Hot-narkewa mai zafisuna da matukar damuwa ga canje-canje a yanayin zafin jiki, kuma samfuran da aka haɗasu tare da manne mai narkewa mai ƙonawa dole ne a tsara su tare da wannan mahimmancin.Haɗa mai narkewa mai ƙwanƙwasa mai ƙarfi na iya tsayayya da gwajin yanayi huɗu, musamman a lokacin sanyi da bazara. Don haka a cikin aikin samar da narkewa mai zafi, waɗanne kaddarorin ne lokacin zai shafa?
Samfurin mai narkewa mai zafi yana da kyakkyawan sanda da sassauci a lokacin bazara, amma mannewa da ƙoshin lafiya a lokacin hunturu; samfura a cikin hunturu zasu bayyana cikin rudani ko ruwan wanka, zanen waya da manne sun cika a lokacin rani. Samfurin mai ɗumi mai zafi yana da ƙarancin yanayin yanayi, wanda ke sa samfurin ya zama matsala ga lokacin da yanayin ya canza.
Wannan shine ƙirar samfurin ba tare da yin la'akari da tasirin hunturu da bazara akan manne narke mai zafi ba. Misali: lokacin warkewar abin narkarda mai narkewa mai zafi (wanda akafi sani da lokacin buɗewa) shine mahimmin mahimmanci wanda ke shafar ƙarancin manna narkewar zafi. Tunda yatsan da aka narkar da abin gogewa a zahiri a yanayin zafin daki, banbancin yanayin zafi na daki tsakanin hunturu da bazara babba ne. A wannan lokacin, lokacin warkewar narkar mai zafi daban-daban. Ya kamata a taqaita lokacin maganin iri iri a lokacin bazara, kuma ya kamata a tsawaita lokacin warkarwa zuwa hunturu. Ta wannan hanya ne kawai ma'aikata za su iya kammala aikin haɗin kan kafin manna mai narkewa mai ƙarfi ya ƙarfafa a cikin yanayi daban-daban.
Yayin daidaita lokacin warkewar abin narkar da zafin, ya zama dole a kara wasu kayan kwalliya don canza dan karamin narkeken madogarar, ta yadda manne mai zafi zai iya yin aiki da kyau a yanayin yanayin yanayi daban-daban kuma ya tabbatar da juriya na yanayin narkewar narkar da zafin.