Hi, my cold water pressure works fine, but my hot water drizzels. My water is stored in a water tank. I cleaned out the filter where the water runs into the house and it did not help. I have a hot water on demand heater. How do I see if this is a clog or something else? Thanks in advance

Do you have poor hot water at all of your faucets or just one? Where do you live by the way? Just might check the service valves on the inlet and outlet of the tankless heater to make sure noboby has closed one of them.

All of my faucets. Also, there is a lot of air in the line and the hot water doesn't always turn on. Thought this might be because of the pressure. Oh, and I live in Panama (Central America). Ya, this might be my first problem, Ha Ha. Thanks for your help.

If its all your hot water faucets then suspect the heater and its valves. Your one demand heater should have a disconnect on the inlet and outlet line so try disconnecting at the outlet line to see if there is hot water pressure coming out of the tank. Shut your main down while you disconnect so you don't get burned. Come back and tell us if you did or did not have pressure coming from the tank. In the meantime remove all aerators from all faucets, if they aren't plugged yet they soon will be.