Della / Umbra Series
Della Umbra 18k 17S R-32 208/230V Mini-Split
The Umbra 18k 17s is a 1.5-ton unit tuned for efficient mild-climate cooling. It rates SEER2 19, EER2 10.5, and HSPF2 9, heating 18,700 BTU/h at 47F but tapering sharply to 3,600 BTU/h at 5F. It fits a medium space where hard freezes are rare.
Refrigerant generation
R-32 - current-generation refrigerant
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$1,030 / Fresh price - checked Jul 24, 2026
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Image: Della
- Last sourced
- Jul 24, 2026
SplitAtlas score
7.2 / 10
(19.0 SEER2) among 18k systems
(9.0 HSPF2) among 18k systems
(19.3% heat retained at 5F; 19 F heating floor) among 18k systems
(32 dBA indoor min / 54 dBA outdoor) among 18k systems
(DIY-marketed; 25 ft precharged; 13 ft included line set) across the catalogue
(3 verified features) across the catalogue
($1,030 median retail) among 18k systems
(3 manuals; spec sheet) across the catalogue
Key ratings
Buyer review snapshot
Best for / skip if
Skip if
- Primary cold-climate heat; published heating floor is 19 F.
Install difficulty
- Electrical: 230V; breaker/fuse 15 A.
- Line set: Flared line connections; precharged 25 ft; included 13 ft; max 98.4 ft.
Alternatives
- Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0)
9.0 score / 18k / SEER2 25.6 / -22 F heating floor / 230V
Exact destination at Alpine Home Air: $2,359.00, checked Jul 24, 2026
- Senville ELITE 18,000 BTU R-454B 208/230V (SENE-18EL-IHH / SENE-18EL-OH)
8.9 score / 18k / SEER2 25.6 / -22 F heating floor / 187-253V
Exact destination at Senville: $1,899.99, checked Jul 24, 2026
- ACiQ Standard 18,000 BTU R-454B 208/230V (ACIQ-18WS-HP230C / ACIQ-18ZS-HP230C)
8.8 score / 18k / SEER2 24 / -13 F heating floor / 230V
Exact destination at HVACDirect: $1,299.99, checked Jul 26, 2026
Availability and price context
- Verified current price: $1,029.96 at Della; availability in_stock; checked Jul 24, 2026.
Source date
- Model data sourced
- Jul 24, 2026
- Page reviewed
- Jul 24, 2026
- Source-backed records
- 4
- Newest source retrieved
- Jul 24, 2026
Strengths
- Strong 18,700 BTU/h of heat at 47F for a 1.5-ton room.
- HSPF2 9 is respectable for the mainstream tier, with low-GWP R-32 refrigerant.
- Standard 230V circuit for a permanent install.
Weaknesses
- Output drops to 3,600 BTU/h at 5F, so it cannot anchor a home in deep cold.
- Not ENERGY STAR certified, a drawback for rebate-focused buyers.
Climate suitability
- Minimum heating ambient
- 19 F[1]
- Rated heating at 5F
- 3,600 BTU/h[3]
- Rated heating at 17F
- 11,500 BTU/h[3]
- Rated heating at 47F
- 18,700 BTU/h[3]
Specifications
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- Manufacturer
- Della
- Brand
- Della
- Product line
- Umbra Series
- Model number
- 048-MS-18K2VR-17S-JPB-IN indoor / 048-MS-18K2VR-17S-OUT outdoor
- Indoor unit model
- 048-MS-18K2VR-17S-JPB-IN
- Outdoor unit model
- 048-MS-18K2VR-17S-OUT
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 18,000 BTU/h[3]
- Rated heating capacity
- 18,700 BTU/h[3]
- Voltage
- 230 V[1]
- MCA
- not published - manufacturer specifies 15 A breaker
- Maximum fuse or breaker size
- 15 A[1]
- Breaker needed
- 15 A[1]
- SEER2
- 19 SEER2[3]
- EER2
- 10.5 EER2[3]
- HSPF2 (Region 4)
- 9 HSPF2[3]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2.2 COP[3]
- Minimum outdoor heating temperature
- 19 F[1]
- Minimum outdoor cooling temperature
- not published
- Maximum outdoor temperature
- 118 F[1]
- Indoor noise range
- 32 - 47 dBA[2]
- Outdoor noise rating
- 54 dBA[2]
- Indoor weight
- 26 lb[1]
- Outdoor weight
- 66.1 lb[1]
- Refrigerant
- R-32[3]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 1/2 in suction
- Included line-set length
- 13 ft[1]
- Maximum line-set length
- 98.4 ft[2]
- Max line set per indoor
- not published
- Maximum elevation difference
- 65.6 ft[2]
- Max height between indoor units
- not published
- Wi-Fi support
- not published
- Energy Star status
- Not ENERGY STAR certified[4]
- AHRI certification number
- 211001965[3]
- Warranty
- not published
- Install path
- Professional install / DIY-marketed
- Marketing install label
- DIY-marketed
- Retail price
- $1,029.96
- Available retailers
- Della
- Manual links
- AHRI Appendix M1 public detail record 211001965, Umbra Series installation and operation guide, Umbra 18,000 BTU Della product-page specifications
- Specification sheet
- Umbra 18,000 BTU Della product-page specifications
- Last sourced date
- Jul 24, 2026
Retail purchase context
Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure
Paid link
$1,030 / Fresh price - checked Jul 24, 2026
Electrical requirements
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- Voltage
- 230 V[1]
- Voltage range
- 208/230V[1]
- Phase
- 1[1]
- Frequency
- not published
- MCA
- not published - manufacturer specifies 15 A breaker
- Breaker needed
- 15 A[1]
- Maximum breaker size
- not published
- Maximum fuse size
- 15 A[1]
- Maximum cooling current
- not published
- Maximum heating current
- not published
- Manufacturer wire notes
- not published
Installation considerations
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- Liquid line
- 1/4 in[1]
- Suction line
- 1/2 in[1]
- Line connection type
- Flared line connections[2]
- Precharged length
- 25 ft[2]
- Included line-set length
- 13 ft[1]
- Maximum line-set length
- 98.4 ft[2]
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 37 in W x 12.44 in H x 8.82 in D[1]
- Outdoor dimensions
- 30.9 in W x 21.85 in H x 11.8 in D[1]
- Indoor weight
- 26 lb[1]
- Outdoor weight
- 66.1 lb[1]
- Drain size
- not published
Related systems and guides
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- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Della Umbra 18,000 BTU R-32 208/230V (048-MS-18K2VR-17S-JPB-IN / 048-MS-18K2VR-17S-OUT) myself, or do I need a pro?
- Della Umbra 18,000 BTU R-32 208/230V (048-MS-18K2VR-17S-JPB-IN / 048-MS-18K2VR-17S-OUT) 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 Umbra 18,000 BTU R-32 208/230V (048-MS-18K2VR-17S-JPB-IN / 048-MS-18K2VR-17S-OUT) keep heating in a cold winter?
- The manufacturer publishes 3,600 BTU/h of heating output at 5F. Rated heating operation extends down to 19 F. Certified heating efficiency is 9 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 Umbra 18,000 BTU R-32 208/230V (048-MS-18K2VR-17S-JPB-IN / 048-MS-18K2VR-17S-OUT) need?
- Published electrical requirements: 230 V voltage, not published - manufacturer specifies 15 A breaker minimum circuit ampacity, and 15 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 98.4 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 Umbra Series 18000 BTU 19 SEER2 Mini Split Heat Pump AC - Up to 1000 Sq.Ft. official product pageSourced - manufacturer product page
Covers Breaker needed, Maximum fuse size, Phase, Voltage, Voltage range, Included line-set length and more
- Della: Umbra Series installation and operation guideSourced - manufacturer technical document
Covers Indoor noise range, Line connection type, Maximum elevation difference, Maximum line-set length, Outdoor noise rating, Precharged length
- AHRI certificate #211001965 - search the AHRI DirectorySourced - AHRI directory
Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more
- ENERGY STAR: ENERGY STAR exact row check for AHRI 215864147Sourced - Energy Star listing
Covers Energy Star status
Last updated
Jul 24, 2026