Is it worthwhile to use a gasifier to warm a greenhouse?

Hi Garry,
I presume there’s a site we can search for the patents. Will you post it, if you have it? Thank you.
Pepe

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https://www.google.com/patents/US3090731

https://www.google.com/patents/US3140987

https://www.google.com/patents/US4476789

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