How can a commercial oven save energy?

Please verify the following points and require itemized written supplier responses:（commercial oven oven-energy-saving） Plan batches, reduce door opening, maintain seals, use correct temperatures and avoid long idle heating. Repair slow heating and heat loss promptly to avoid wasted energy. Define capacity, accuracy, materials and operating environment before requesting quotes on a uniform basis. Request specification sheets, test reports, certificates, maintenance manuals and spare-part lists. During acceptance, verify appearance, dimensions, functions, safety protection and packaging, and keep test records. Do not compare unit price alone; include customization, freight, spare parts, after-sales support and downtime risk. Keep written records of inquiries, confirmations, FAT, acceptance and warranty commitments.