Hi Jane. Thank you for reaching out to SumZero Energy and considering us for your project. At this time, our team does not provide boiler services or prepare written estimates for this type of work. For the scope you’ve outlined, we recommend connecting with a licensed plumbing/heating contractor who specializes in boilers. They’ll be able to provide the comprehensive estimate and documentation you’re requesting. We appreciate you thinking of us, and we wish you the best in finding the right professional to help resolve the issue.