10 Della mini-splits ranked. Each one is scored and ranked against every brand in its size, so "#3 mid-size" means third of all mid-size mini-splits here, not third among Della's own.
Della makes 10 current mini-splits: 3 9,000 BTU, 3 12,000 BTU, 2 18,000 BTU and 2 24,000 BTU. Prices run from $879.96 for the Della Optima CloudAir 9,000 BTU 230V to $2,249.96 for the Della Optima Pro CloudAir 24,000 BTU 230V. Its best-rated model in each size: the Della Optima Pro CloudAir 9,000 BTU 230V (#1 of 11 9,000 BTU, rated 4.5), the Della Optima Pro CloudAir 12,000 BTU 230V (#1 of 13 12,000 BTU, rated 4.5), the Della Optima Pro CloudAir 18,000 BTU 230V (#1 of 10 18,000 BTU, rated 4.3) and the Della Optima Pro CloudAir 24,000 BTU 230V (#1 of 9 24,000 BTU, rated 4.1). Sizes run from 9,000 to 24,000 BTU. All use flared line sets, which need a vacuum pump. 10 of them are on the ENERGY STAR Cold Climate list.
The best value for heating through a cold winter, if you can pull a vacuum yourself or pay someone to. It holds its full rated heat at 5 °F for far less than a quick-connect unit that does the same.
Amazon $1,249.96 Della $1,249.96Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
The best value for heating through a cold winter, if you can pull a vacuum yourself or pay someone to. It holds its full rated heat at 5 °F for far less than a quick-connect unit that does the same.
Amazon $1,249.96 Della $1,249.96The best value for heating through a cold winter, if you can pull a vacuum yourself or pay someone to. It holds its full rated heat at 5 °F for far less than a quick-connect unit that does the same.
Amazon $1,049.96 Della $1,049.96The best value for heating through a cold winter, if you can pull a vacuum yourself or pay someone to. It holds its full rated heat at 5 °F for far less than a quick-connect unit that does the same.
Amazon $1,849.96 Della $1,849.96The best value for heating through a cold winter, if you can pull a vacuum yourself or pay someone to. It holds its full rated heat at 5 °F for far less than a quick-connect unit that does the same.
Amazon $2,249.96 Della $2,249.96The cheapest way into a certified, cold-capable heat pump, for a self-installer with a vacuum pump. Pioneer’s Quantum Ultra and the quick-connect Klimaire DIY have near-identical certified ratings.
Amazon $949.96 Della $949.96The cheapest way into a certified, cold-capable heat pump, for a self-installer with a vacuum pump. Pioneer’s Quantum Ultra and the quick-connect Klimaire DIY have near-identical certified ratings.
Amazon $969.96 Della $969.96The cheapest way into a certified, cold-capable heat pump, for a self-installer with a vacuum pump. Pioneer’s Quantum Ultra and the quick-connect Klimaire DIY have near-identical certified ratings.
Amazon $1,319.96 Della $1,499.96The cheapest way into a certified, cold-capable heat pump, for a self-installer with a vacuum pump. Pioneer’s Quantum Ultra and the quick-connect Klimaire DIY have near-identical certified ratings.
Amazon $879.96 Della $879.96The cheapest way into a certified, cold-capable heat pump, for a self-installer with a vacuum pump. Pioneer’s Quantum Ultra and the quick-connect Klimaire DIY have near-identical certified ratings.
Amazon $899.96 Della $899.96The cheapest way into a certified, cold-capable heat pump, for a self-installer with a vacuum pump. Pioneer’s Quantum Ultra and the quick-connect Klimaire DIY have near-identical certified ratings.
Amazon $1,849.96 Della $1,849.96
