Gas Boilers – How to Choose a Heating System That Fits Your Home

Condensing vs conventional boilers

Condensing boilers like the Valliant gasni kotao za centralno grejanje atmoTEC PLUS VU SOE 200/5-5 H 20 kW recover heat from exhaust gases and achieve efficiency ratings above 95%, directly lowering your gas bills. Conventional atmospheric boilers cost less upfront but consume 10-15% more fuel. For new builds and renovations, condensing technology pays for itself through energy savings.

Combi boilers – heating and hot water combined

Combi (combination) boilers simultaneously heat your space and provide domestic hot water without requiring a separate cylinder. They're ideal for apartments and houses up to 120m² where simultaneous hot water demand isn't excessive. Brands like VAILLANT and PROTHERM offer models with power modulation that adjusts to actual demand.

Boiler output – the key specification

A 100m² space with standard insulation typically requires a 15-20 kW boiler. Oversizing leads to frequent on-off cycles that reduce efficiency and lifespan. A professional should calculate your property's heat loss taking into account insulation quality, number of floors, and climate zone.

Modulation technology and savings

Modern boilers automatically adjust flame output to match demand – from minimum 20% to maximum 100% capacity. This modulation eliminates frequent starts, extends equipment life and reduces harmful emissions. BOSCH and CENTROMETAL units feature advanced sensors that monitor outdoor temperature and optimize operation.

Open or sealed combustion chamber

Boilers with sealed chambers (C-type) draw air from outside through a concentric flue and are safest for installation in living spaces. Open chamber models (B-type) require a traditional chimney and adequate room ventilation. For apartments and modern houses, sealed chambers are mandated by regulations.

Additional features for easier operation

Programmable thermostats allow you to set temperature by day and hour, delivering an extra 15-20% in savings. WiFi control via smartphone app is becoming standard on premium models. Look for frost protection, automatic system filling and self-cleaning heat exchangers – features that extend safe operation.

Selection and Pricing

We offer 175 products from 8 brands across 3 sellers. Prices range from 15,999 to 8,930,280 RSD. Currently 12 products are on sale with an average discount of 11%.