Estimate the domestic hot water load LDHw for a house of 4 occupants in April in London. This shall include the load for hot water production at a desired temperature of 60C, the heat losses in the pipes and the hot water tank. The volumetric consumption is 160 l/day. It is given that the mains cold water temperature in April in London is 13C. The pipes have external diameter 3/4 inch, length 24m and have insulation. The technical room interior temparature is 18C, the daily operation of hot water returns is 15 hours and the tank has thermal losses 2.5 kWh/24h. Provide the value of LDHW in kWh rounding to the nearest integer.