In temperate climates, such as in Europe and South Africa, catfish are held indoors inside a greenhouse tunnel or warehouse, and the temperature maintained by means of electric heat pumps or boilers.
Zwi tshi da kha mutsho, une wa nga wa Europe na Afrika Tshipembe, dzi vha dzi tshi khou fuwelwa nga ngomu kha greenhouse kana dzi warehouse na hone mufhiso uya kona u langea nga dzi pump dza mudagasi kana zwa u tou vhilisa.