It is definitely a permit job. Others have said, I’ll second, contact RISE. We did this 4 years ago and we’re able to finance at 0%. We also got a rebate on our boiler. We are steam so the rebate was smaller, but we picked a boiler off their approved list so we got like $2,500 back. RISE also did a ton of insulation work on the new system. The switch all in cost us ~10k. We had our oil company do the install since they know boilers and steam really well.