Tsarin zafin jiki mai daidaitawa na thermostatic mai hankali, ingantaccen zafin jiki yana rage lalacewa ga allon kewayawa.
Babban dumama yumbu, shigo da kayan nickel gami dumama waya yumbu kwarangwal tare da halaye na babban zafin jiki juriya da sauri dumama da tsawon rai.
Babban wutar lantarki, isasshiyar wutar lantarki mai ci gaba da aiki, saurin dumama.