four lait/viande ?

Bonjour
Nous avons un four à pyrolise (la pyrolise dure 3h et coûte une fortune !).
Je voudrais savoir si je peux utiliser mon four pour un plat halavi, bien nettoyer ensuite et laisser plusieurs jours avant de cuisiner un plat bassari !?!
Perso, je fais une pyrolise pour Pessah.

Si oui, ça me changerait la vie !

kol touv

Rav Moshe Feinstein
Rav Moshe (Igrot Moshe Yoreh Deah 40) indicates that one may cook milk and meat consecutively in one oven if either the milk or meat pots are covered. This is based on the Rama (92:8), who states Zeiah does not constitute a problem if a pot is covered.21 In addition, Rav Moshe (as mentioned previously) rules that one has to be concerned that solid food emits Zeiah only if one is aware that it has done so. Rav Moshe does not mention the option of waiting twenty-four hours between cooking milk and meat; this is an oral report quoted in his name.
Rav Feivel Cohen
Rav Cohen (aforementioned citation in the Badei Hashulchan) as well as the Chelkat Yaakov (2:136) and Minchat Yitzchak (5:20) strongly urge that one acquire two separate ovens for milk and meat. They believe that the use of milk and meat in one oven is so fraught with Halachic problems that a great effort should be expended to avoid these problems. In addition, Rabbi Cohen rules that one should have separate grates for milk and meat for both the oven and stove top. Rav Moshe (aforementioned responsum), on the other hand, wholeheartedly endorses the generally accepted practice to use one set of grates both for milk and meat.22 Rav Moshe notes that on Pesach, the common practice is to be strict and to change grates from Chametz use to Pesach use. This reflects an extra stringency, which is consistent with the very strict nature of the Halachot of Pesach.
Conclusion
We have seen that there are many differing approaches to the question of cooking milk and meat consecutively in one oven. These opinions reflect the many different approaches to the scope of the applicability of the concern for Zeiah. One should seek guidance from a Halachic advisor as to which of these protocols to adopt in practice.