Hi all, first of all thanks to anyone who takes the time to read about this problem, and more thanks to anyone who replies
Trying to give advice to a customer regarding an 'inadequate' central heating design. He has, a Victorian three floor terraced house with toilet on the ground floor,an ensuite with an electric shower as well as the main bathroom containing a bath and a large steam cubicle with shower jets etc. (It's specifications state that it requires 10lpm cold and 10lpm hot water at 1.5bar) on first floor, and a further en-suite ont he secon floor containing a bath and an electric shower.
The newly installed Biasi 28 combi, (which states at best 12 lpm (summertime) but more likely around 8lpm.) is required to supply the four basins, two baths, kitchen sink and steam cubicle,
There is a 100% certainty that the three bathrooms will be frequently used simultaneously
My suggestion... the bath and steamroom in the main bathroom should be supplied from the cylinder, all other points around the house from the combi. My assumptions, bathrooms will rarely be used at the same time as the toilet and kitchen on ground floor. The bath and shower in the main bathroom will rarely be used at the same time.
There is space on the second floor which could accomodate a cylinder and header tank . The tank would sit about 1.6 to 1.8m above the steam room shower head, but only 0.3m above the bath/basin in the en-suite on the same second floor
My questions.
- Based on the required flow rate for the steamroom shower, what size cylinder should I recommend?
- Will the 1.6m head of water create sufficient pressure for the multi headed monster steamroom shower?
- Should I take the cold water for the steamroom shower from the header tank to ensure like pressures between hot and cold - or would a pressure equalising valve be sufficent to balance cold mains water pressure, and the cylinder fed hot water, and how efficient are they at coping with fluctuation on e.g the cold, when someone flushes a toilet and the runs a basin concurrently?
- Based on the above, what size header tank should I recommend?