Keeping heating costs down with gas-condensing boiler
22 November 2019 | Web Article Number: ME201917168
Over the past few years, there has been a significant shift from coal to natural gas. This has been largely driven by low natural gas prices and increases in electricity rates. This has led to a renewed interest in gas for home heating applications.
That’s according to Nicole Viljoen, Project Administrator at Energas Technologies, who added that in conventional heating systems (gas boilers, for example), the heated gases pass through the boiler’s heat exchange surface, transferring the generated energy to the heat distribution system such as the underfloor heating and radiators.
“Afterwards, the combustion gases are released into the atmosphere through the boiler’s flue. Thus, a certain amount of heat is lost because, together with the gases, a considerable amount of steam that forms during the burning process is being pushed out. Due to this, the released steam carries an untapped amount of evaporation energy.”
This, said Viljoen, is where a high-efficiency condensing boiler is a good choice if you are looking for a greener and more efficient boiler. This is because condensing boilers are able to make better use of the heat they generate from burning fuels, such as gas.
At just 11 kW output, Viessmann’s newest and smallest system boiler will provide end-users with an optimum-sized, efficient and reliable boiler with a lower price tag. The new Vitodens 200-W responds to demand from installers for system boilers that closely match the heat demand of the majority of modest-sized, well-insulated homes.
“Not many homes have a heat load of more than 10 kW, yet most system boiler ranges start at an output of around 19 kW. This means that the majority of system boilers in the UK are oversized,” said Viessmann marketing director, Darren McMahon.
“Homeowners are buying larger boilers than they need and once installed, the boiler cycles more than it needs to, increasing running costs and wear and tear. A correctly sized boiler will be more efficient and last longer.
“The Vitodens 200-W 11 kW model means installers no longer have to ‘range rate’ larger boilers. System boilers can now be fitted where heat-only models may have been chosen previously. The boiler has a higher heat output rating of 17 kW for the generation of hot water, so there is no trade-off between space and DHW heat.”
UK Best Buy-awarded Viessmann Vitodens 200 gas-condensing boilers, supplied locally by Energas Technologies, are available as a wall-hung boiler (Vitodens 200-W) and floor-standing storage boiler (Vitodens 222-F), with outputs from 11 kW to 60 kW.
“The boiler combines unparalleled flexibility with maximum efficiency, making it your ideal choice for a new installation or economical retrofit in large residential or commercial applications,” said Viljoen.