Della / Optima Pro CloudAir Series Multi-Zone
Della Optima Pro CloudAir 20k R-454B 208/230V 3-Zone Mini-Split
The Della Optima Pro CloudAir 3-Zone 20k is the premium, smart-enabled top of Della's Optima family, driving three indoor heads off one 208/230V outdoor unit. It posts a nominal SEER2 of 27, EER2 15, HSPF2 10, on current low-GWP R-454B refrigerant, and is ENERGY STAR certified and AHRI cold-climate designated.
Unlike the standard Optima, its certified heating is higher at 17F than at 47F: 20,000 BTU at 47F, 23,000 at 17F and 19,800 at 5F. That SEER2 27 leads this Della group on efficiency.
Professional installation required; dealer-quoted.
Refrigerant generation
R-454B - current-generation refrigerant
Need this installed?
Get installation quotes
Image: Della
- Last sourced
- Jul 28, 2026
SplitAtlas score
9.0 / 10
(27.0 SEER2) among 18k systems
(10.0 HSPF2) among 18k systems
(5F certified capacity: 99% of the 47F rating; -22 F heating floor) among 18k systems
(6 verified features) across the catalogue
(7 manuals; spec sheet) across the catalogue
Not evaluated
- Installation accessibility — not applicable (professional install)N/A
professional install - DIY-accessibility not applicable
- Price-to-value — not evaluatedN/A
This is a professionally installed, quote-only system, so we can't score its price. Get an installed quote to compare real cost.
Get a quote
Key ratings
Best-fit use cases
A three-room home in a colder climate that wants Della value plus real certification, smart control, and deep-cold heat, over the cheaper but uncertified standard Optima.
Where this system ranks
Buyer review snapshot
Best for / skip if
Best for
- 3-zone projects in the 18k outdoor capacity class.
- Top efficiency shortlists; SEER2 is 27.
Install difficulty
- Electrical: 230V; MCA 18 A; breaker/fuse 30 A.
- Line set: Flared line connections; precharged 25 ft; max 197 ft.
- 3-zone condenser; indoor-head matching and branch layout are part of the job.
Availability and price context
This system needs a professional install, so its real price is an installed quote that depends on your home. We don't link to a listing for this exact model; get installation quotes to price it.
Source date
- Model data sourced
- Jul 28, 2026
- Page reviewed
- Jul 28, 2026
- Source-backed records
- 4
- Newest source retrieved
- Jul 28, 2026
Warranty tiers
No Base or Registered tier is established for scoring.
Model context
- Install path
- This is professional-install equipment; price it with an installed quote.
- Structured ratings
- Certification: ENERGY STAR certified, ENERGY STAR cold-climate certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-454B. Minimum heating ambient: -22 F.
Strengths
- Three zones with class-leading nominal SEER2 27 / EER2 15 / HSPF2 10.
- Certified at 23,000 BTU at 17F, above its 47F rating.
- Smart-enabled premium line on current low-GWP R-454B.
Weaknesses
- Priced above the standard Optima line.
- 20,000 BTU across three zones is modest per room; size each head.
Climate suitability
- Minimum heating ambient
- -22 F[1]
- Certified heating at 5F
- 19,800 BTU/hNon-Ducted Indoor Units[3]
- Rated heating at 17F
- 23,000 BTU/hNon-Ducted Indoor Units[3]
- Rated heating at 47F
- 20,000 BTU/hNon-Ducted Indoor Units[3]
Specifications
ShowHide
- Manufacturer
- Della
- Brand
- Della
- Product line
- Optima Pro CloudAir Series Multi-Zone
- Model number
- 048-TPH-MODU-1D3
- Indoor unit model
- Depends on the indoor units you choose
- Outdoor unit model
- 048-TPH-MODU-1D3
- Number of zones
- 3
- Max indoor units
- 3 units[2]
- Rated cooling capacity
- 20,000 BTU/hNon-Ducted Indoor Units[3]
- Rated heating capacity
- 20,000 BTU/hNon-Ducted Indoor Units[3]
- Voltage
- 230 V[2]
- MCA
- 18 A[2]
- Maximum fuse or breaker size
- 30 A[2]
- Breaker needed
- not published
- SEER2
- 27 SEER2Non-Ducted Indoor Units[3]
- EER2
- 15 EER2Non-Ducted Indoor Units[3]
- HSPF2 (Region 4)
- 10 HSPF2Non-Ducted Indoor Units[3]
- HSPF2 (Region 5)
- Varies by indoor-unit combination
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2 COPNon-Ducted Indoor Units[3]
- Minimum outdoor heating temperature
- -22 F[1]
- Minimum outdoor cooling temperature
- not published
- Maximum outdoor temperature
- 131 F[1]
- Indoor noise range
- Depends on the indoor units you choose
- Outdoor noise rating
- 62 dBA[2]
- Indoor weight
- Depends on the indoor units you choose
- Outdoor weight
- 119 lb[2]
- Refrigerant
- R-454B[3]
- Refrigerant charge
- 77.6 oz[2]
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in per zone liquid / 3/8 in per zone; adapters for larger indoor units when required suction
- Included line-set length
- Depends on the indoor units you choose
- Maximum line-set length
- 197 ft[2]
- Max line set per indoor
- 98 ft[2]
- Maximum elevation difference
- 49 ft[2]
- Max height between indoor units
- not published
- Wi-Fi support
- Depends on the indoor units you choose
- Energy Star status
- ENERGY STAR certified[4]
- AHRI certification number
- 218471007Non-Ducted Indoor Units[3]
- Warranty
- Della warranty terms vary by registration and installation context; product pages expose Warranty Registration / Warranty Policy links.
- Install path
- Professional install
- Retail price
- Installed quote only
- Available retailers
- not published
- Manual links
- AHRI public detail 218471007, Della 048-TPH MODU Series Manual, ENERGY STAR exact row 218471007, Della Optima Pro CloudAir Series Multi-Zone installation manual for 048-TPH-MODU-1D3, Della Optima Pro CloudAir Series Multi-Zone official product page example for 048-TPH-MODU-1D3, Della Optima Pro CloudAir Series Multi-Zone manual technical tables for 048-TPH-MODU-1D3
- Specification sheet
- Della Optima Pro CloudAir Series Multi-Zone manual technical tables for 048-TPH-MODU-1D3
- Last sourced date
- Jul 28, 2026
Compatible indoor units
This is an outdoor unit. You choose its indoor heads separately - up to the maximum this condenser supports - and you can mix room sizes and styles across the zones. The models below are the heads this unit is documented to pair with.
Wall-mounted air handlers
6k, 9k, 12k, 18k
Model numbers
- 6k: 048-TPH-6K2V-C-IN
- 9k: 048-TPH-9K2V-C-IN
- 12k: 048-TPH-12K2V-C-IN
- 18k: 048-TPH-18K2V-C-IN
Sizing note: do not just add up the rooms. Multi-zone condensers have a maximum total connected capacity, and connecting more head capacity than the unit is rated for is a common installer mistake that hurts efficiency and comfort. Match total head capacity to the condenser's rating.
Installation considerations
ShowHide
- Liquid line
- 1/4 in per zone[2]
- Suction line
- 3/8 in per zone; adapters for larger indoor units when required[2]
- Line connection type
- Flared line connections[2]
- Precharged length
- 25 ft[2]
- Included line-set length
- Depends on the indoor units you choose
- Maximum line-set length
- 197 ft[2]
- Max line set per indoor
- 98 ft[2]
- Max height between indoor units
- not published
- Indoor dimensions
- Depends on the indoor units you choose
- Outdoor dimensions
- 38.50 x 16.57 x 31.61 in[2]
- Indoor weight
- Depends on the indoor units you choose
- Outdoor weight
- 119 lb[2]
- Drain size
- not published
Related systems and guides
- More Della systems
- Senville AURA Multizone 18k R-454B 208/230V 3-Zone Mini-Split
- Mitsubishi M-Series FX Deluxe 24k HZ R-454B 208/230V Mini-Split
- Della Vita 18k R-32 208/230V 2-Zone Mini-Split
- Della Econo 23k 17S R-32 208/230V Mini-Split
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- Do mini splits work in cold weather?
- Della mini split review: is Della any good?
- The best multi-zone mini splits of 2026
- The best 3-zone mini splits of 2026
- How to size a multi-zone mini split
- Not every multi-zone condenser lets you mix head types
- How much does a multi-zone mini split cost?
- The best cold-climate mini splits of 2026
- The best mini splits for heating of 2026
- Mini split heating capacity in the cold: what your unit actually delivers at 5F
- One room won't heat or cool on a multi-zone mini split
- Mini split not heating
- Mini split indoor unit freezing up
- Mini split weak airflow
- Mini split remote not working
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Della Optima Pro CloudAir Series Multi-Zone 3-Zone 20,000 BTU R-454B 208/230V (048-TPH-MODU-1D3) myself, or do I need a pro?
- Della Optima Pro CloudAir Series Multi-Zone 3-Zone 20,000 BTU R-454B 208/230V (048-TPH-MODU-1D3) is built for professional installation: the line set must be flared, evacuated, and charged, which requires EPA-certified refrigerant handling. Installing it outside the manufacturer's requirements can void the warranty, so budget for a qualified HVAC installer.
- Will the Della Optima Pro CloudAir Series Multi-Zone 3-Zone 20,000 BTU R-454B 208/230V (048-TPH-MODU-1D3) keep heating in a cold winter?
- The AHRI/ENERGY STAR certification lists 19,800 BTU/h of heating capacity at 5F. Rated heating operation extends down to -22 F. Certified heating efficiency is 10 HSPF2. Match those numbers against your climate's design temperature - in cold regions, output at 5F matters far more than the nameplate capacity measured at 47F.
- What electrical circuit does the Della Optima Pro CloudAir Series Multi-Zone 3-Zone 20,000 BTU R-454B 208/230V (048-TPH-MODU-1D3) need?
- Published electrical requirements: 230 V voltage, 18 A minimum circuit ampacity, and 30 A maximum breaker or fuse sizing. Confirm the final circuit against the unit nameplate and local code with a licensed electrician.
- How far can the outdoor unit be from the indoor head?
- The published maximum line-set length from the outdoor unit to one indoor head is 98 ft. The combined piping limit across all heads is 197 ft. The outdoor unit's factory charge covers up to 25 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
Data sources
ShowHide
- Della: Della Optima Pro CloudAir Series Multi-Zone official product-page evidence for 048-TPH-MODU-1D3Sourced - manufacturer product page
Covers brand.dealer_installation_policy, Minimum outdoor heating temperature, Maximum outdoor temperature, product_line.name, Warranty notes
- Della: Della Optima Pro CloudAir Series Multi-Zone official manual technical table for 048-TPH-MODU-1D5Sourced - manufacturer technical document
Covers Frequency, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase, Manufacturer wire notes and more
- AHRI certificate #218471007 - search the AHRI DirectorySourced - AHRI directory
Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity and more
- ENERGY STAR record for AHRI #218471007 - search ENERGY STARSourced - Energy Star listing
Covers performance_spec.energy_star_cold_climate, Energy Star status
- Della 048-TPH MODU Series ManualSourced - manual
Covers Manual links
Last updated
Jul 28, 2026