How to build a hot tub heated by wood Justi | July 3, 2017 | General, Off Grid Living and Homesteading | No Comments Not much material needed to build this outdoor hot tub heated by wood. What, a galvanized feeding trough, a little concrete, a good length of copper tubing, and wood. Well, a few more things than that but those are the biggies. This is going to feel great! source: www.homesteadnotes.com Add a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment:*Name:* Email Address:* Website: Notify me of follow-up comments by email. Notify me of new posts by email.