Quick Answer: Della is a budget-tier mini split brand owned by Heat Controller Inc., sold in multiple named series rather than one lineup — Motto is the cheapest entry point (about $749.96 for 12k, roughly 19-20 SEER2), Optima Hyper Heat is the cold-climate pick (about $894.96-$914.96 for 12k, 23-25 SEER2, HSPF2 10, rated to -13°F), and Serena trades efficiency claims for a lifetime warranty built in from the box rather than requiring registration. Every current single-zone Della model ships pre-charged for a fixed line-set length, but Della’s own install guide still calls for flare connections and a vacuum pump on longer runs — so it’s DIY-friendly for a short run, not a true no-license MRCOOL alternative. Register any non-Serena Della unit within 100 days and standard 5-year-compressor/1-year-parts coverage extends to lifetime parts, per Della’s own warranty page.
Della shows up in this site’s budget roundups already, but it’s never gotten a standalone review — worth fixing given how differently its three main series are actually positioned once you look past the shared “cheap mini split” reputation.
Della tiers compared
| Tier | Efficiency | Install type | 12k typical price | Best for |
|---|---|---|---|---|
| Motto | ~19-20 SEER2 | Pro (pre-charged short run / flare+vacuum for longer runs) | ~$749.96 | Lowest sticker price |
| Optima / Optima Hyper Heat | ~23-25 SEER2, HSPF2 10 | Pro (same) | ~$894.96-$914.96 | Cold-climate heating to -13°F |
| Serena | Not separately published | Pro (same) | from ~$779.96 | Lifetime warranty with no registration step |
1. Motto — Best Budget Pick
Della Motto (12,000 BTU)
- Motto is the cheapest way into the Della lineup, priced at roughly $749.96 for a 12k single-zone unit directly through Della's own site as of September 2026 — undercutting Klimaire's Entrada tier by a few hundred dollars at a comparable BTU size.
- Like every current single-zone Della model, Motto ships pre-charged for a fixed run length (commonly 16.4 ft or 24.5 ft, per Della's published install guide), so a short, straight line-set install adds no refrigerant step — but a longer or bent run still needs a technician with a vacuum pump and micron gauge.
- SEER2 sits in the same range as Senville's LETO and Klimaire's Entrada tier, so the real reason to pick Motto over either is price, not efficiency.
Motto is the tier to start with if the job is a single, low-stakes room — a garage, workshop, or spare bedroom — and shaving the last $100-150 off equipment cost matters more than chasing a higher SEER2 number.
2. Optima Hyper Heat — Best for Cold Climates
Della Optima Hyper Heat (9k-23k BTU range)
- Optima Hyper Heat is Della's answer to Mitsubishi's H2i and MRCOOL's Hyper Heat line — Della's own product pages rate it down to -13°F with an HSPF2 of 10 (Region IV), putting its cold-climate heating floor in the same neighborhood as Klimaire's mid-tier and meaningfully colder than Della's own Motto and Umbra series.
- A 12k-equivalent unit runs roughly $894.96-$914.96 direct from Della — more than Motto, but still well under Mitsubishi's Hyper-Heat pricing for buyers who don't need Mitsubishi's dealer network.
- Refrigerant is R-454B on the Optima Hyper Heat line specifically, distinct from the R-32 used across Della's Motto and Umbra series — worth checking the exact SKU's data plate if you're trying to match refrigerant type to a specific service tool or local code requirement.
If you’re sizing a cold-climate install and comparing Della against the rest of the field, see our best mini split heat pump roundup for how -13°F stacks up against Mitsubishi’s and MRCOOL’s Hyper Heat ratings.
3. Serena — Best Warranty, No Registration Required
Della Serena
- Serena is Della's warranty-first tier rather than its highest-efficiency one — Della doesn't publish a distinct SEER2 rating for Serena separate from its standard range, so don't assume the "premium" name means better cooling numbers than Optima.
- The real differentiator is that Serena ships with a **lifetime warranty already included**, with no 100-day registration step required to unlock it — every other current Della tier requires registering within 100 days of purchase just to get from the base 5-year-compressor/1-year-parts term up to that same lifetime parts coverage.
- Pricing starts around $779.96, which is actually cheaper than a 12k Optima Hyper Heat unit despite the "premium" positioning — a genuine value gap if warranty certainty matters more to you than the coldest heating rating in Della's lineup.
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Where Della fits against Senville, Klimaire, and MRCOOL
Della’s closest competitor on this site is Senville’s LETO tier — both are pro-install budget brands in a similar SEER2 range with comparable sticker prices. Where Della pulls ahead is warranty structure: a 100-day registration window to lifetime parts coverage is longer and more generous than Klimaire’s tight 45-day cutoff (see our mini split warranty registration guide for how every brand’s deadline compares), and Serena skips the registration step entirely. Where Della falls short of MRCOOL and Klimaire’s Quick Connect DIY line is the install claim itself — Della’s pre-charged fixed-length line set only avoids the vacuum-and-flare step on a short, straight run, while a genuine quick-connect system skips that step regardless of run length. See our mini split refrigerant guide for why that vacuum step is also what triggers the EPA Section 608 licensing requirement Della’s short-run installs can sidestep. For the full field, see our mini split brands breakdown.
The bottom line
Buy Motto if the job is a single low-stakes room and minimizing sticker price is the priority. Pick Optima Hyper Heat if you need genuine cold-climate performance down to -13°F and don’t want to pay Mitsubishi- or MRCOOL-level prices for it. Go with Serena if warranty certainty matters more than efficiency bragging rights — it’s Della’s only tier that skips the 100-day registration step and still lands cheaper than Optima. Whichever tier you pick, remember Della’s “pre-charged” claim only means no-vacuum on a short run — a longer line set still needs a licensed technician with a vacuum pump, unlike MRCOOL’s or Klimaire’s true quick-connect DIY lines. Still weighing Della against the rest of the field? See our best budget mini split roundup for how it compares against Senville LETO and MRCOOL DIY on total installed cost.