Gas fired boilers: make the right choice

Gas boilers are heating equipment that not only power radiators but also provide domestic hot water (DHW) either stored in a tank or not. The more efficient models offer great thermal comfort while being economical on gas.

What is the future for gas boilers?

The 2022 installation ban only concerns oil boilers. Gas boilers are not affected at all. On the contrary, they are more relevant than ever given the performance displayed by condensing models in particular.

This performance is linked to their low level of smoke emission, high thermal efficiency, and the savings that this heating system provides. These advantages make efficient gas boilers eligible for energy renovation grants.

What is the best gas boiler?

The most efficient gas boilers are low-temperature, condensing, or mixed boilers. However, the best gas boiler is the one that best suits your needs. It all depends on the configuration of your home and the level of comfort desired.

Indeed, a gas boiler must be sized according to the surface area of the house and produce domestic hot water according to your requirements. Whether condensing, low-temperature, wall-mounted, or floor-mounted, it must optimize thermal comfort and adapt to the needs of the users.

The operating mode of a condensing gas boiler allows it to:

heat water to about 90 °C;
offer an efficiency of around 105 %;
recover the energy generated by the combustion of gas (condensation of smoke);
consume less fuel (-30 %) compared to a conventional boiler;
draw air from the outside through a dedicated conduit;
evacuate combustion smoke through a vented outlet (no chimney).

The low-temperature model works differently:

it heats water to 40 °C;
it offers an efficiency of 90 %;
it is cheaper to purchase;
it allows for 20 % fuel savings compared to a conventional model;
it draws air from the room where it is installed;
it evacuates smoke outside via a chimney conduit.

To heat the home, this equipment can be connected to two heat diffusers:

hot water radiators, whose dimensions depend on the surface area and volume of the rooms to be heated;
underfloor heating (radiant floor heating).

Mixed or dual-service gas boilers offer the possibility of producing domestic hot water. Existing models differ by their hot water production system:

storage with a hot water tank of approximately 50 liters per person;
micro-storage with a small capacity hot water tank (3 to 5 liters);
instantaneous (for low hot water needs).

Regardless of the chosen model, an annual maintenance of the gas boiler is essential.

What is the most economical gas boiler?

The THPE (Very High Energy Performance) gas boiler is an economical way to heat a home and produce domestic hot water (depending on the model).

At ManoMano, you will find major brands of gas boilers: Atlantic, Bosch, Daikin, De Dietrich, Initia HTE, Saunier Duval, and many more. Through our partner companies, you will also find solutions for installation and maintenance work at your home.