Della / Optima Pro CloudAir Series Multi-Zone
Della Optima Pro CloudAir 27k R-454B 208/230V 4-Zone Mini-Split
The Della Optima Pro CloudAir 4-Zone 27k adds a fourth head to the premium, smart-enabled Optima line on one 208/230V outdoor unit. It posts a nominal SEER2 of 26.5, EER2 14, HSPF2 10.5, on current low-GWP R-454B refrigerant, and is ENERGY STAR certified and AHRI cold-climate designated.
Its rated heating rises in the cold, from 27,000 BTU at 47F to 28,000 at 17F, then holds 26,000 at 5F. Professional installation required; dealer-quoted.
Refrigerant generation
R-454B - current-generation refrigerant
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- Last sourced
- Jul 28, 2026
SplitAtlas score
9.3 / 10
(26.5 SEER2) among 24k systems
(10.5 HSPF2) among 24k systems
(96.3% heat retained at 5F; -22 F heating floor) among 24k 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.
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Key ratings
Buyer review snapshot
Best for / skip if
Best for
- 4-zone projects in the 24k outdoor capacity class.
- Top efficiency shortlists; SEER2 is 26.5.
Install difficulty
- Electrical: 230V; MCA 22 A; breaker/fuse 35 A.
- Line set: Flared line connections; precharged 25 ft; max 262 ft.
- 4-zone condenser; indoor-head matching and branch layout are part of the job.
Availability and price context
We could not verify a current retail price for this model. We could not find this exact model in stock at a retailer we work with when we last checked on 2026-07-28.
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
Warranty: Della warranty terms vary by registration and installation context; product pages expose Warranty Registration / Warranty Policy links.
Model context
- Install path
- This is professional-install equipment; no verified current retail offer is attached.
- 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
- Four zones with high nominal SEER2 26.5 / EER2 14 / HSPF2 10.5.
- Rated heating rises to 28,000 BTU at 17F, above its 47F rating.
- Smart-enabled premium line on current low-GWP R-454B.
Weaknesses
- Priced above the standard Optima line.
- 27,000 BTU across four zones is modest per room; size each head.
Climate suitability
- Minimum heating ambient
- -22 F[1]
- Rated heating at 5F
- 26,000 BTU/hNon-Ducted Indoor Units[3]
- Rated heating at 17F
- 28,000 BTU/hNon-Ducted Indoor Units[3]
- Rated heating at 47F
- 27,000 BTU/hNon-Ducted Indoor Units[3]
Specifications
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- Manufacturer
- Della
- Brand
- Della
- Product line
- Optima Pro CloudAir Series Multi-Zone
- Model number
- 048-TPH-MODU-1D4
- Indoor unit model
- Indoor heads are selected separately on a multi-zone system
- Outdoor unit model
- 048-TPH-MODU-1D4
- Number of zones
- 4
- Max indoor units
- 4 units[2]
- Rated cooling capacity
- 27,000 BTU/hNon-Ducted Indoor Units[3]
- Rated heating capacity
- 27,000 BTU/hNon-Ducted Indoor Units[3]
- Voltage
- 230 V[2]
- MCA
- 22 A[2]
- Maximum fuse or breaker size
- 35 A[2]
- Breaker needed
- not published
- SEER2
- 26.5 SEER2Non-Ducted Indoor Units[3]
- EER2
- 14 EER2Non-Ducted Indoor Units[3]
- HSPF2 (Region 4)
- 10.5 HSPF2Non-Ducted Indoor Units[3]
- HSPF2 (Region 5)
- Certified per indoor-unit combination, not per outdoor unit
- 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
- Indoor heads are selected separately on a multi-zone system
- Outdoor noise rating
- 65 dBA[2]
- Indoor weight
- Indoor heads are selected separately on a multi-zone system
- Outdoor weight
- 145.5 lb[2]
- Refrigerant
- R-454B[3]
- Refrigerant charge
- 98.8 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
- Indoor heads are selected separately on a multi-zone system
- Maximum line-set length
- 262 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
- Indoor heads are selected separately on a multi-zone system
- Energy Star status
- ENERGY STAR certified[4]
- AHRI certification number
- 218471008Non-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
- We could not find this exact model in stock at a retailer we work with when we last checked on 2026-07-28.
- Available retailers
- not published
- Manual links
- AHRI public detail 218471008, Della 048-TPH MODU Series Manual, ENERGY STAR exact row 218471008, Della Optima Pro CloudAir Series Multi-Zone installation manual for 048-TPH-MODU-1D4, Della Optima Pro CloudAir Series Multi-Zone official product page example for 048-TPH-MODU-1D4, HVACDirect exact-offer audit for 048-TPH-MODU-1D4, Della Optima Pro CloudAir Series Multi-Zone manual technical tables for 048-TPH-MODU-1D4
- Specification sheet
- Della Optima Pro CloudAir Series Multi-Zone manual technical tables for 048-TPH-MODU-1D4
- 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, 24k
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
- 24k: 048-TPH-24K2V-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
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- 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
- Indoor heads are selected separately on a multi-zone system
- Maximum line-set length
- 262 ft[2]
- Max line set per indoor
- 98 ft[2]
- Max height between indoor units
- not published
- Indoor dimensions
- Indoor heads are selected separately on a multi-zone system
- Outdoor dimensions
- 42.28 x 18.43 x 33.58 in[2]
- Indoor weight
- Indoor heads are selected separately on a multi-zone system
- Outdoor weight
- 145.5 lb[2]
- Drain size
- not published
Related systems and guides
- More Della systems
- Hyper Multi-Zone 27k
- Della 230 V option
- Vario Series 24k
- Hyper Heat Multi-Zone 27k
- 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 4-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 condensate pump problems
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Della Optima Pro CloudAir Series Multi-Zone 4-Zone 27,000 BTU R-454B 208/230V (048-TPH-MODU-1D4) myself, or do I need a pro?
- Della Optima Pro CloudAir Series Multi-Zone 4-Zone 27,000 BTU R-454B 208/230V (048-TPH-MODU-1D4) 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 4-Zone 27,000 BTU R-454B 208/230V (048-TPH-MODU-1D4) keep heating in a cold winter?
- The manufacturer publishes 26,000 BTU/h of heating output at 5F. Rated heating operation extends down to -22 F. Certified heating efficiency is 10.5 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 4-Zone 27,000 BTU R-454B 208/230V (048-TPH-MODU-1D4) need?
- Published electrical requirements: 230 V voltage, 22 A minimum circuit ampacity, and 35 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 is 262 ft, and the included line set comes pre-charged for 25 ft. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
Data sources
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- Della: Della Optima Pro CloudAir Series Multi-Zone official product-page evidence for 048-TPH-MODU-1D4Sourced - 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 #218471008 - 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 #218471008 - 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