTU wall mount system) |
| Longest compressor warranty | none published | none published |
| Warranty if you install it yourself | Kept on 2 products | Kept on 5 products |
| Where sold | DELLA | DELLA |

## Questions

**Are DELLA Optima and DELLA Serena made by the same company?**
Different factories: DELLA Optima's certified ratings match models TCL certifies under its own name; DELLA Serena's certified ratings match models AUX certifies under its own name. [How we work it out](https://minisplitfacts.com/who-makes/).

**Which is cheaper, DELLA Optima or DELLA Serena?**
On the prices we have (as of October 14, 2026), the cheapest DELLA Optima system is the [9,000 BTU 115V wall mount system](https://minisplitfacts.com/products/della-optima-9k-115v-wall/) at $899.96, and the cheapest DELLA Serena system is the [9,000 BTU wall mount system](https://minisplitfacts.com/products/della-serena-9k-wall/) at $679.96. Prices are re-checked weekly.

**Which has more products, DELLA Optima or DELLA Serena?**
DELLA Optima: 2 products on sale across 1 categories. DELLA Serena: 5 across 1.

**Which is more efficient at cooling, DELLA Optima or DELLA Serena?**
By the brands' own figures: 23 for DELLA Optima ([9,000 BTU 115V wall mount system](https://minisplitfacts.com/products/della-optima-9k-115v-wall/)) and 22 for DELLA Serena ([9,000 BTU wall mount system](https://minisplitfacts.com/products/della-serena-9k-wall/)). Seasonal cooling efficiency under the 2023 test procedure. Higher uses less electricity.

**Which is more efficient at heating, DELLA Optima or DELLA Serena?**
By the brands' own figures: 10 for DELLA Optima ([12,000 BTU 115V wall mount system](https://minisplitfacts.com/products/della-optima-12k-115v-wall/)) and 10 for DELLA Serena ([24,000 BTU wall mount system](https://minisplitfacts.com/products/della-serena-24k-wall/)). Seasonal heating efficiency under the 2023 test procedure. Higher uses less electricity.

**Which puts out more heat at 5 °F, DELLA Optima or DELLA Serena?**
By the brands' own figures: 8,900 BTU/h for DELLA Optima ([12,000 BTU 115V wall mount system](https://minisplitfacts.com/products/della-optima-12k-115v-wall/)) and 20,800 BTU/h for DELLA Serena ([24,000 BTU wall mount system](https://minisplitfacts.com/products/della-serena-24k-wall/)). Heat output with 5 °F outdoors, from the certification record. Published for units certified for cold climates.

**Which keeps heating in colder weather, DELLA Optima or DELLA Serena?**
By the brands' own figures: -13 °F for DELLA Optima ([9,000 BTU 115V wall mount system](https://minisplitfacts.com/products/della-optima-9k-115v-wall/)) and 5 °F for DELLA Serena ([9,000 BTU wall mount system](https://minisplitfacts.com/products/della-serena-9k-wall/)). The lowest outdoor temperature the brand says it will still heat at. Output at that temperature is far below its rating.

**Which has the better warranty if you install it yourself, DELLA Optima or DELLA Serena?**
DELLA Optima publishes Kept on 2 of its 2 products; DELLA Serena publishes Kept on 5 of its 5 products. What the brand's warranty says when the owner installs the unit: kept, reduced, or void without a licensed installer. The quote is on the product page.

Full product lists with specs and sources: [DELLA Optima](https://minisplitfacts.com/lines/della-optima/index.md), [DELLA Serena](https://minisplitfacts.com/lines/della-serena/index.md). Page: https://minisplitfacts.com/vs/della-optima-vs-serena/

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MiniSplit Facts lists modular tool storage from every brand side by side, with a source for every spec. [How we compare](https://minisplitfacts.com/how-we-compare/). Data as of 2026-10-14.