Tankless water heaters – pros and cons? December 30, 2024 at 11:04 am #42307 Tory JonKeymaster Joined: Nov 2019 Posts: 344 Likes: 390LikeUp1::I’m a fan, but I understand why some people would prefer a tank. Pro – endless hot water. Cons – takes about 20 seconds to warm up and it requires decent water pressure to even work.