Due to major improvements in the insulation of new build houses, the need for heating in modern properties has been reducing. This is fantastic news for the government directives which are attempting to cut UK energy use and reduce CO2 emissions. However, while the demand for heating is reducing, demand for instant hot water has not decreased; in fact, the opposite has happened, with more bathrooms being fitted across the country.
Before energy saving legislation, introduced in October 2015, a household’s energy requirement would be typically rated at 38kW, as oppose to current ratings, which can be as low as 7-10kW under new regulations. Typically, heating engineers would calculate the heating load and adding 10,000bth to reach the home’s hot water figure. Now, however, hot water needs are top priority.
With the demand for heating in air-tight houses being reduced, it provides professionals an opportunity to rethink hot water provision for now and far into the future.
Recently, triple-glazed windows have replaced double-glazed in Sweden. Therefore, the level of insulation has increased and the heat loss has dropped – so the heat input required is much less. Despite this, the demand for hot water has not decreased.
So, how do we generate hot water quickly and efficiently? Certainly not by housing a 250-litre cylinder in a cupboard that has to be heated around the clock to ensure hot water is always available. Especially when a continuous-flow hot water system would do a better job.
With a continuous-flow hot water system in place, you can never run out of hot water – no matter how many individual baths or showers are taken simultaneously. But why waste energy and money heating water for a number of hours for a brief period of use?
The only downside of the continuous-flow hot water system would be the home’s loss of the airing cupboard – but what’s the point of drying clothes and then keeping them warm? We think this is just more proof of how inefficient cylinders are in the home.
Even if you don’t use any hot water, a standard cylinder will lose a 3kW of energy per day, even at a standing loss. This means that 1095kW of energy is lost through these cylinders per year. This is a huge hole in anybody’s pockets!
By employing a continuous-flow system, this means that the only energy used is on demand. So every bath or shower taken in your home means that the installation is only burning at that time. By improving the design of gas water heaters in current years, the efficiency of hot water appliances has increased from 80% to a whopping 95%.
To make even greater savings, it is straightforward to link a renewable energy source to a direct system. The flow of domestic hot water is heated by the renewable energy source and is then fed through the water heater. The water unit is pre-set to a temperature of 60-65°C, and if the renewable energy source does not reach this temperature, the water heater makes it up.
The easiest way for our customers to understand the benefits of continuous flow for their domestic hot water needs is to relate the benefits to money savings. It is quite unknown that kilowatts and energy usage correlate with each other, but swapping to a continuous-flow hot water system can typically save a household 3kW per day – that’s £220 per year! Get in touch for a no-obligation chat about your requirements