Panasonic Etherea Z vs Toshiba Seiya
A side-by-side look at the Panasonic Etherea Z and Toshiba Seiya. Winning figures are highlighted.
| Panasonic Panasonic Etherea Z | Toshiba Toshiba Seiya | |
|---|---|---|
| Price from | n/a | n/a |
| Cooling capacity | 3.5 kW | 3.3 kW |
| Heating capacity | 4.5 kW | 3.6 kW |
| Efficiency (SEER) | 8.5 | 7 |
| Efficiency (SCOP) | 5.1 | 4.6 |
| Indoor noise | 19 dB | 19 dB |
| Outdoor noise | 48 dB | 47 dB |
| Refrigerant | R32 | R32 |
| Wi-Fi control | Yes | No |
| Warranty | 5 yrs | 5 yrs |
Best value per row highlighted. Prices last checked 15 October 2026.
Panasonic Etherea Z
The Etherea Z is Panasonic's premium wall split, pairing A+++ ratings in both modes with the nanoe X air purifier that runs even when you are not cooling. Its high SCOP makes it a strong air-to-air heat pump, comfortably heating a room through a UK winter at low cost. A refined, quiet and well-rounded alternative to the Daikin Perfera.
Full Panasonic Etherea Z reviewToshiba Seiya
The Seiya is Toshiba's budget wall unit and the cheapest way into a quality Japanese-engineered split. Despite the entry-level billing its SCOP of 4.6 is respectable, so it works well as an affordable air-to-air heat pump for a single room. You trade away built-in Wi-Fi (an optional adapter is needed) and top-end cooling efficiency, but for the money it is hard to fault.
Full Toshiba Seiya review