I wasn't exactly sure which section to post this in so I apologize if this is not in the right spot. I was thinking of looking into a way to force air and heat into my hot tub to make it an actual functioning hot tub. It has never had either and I have no idea what it would take to do so. I used to have a separate 1hp pump dedicated to it for cleaning but it died so I ripped it out. I currently divert water flow partially to the hot tub so it at least has water moving around and not stagnant that is why there are 2 unused pipes in the attached picture. I was thinking if it was at all possible to make it happen for around $1k then it would be worth it to me. If someone could shed some light on how this is accomplished that would be most helpful.