WHY DO CONDENSING BOILERS MODULATE?
Modulating boilers change their gas and fan rates so as to use only as much energy as necessary to cater for a particular demand. This results in components not working at full peak all of the time. With modulating gas valves the rate is gradually reduced as temperatures are reached. This saves fuel and energy. KILOWATTS AND FLOW RATES The higher the kilowatts (KW) and flow rates a boiler has the better it is suited for larger households. For example the ecoTEC plus 937 is designed for larger properties. The relevant specs from Vaillant for this boiler are : 200 litres of blended hot water (Δ=35°C) in 10 minutes 15.2 l/min flow rate @ 65°C 15 litre “actoSTOR” recharges in just 2 minutes domestic hot water output up to 37.0 kW What these figures mean is that higher flow rates and kilowatts results in quicker bath filling, better shower performance and instantaneous hot water at several supply points at the same time. SEDBUK SEDBUK is a Government run program established to ensure best p
