Combi Boiler System

Combi boiler systems are compact and efficient units designed to provide both space heating and domestic hot water.
They are ideal for homes, offices, and small commercial buildings, offering low installation cost, quiet operation, and easy maintenance.
Due to their compact size, they are also aesthetically suitable for modern interiors.

How a Combi Boiler Works

A combi boiler heats water on demand without the need for a storage tank.
When there is a call for heating or hot water, the boiler ignites and heats the water circulating through the system.
The heated water is delivered directly to radiators, underfloor heating, or domestic taps.

This instant heating mechanism eliminates standby energy loss and maximizes energy efficiency.

Types of Combi Boilers

Open-Flue (Chimney) Boilers

Use air from the room for combustion and vent exhaust gases through a flue.
They require proper ventilation and regular flue maintenance.
Now largely replaced by sealed (hermetic) systems due to safety concerns.

Hermetic (Conventional) Boilers

These sealed systems use a fan to draw in outside air and expel combustion gases.
They do not rely on room air, providing a safer and more flexible installation.
Perfect for apartments or buildings without traditional chimneys.

Condensing Boilers

Recover heat from exhaust gases by condensing the water vapor inside them,
achieving efficiency levels above 90%.
They consume less natural gas, emit less CO₂, and are the most energy-efficient choice for modern heating systems.

Electric Boilers

Operate entirely on electricity and do not require a flue.
They are emission-free and safe from gas leakage risks,
making them suitable for areas without access to natural gas or where environmental impact is a concern.

Key Factors When Choosing a Combi Boiler

• Heating Capacity: Must match the building’s size and heat loss characteristics.

• Hot Water Demand: Consider the number of bathrooms and simultaneous water use.

• Energy Efficiency: Condensing boilers provide the best long-term savings.

• Safety Features: Look for flame monitoring, gas cut-off, and frost protection systems.

• After-Sales Support: Choose brands with reliable service and warranty coverage.

Engineered by MYMEC GROUP

MYMEC GROUP designs and installs EN 15502-compliant combi boiler systems,
performing heat load analysis, flue system design, gas line safety control, and commissioning with professional engineering standards.

We prioritize energy efficiency, safety, and user comfort, delivering reliable and long-lasting heating solutions for modern living spaces.