How long to heat?

[ferris]

I am wordering if there is a rough calculation to work out how long my tank will take to heat?

I have a Valiant 28kw boiler mounted feet away from a 300ltr solar Megaflow tank, Megaflow say that 125ltrs is the solar portion (which I am yet to hook up), and the balance of 175ltrs is heated by the boiler. My question is how long will it take to heat up fully in the morning - if cold?

Mark

 

[DeltaT2]

What's the recovery rate of your cylinder?

Time taken in minutes to heat water;

Litres x Temperature rise C
--------------------------------
KW Load x 14.3

But the above formula is for 100% efficiency