assessment ?

Read the most recent financial statements along with monthly/quarterly board updates to see if there are reserves on the balance sheet and potential costs.

Refi is unlikely to. Boiler depending on the size of the building could be $25-100K. You can ask the managing agent about the cost estimate, how it is going to be funded and your % shares in the coop. Most coop will need to assess for a large expense. Otherwise, it is dipping into their cash reserves.

they are planning to get a loan and pay for the boiler that way, they don't have enough money on the reserve. Would this potentially increase the maintenance?