I have an Eclassic 2300 and a Peerless oil boiler. I have an 80 gallon Superstor storage tank because I have a large demand for hot water (old farm house with 2 apts. in house plus my living space) My present system is and has worked fine - but I have read that some people have 500 - 1000 gallons of storage - Can someone explain the advantage of having that much storage ???????