Hot water tank

Maryland
I just leased a building and found out it does not have a hot water tank. Am I responsible to buy it or should the landlord purchase it?

Depends. Is this a commercial building? Commercial leases usually make the tenant responsible to add whatever equipment he requires to the building to suit his own purposes. Previously the building may have been for offices or just for storage of records and a hot water tank was not needed. So you may have to install one yourself if you want it. Check with the LL and see if he will pay for it. Or if not, see if he authorizes you to install one.

If this is a residential building, the LL is responsible since most state residential LL-Tenant laws say he is responsible to provide the means for reasonable amounts of hot water.