Installing a hydronic radiant floor heating system in an existing home is a big project, but it’s possible to do at least some of it yourself. It depends on your level of comfort running pipes and tubes, plus tearing up and re-installing flooring. You’ll also need to install a boiler system, which most likely requires the help of a professional. While installing a hydronic system yourself is possible, it’s not recommended unless you’re certain you can handle the massive project.
Electric systems are a little easier to DIY, as long as you have the skills to install electric components safely. It’s still a big job though, as there’s no alternative to ripping up the floor.