Choosing a gas boiler is a decision that should follow from specific technical conditions and the household’s real needs. In practice, two solutions are compared most often: a system boiler with a DHW cylinder and a combi boiler with an instantaneous water heater. Termet offers both. Which should you choose? Let’s take a look.
Two types of appliances dominate the market: system boilers that can be connected to a domestic hot water cylinder, and compact combi boilers that heat water instantaneously. Although both heat rooms and domestic hot water, they differ in how they operate, in installation requirements, and in their range of applications. Which will work better in your case?
System boiler – advantages and disadvantages
Termet system boilers, for example from the APLA range, are designed to supply the central heating system and to work with an external domestic hot water cylinder. Water in the cylinder is heated automatically, and the stored volume lets household members use several draw-off points at once without a drop in temperature or pressure.
The main advantage of system boilers is a stable water temperature regardless of the number of users, so they are an ideal solution for homes with more than one bathroom. In addition, to keep the water in the cylinder at the right temperature, the boiler only needs to fire from time to time. It does not have to run at full output every time a tap is opened, which extends its service life. Another advantage of a system boiler with a cylinder is the option of integrating it with photovoltaics and .
Having listed the advantages, it is also worth mentioning the drawbacks. One is the need to find space for the cylinder, as well as a longer installation time and a higher installation cost. A boiler with a built-in cylinder, for example Integra Comfort, can be a solution.
So who is a system boiler a good choice for? For families, users who value comfort, and investors planning
Combi boiler – advantages and disadvantages
Combi boilers, such as Termet Crystal III, are compact appliances that supply the central heating system and heat domestic water instantaneously., meaning that when you turn on the tap the gas burner starts and heats the water flowing through the heat exchanger. Such boilers work very well in small apartments where saving space and a low investment cost are the priority. Their main advantage is the absence of a cylinder, which in practice means they take up less space and are easier to install. As a result, the purchase and installation cost of such a boiler is also lower. The appliance is not without drawbacks, however, because DHW heating output is limited, which can result in a drop in water temperature when several draw-off points are used at the same time. For points farther from the heat source, a longer wait for hot water can also be an inconvenience. A combi boiler also does not allow you to use energy from photovoltaic or photovoltaic-thermal panels to heat water. So who can a combi boiler be recommended to? Singles, couples, or users of small apartments with modest DHW demand.
What should guide you when choosing a gas boiler?
There is no universal boiler. In large homes and wherever comfort of hot water use is a priority, it is worth choosing a system boiler with a cylinder. If saving space and budget is what counts, a combi boiler will be the right solution. Termet offers both types of boilers, and thanks to proven features such as DHW cylinder control, PV integration, and online control, an installer can easily match the system to the user’s needs.
Learn more about system and combi boilers from Akademia Ciepła – Termet S.A. on YouTube: