You can calculate the minimum CFM required to vent your stove top and oven based on BTUs and room size. Your CFM calculation will also inform duct size and make up air requirements. Lots of sites do this but here's one.
You can vent both the gas oven and the stove separately. You have to buy high end appliances for that. I've seen them but can't remember.. maybe a Viking stove or something prosumer-commercial. Make up air can be a cracked window or a separate intake duct that opens up when the vent is turned on. Your local building code will have specific requirements.
You can duct a hood out of an external wall or even better out of the roof. If you go with a roof vent you can install the extractor fans in the duct in the attic which helps reduce noise if that's a concern. What you can do will depend on your specific kitchen.
I have found that the stove top is worse than the oven for emissions. The reason is that my exhaust hood is under-powered and it's a microwave/exhaust combination that doesn't extend over the entire cooking surface. So I would advise a hood larger than the stove top itself, install a larger duct and I would overestimate the CFMs required. If you get a multi-speed range hood then you can adjust it as necessary.
I actually think electric ovens are better combined with a gas stove top. Electric ovens though do have a tendency to fail at inopportune times (e.g. the holidays!)
https://www.prolinerangehoods.com/blog/cfm-need-range-hood/
You can vent both the gas oven and the stove separately. You have to buy high end appliances for that. I've seen them but can't remember.. maybe a Viking stove or something prosumer-commercial. Make up air can be a cracked window or a separate intake duct that opens up when the vent is turned on. Your local building code will have specific requirements.
You can duct a hood out of an external wall or even better out of the roof. If you go with a roof vent you can install the extractor fans in the duct in the attic which helps reduce noise if that's a concern. What you can do will depend on your specific kitchen.
I have found that the stove top is worse than the oven for emissions. The reason is that my exhaust hood is under-powered and it's a microwave/exhaust combination that doesn't extend over the entire cooking surface. So I would advise a hood larger than the stove top itself, install a larger duct and I would overestimate the CFMs required. If you get a multi-speed range hood then you can adjust it as necessary.
I actually think electric ovens are better combined with a gas stove top. Electric ovens though do have a tendency to fail at inopportune times (e.g. the holidays!)