Hello Carole. This is Richard at GE Appliances. Thanks for the interest in our range! The lower oven can be used as a regular oven as well as a convection oven on the CGS990SETSS.

Hi-this is Sue from GE Appliances. It's exciting to hear of your interest in our restaurant-inspired GE Cafe Series! The exterior of the range and the deep recessed cooktop is stainless steel. The knobs are die cast metal. Thanks for checking with us!

Hello Bud - this is Nancy at GE and I am happy to help you. This is a beautiful Cafe' 30" gas double oven convection range. Yes, it can be converted to propane, The LP conversion kit is included and the conversion must be performed by a qualified LP gas installer. I hope this helps! Thanks for checking with us!

Hi - We are excited to hear of your interest in our restaurant inspired GE Cafe Series! While stainless steel is not scratch-proof, our stainless steel finish is quite durable and holds up well. To clean the stainless steel surface, use warm sudsy water, stainless steel cleaner or polish or Bar Keepers Friend Soft Cleanser™. Follow the cleaner instructions. We recommend Cerama Bryte® stainless steel appliance cleaner (PM10X311). Purchase locally or online at GEApplianceParts.com. The Owner's Manual is also a good source for general cleaning recommendations for the various parts of your range: http://products.geappliances.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=49-85234.pdf - Explore our GE Cafe Series: http://www.geappliances.com/ge/cafe.htm - Keep in touch! SUEatGEA

Hi Deb- Thanks for viewing our GE Café Series! The range is not available without the cooktop. We suggest to view our GE Café™ Series 30" Built-In Double Convection Wall Oven CT9570SLSS, GE Café™ Series 30" Built-In Double Convection Wall Oven CT9550SHSS and GE Café™ Series 30 in. Combination Double Wall Oven with Convection and Advantium® Technology CT9800SHSS. Explore our RESTAURANT-INSPIRED GE CAFE SERIES: http://www.geappliances.com/ge/cafe.htm - Keep in touch! SUEatGEA

Hi venting- This is Sue at GE Appliances. We are excited to hear of your interest in our Cafe Series! This range is not equipped with a vent system. While a vent hood is not required by GE, it is recommended. Vents help to effectively remove smoke, grease, odors and moisture from the room. We suggest to check local codes for any venting requirements. Check out our GE CAFÉ™ SERIES 30" DESIGNER HOOD CV936MSS. Thanks for checking with us!