Most often, the owners of country cottages are faced with a power outage. Short-term power outages do not lead to a noticeable decrease in the temperature in the house. In modern buildings with thermal insulation, stopping the heating system for 3–4 hours due to a power outage can lead to a decrease in the temperature in the premises by 1–2 ° C, which, in general, is not critical. Longer outages will require the use of self-contained power supplies.
one Install an inverter-battery power system
To power the heating system, you can use an inverter-battery power system of a relatively small capacity. So, for example, the energy consumption of a gas boiler with a closed combustion chamber (with an electric fan) and a heating system circulation pump will be approximately 250 W / h (150 W — boiler, 100 W — pump), a battery with a capacity of 200 A / h will be able to keep them in working condition about 6.5 hours. And if you have a non-volatile boiler (with an atmospheric burner), then only the circulation pump will consume energy, and the battery life will increase several times. The cost of such an inverter system will be 30–500 $.
2 Install voltage stabilizer
To protect against voltage surges, the gas boiler must be equipped with an appropriate power supply that equalizes the voltage and protects the elements of the control board. If such a unit is not available, it is necessary to purchase and install equipment that replaces it — a voltage relay (stabilizer) and a surge current protection device (SPD). If the voltage relay serves only the line where the boiler is connected, then it can be relatively low-power (for example, 300 W if the boiler power is 250 W), but sensitive (with an accuracy of 3%).
All this equipment is not installed in a room with a gas boiler; the easiest way is to mount it on a DIN rail in a shield. A set of relays and SPDs will cost 50–60$.
3 Choose a gravity heating system
Ideally, of course, the best is a completely non-volatile system, with a boiler with an atmospheric burner and a mechanical control system and with the so-called gravitational coolant circulation scheme. The gravity system does not require the use of a circulation pump, the movement of the coolant in it occurs due to the pressure difference between two columns of liquid (heated and cooled). This system does not need electricity at all. But the gravitational circulation scheme has its limitations and design features. It requires accurate hydraulic calculation and design (laying pipes with a given slope, using pipes of a certain diameter, installing the boiler below the level of the heating devices and a number of other points).
Structural diagram of the gravitational heating system
four Select device with remote controller
Modern means of communication allow you to control the boiler mode remotely — you will immediately receive a message if there are problems with the boiler.
Whatever heating devices you use, in conditions of unstable operation of utility networks, it is important to be able to remotely control their condition and performance. For Bosch, this is the Bosch Control CT100 Internet room thermostat, which allows you to control the boiler via the Internet using the Bosch Control application available in the AppStore or Google Play. At Ariston, remote control is built into Alteas boilers and is available for all Ariston EVO, X and One series boilers using the Cube S Net room temperature sensor. Other major manufacturers have similar systems.