Della / Umbra Series
Della Umbra 12k VR 20S R-32 115V Mini-Split
The Umbra 12k VR 20s on 115V is a variant of the efficient 1-ton Umbra on a household circuit. It rates SEER2 20, EER2 10, and HSPF2 8.5, heating 12,300 BTU/h at 47F but only 2,400 BTU/h at 5F. It is a mild-climate cooling pick that plugs into a standard outlet.
Refrigerant generation
R-32 - current-generation refrigerant
Paid link
$850 / Fresh price - checked Jul 24, 2026
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Image: Della
- Last sourced
- Jul 24, 2026
SplitAtlas score
7.5 / 10
(20.0 SEER2) among 12k systems
(8.5 HSPF2) among 12k systems
(19.5% heat retained at 5F; 19 F heating floor) among 12k systems
(23 dBA indoor min / 53 dBA outdoor) among 12k systems
(DIY-marketed; 25 ft precharged; 13 ft included line set) across the catalogue
(3 verified features) across the catalogue
($850 median retail) among 12k 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: 115V; breaker/fuse 20 A.
- Line set: Flared line connections; precharged 25 ft; included 13 ft; max 65.6 ft.
Alternatives
- Daikin ATMOSPHERA 12,000 BTU R-32 208/230V (FTXM12WVJU9 / RXM12WVJU9)
9.0 score / 12k / SEER2 25.2 / -13 F heating floor / 208/230V
Exact destination at HVACDirect: $2,848.00, checked Jul 23, 2026
- Blueridge XS6 Max Efficiency 12,000 BTU R-454B 208/230V (BXS6A12WM0 / BXS6A12UC0)
8.9 score / 12k / SEER2 29.4 / -22 F heating floor / 230V
Exact destination at Alpine Home Air: $1,979.00, checked Jul 24, 2026
- Senville ELITE 12,000 BTU R-454B 208/230V (SENE-12EL-IHH / SENE-12EL-OH)
8.9 score / 12k / SEER2 29.4 / -22 F heating floor / 187-253V
Exact destination at Senville: $1,699.99, checked Jul 24, 2026
Availability and price context
- Verified current price: $849.96 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
Model context
- Structured ratings
- Certification: ENERGY STAR certified. Refrigerant: current low-GWP R-32. Minimum heating ambient: 19 F.
Strengths
- SEER2 20 keeps cooling efficient for the class.
- Standard 115V circuit simplifies retrofits.
Weaknesses
- Heating tapers hard to 2,400 BTU/h at 5F, so it will not carry a room through a freeze.
- Not ENERGY STAR certified, which limits access to efficiency rebates.
Climate suitability
- Minimum heating ambient
- 19 F[1]
- Rated heating at 5F
- 2,400 BTU/h[3]
- Rated heating at 17F
- 6,700 BTU/h[3]
- Rated heating at 47F
- 12,300 BTU/h[3]
Specifications
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- Manufacturer
- Della
- Brand
- Della
- Product line
- Umbra Series
- Model number
- 048-MS-12K1VR-20S-JPB-IN indoor / 048-MS-12K1VR-20S-OUT outdoor
- Indoor unit model
- 048-MS-12K1VR-20S-JPB-IN
- Outdoor unit model
- 048-MS-12K1VR-20S-OUT
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 12,000 BTU/h[3]
- Rated heating capacity
- 12,300 BTU/h[3]
- Voltage
- 115 V[1]
- MCA
- not published - manufacturer specifies 20 A breaker
- Maximum fuse or breaker size
- 20 A[1]
- Breaker needed
- 20 A[1]
- SEER2
- 20 SEER2[3]
- EER2
- 10 EER2[3]
- HSPF2 (Region 4)
- 8.5 HSPF2[3]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2.08 COP[3]
- Minimum outdoor heating temperature
- 19 F[1]
- Minimum outdoor cooling temperature
- not published
- Maximum outdoor temperature
- 118 F[1]
- Indoor noise range
- 23 - 41 dBA[2]
- Outdoor noise rating
- 53 dBA[2]
- Indoor weight
- 19.4 lb[1]
- Outdoor weight
- 52.9 lb[1]
- Refrigerant
- R-32[3]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 3/8 in suction
- Included line-set length
- 13 ft[1]
- Maximum line-set length
- 65.6 ft[2]
- Max line set per indoor
- not published
- Maximum elevation difference
- 49.21 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
- 211001971[3]
- Warranty
- not published
- Install path
- Professional install / DIY-marketed
- Marketing install label
- DIY-marketed
- Retail price
- $849.96
- Available retailers
- Della
- Manual links
- AHRI Appendix M1 public detail record 211001971, Umbra Series installation and operation guide, Umbra 12,000 BTU Della product-page specifications
- Specification sheet
- Umbra 12,000 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
$850 / Fresh price - checked Jul 24, 2026
Electrical requirements
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- Voltage
- 115 V[1]
- Voltage range
- 115V[1]
- Phase
- 1[1]
- Frequency
- not published
- MCA
- not published - manufacturer specifies 20 A breaker
- Breaker needed
- 20 A[1]
- Maximum breaker size
- not published
- Maximum fuse size
- 20 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
- 3/8 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
- 65.6 ft[2]
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 31.18 in W x 11.5 in H x 7.91 in D[1]
- Outdoor dimensions
- 27.76 in W x 20.87 in H x 10.98 in D[1]
- Indoor weight
- 19.4 lb[1]
- Outdoor weight
- 52.9 lb[1]
- Drain size
- not published
Related systems and guides
- More Della systems
- Della Serena CloudAir Series 12k 230V
- Umbra Series 12k
- Della sibling model
- Della 230 V option
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- Della mini split review: is Della any good?
- The best 12,000 BTU mini splits of 2026
- The best DIY mini splits of 2026
- What "DIY mini split" actually means
- How to install a mini split (DIY overview)
- R-32 vs R-454B: the mini split refrigerant change explained
- Mini split for a hot upstairs
- Mini splits for an ADU or tiny home
- Mini split brands to avoid: how to spot a bad one
- Mini split remote not working
- Mini split Wi-Fi not connecting
- Your mini split is showing a refrigerant leak code
- Mini split leaking water
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Della Umbra 12,000 BTU R-32 115V (048-MS-12K1VR-20S-JPB-IN / 048-MS-12K1VR-20S-OUT) myself, or do I need a pro?
- Della Umbra 12,000 BTU R-32 115V (048-MS-12K1VR-20S-JPB-IN / 048-MS-12K1VR-20S-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 12,000 BTU R-32 115V (048-MS-12K1VR-20S-JPB-IN / 048-MS-12K1VR-20S-OUT) keep heating in a cold winter?
- The manufacturer publishes 2,400 BTU/h of heating output at 5F. Rated heating operation extends down to 19 F. Certified heating efficiency is 8.5 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 Umbra 12,000 BTU R-32 115V (048-MS-12K1VR-20S-JPB-IN / 048-MS-12K1VR-20S-OUT) need?
- Published electrical requirements: 115 V voltage, not published - manufacturer specifies 20 A breaker minimum circuit ampacity, and 20 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 65.6 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 12000 BTU 20 SEER2 Mini Split Heat Pump AC - Up to 550 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 #211001971 - 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