I have a oil fired Weil Mclain boiler that does our baseboard heat and heats our hotwater. My current Aquabooster is old and will need replacing soon. I was in need of which system is more efficient- an Aquabooster tank or a tankless setup through my boiler that is on demand. My current Aquabooster is 110VAC plug in type, so I assume the new one would be as well. The prices are ranging right around $1500.00 clams for a new Aquabooster, which is why I am exploring my options. I have a small house with just my wife and I. Thanks in advance.