Heat Energy Production

Modern thermal energy production systems - heat pumps, boilers, DHW

Choosing the central heating source is the "heart" of your building's energy performance and directly determines annual operating costs. From cutting-edge heat pumps dominating new construction, to upgraded condensing boilers and biomass systems, technology now delivers impressive efficiency ratings.

Discover in detail how each technology works, compare solutions for renovations or new builds, and learn how to produce Domestic Hot Water (DHW) at the lowest possible cost.

Heat Pumps (The Cutting Edge)

Heat pumps are the present and future of HVAC, offering unparalleled savings by harvesting free energy from the environment. Here we analyse everything: from how they work to the technical details of selection and sizing for maximum savings.

Air-to-Water Heat Pumps: How they work and why they dominate the market.

The ultimate guide for beginners. Understand how the refrigeration cycle works and see why they provide up to 75% free energy from the air.

Monoblock vs Split Heat Pumps: Comparative selection guide.

Which technology to choose? We analyse the differences in installation, advantages, frost risk and what engineers recommend for each case.

Heat pump infographic - types, COP, geothermal

Low, Medium & High Temperature Heat Pumps.

The compatibility guide for your terminal units. Learn which pump suits underfloor heating, fan coils or classic radiators.

What is COP, SCOP and how is the real operating cost calculated?

Learn to read energy labels correctly. How the coefficient of performance (COP) translates into real euros on your electricity bills.

Geothermal Heat Pumps (Open & Closed Loop).

The ultimate performance stability. How the borehole is studied, what the legislation says and how much it reduces operating costs in extreme temperatures.

Inverter Compressors & Eco-Friendly Refrigerants (R32, R290).

Everything the installer and informed owner needs to know about new compressor technologies and the safety of new refrigerants (F-Gases).

Heat Pump Sizing: The Danger of Oversizing.

Why choosing "a bigger machine just to be safe" is the biggest mistake that will increase consumption and prematurely wear out the compressor.

Hybrid (Bivalent) Systems: Heat Pump with existing boiler.

How to integrate a heat pump into a renovation while keeping the gas/oil boiler as backup for optimal savings during extreme cold.

Combining a Heat Pump with Photovoltaics (Net Billing/Metering).

The ultimate energy independence strategy. A practical case study on how to completely eliminate heating costs.

Condensing Boilers (Gas & Oil)

For apartment renovations with limited budgets or areas where fossil fuels remain the only option, condensing technology has changed the game. Discover how these boilers squeeze every drop of fuel.

Condensing Technology: How does it work?

Technical analysis of the method of recovering heat from flue gases and how this mechanism achieves fuel savings of 15-20%.

Natural Gas vs Oil: Complete comparative guide.

What is more cost-effective today? An updated comparison of fuel costs, installation expenses, maintenance and practicality for your home.

Condensing boiler infographic - operating principle, fuel comparison

Gas Boiler Balcony Installation Guide.

Strict safety rules, correct distances, flue requirements and what gas company regulations specify.

Condensate Management (Acidic Water) from Boilers.

Why these boilers produce acidic water and why special plastic siphons, neutralisers or condensate pumps are required to protect pipes.

Electric Boilers & Ion Boilers: Myths and Truths.

When is installing an electric boiler truly worthwhile and when are they consumption "black holes" you should avoid.

Disconnecting an Apartment from Central Heating.

Step-by-step guide: What the law says for apartment buildings, how the technical disconnection works and how the new gas piping route is planned.

Biomass, Solid Fuels & Alternative Sources

Ideal solutions for the Greek countryside, holiday homes and large detached houses. Biomass remains a strong alternative with low fuel cost, provided the installation follows correct modern engineering specifications.

Pellet Boilers vs Wood Boilers: What to choose.

Comparing efficiency, practicality, storage requirements and maintenance costs to find the ideal solid fuel for you.

Pyrolysis (Wood Gasification) Boilers: The evolution of biomass.

How pyrolysis technology achieves efficiency rates above 90% with simple logs, leaving minimal ash and emissions.

Biomass infographic - pellet, wood pyrolysis, energy fireplaces

Energy Fireplaces (Air-heating vs Hydronic).

Comprehensive buying guide. See how a modern fireplace can connect to your radiator network to heat the entire house.

The Critical Role of the Buffer Tank in Biomass.

Why directly connecting a wood boiler to the network (without a buffer) is a technical mistake. Technical guide to hydraulic connection and energy storage.

Solid Fuel Boiler Room Requirements.

Space specifications: Correct chimney design, required boiler room ventilation and essential fire safety measures.

Domestic Hot Water (DHW) & Solar Thermal Systems

Hot water production accounts for a huge portion of annual energy bills (especially in hotels and large families). Explore smart ways to have abundant hot water with the lowest possible consumption.

Solar Water Heaters: Open vs Closed Loop.

The king of the Greek rooftop. Which technology to choose for durability, frost protection and limescale resistance.

Selective Collectors vs Vacuum Tubes.

Analysis of solar collector technologies. Which glass performs better on cold winter days with low sunshine.

DHW infographic - solar water heaters, boilers, DHW heat pumps

Boiler Room Cylinders (Dual & Triple Energy).

How to centrally connect your home's hot water to the boiler, the rooftop solar heater and electric power for continuous supply.

DHW Heat Pumps (Heat Pump Water Heaters).

The powerful new trend replacing the classic electric water heater. ROI analysis and consumption comparison.

Instant Water Heaters (Electric & Gas): Immediate and local.

Advantages, disadvantages, power requirements (such as three-phase) and cases where an instant heater is the only solution.

DHW Recirculation.

No more waiting and water waste. How to design the network so you get hot water at the tap in just 1 second.

Legionnaires' Disease (Legionella): DHW Hygiene.

The importance of safety temperatures (above 60°C) and automated thermal disinfection cycles in modern boilers.

Main HVAC Guide

Return to the full heating-cooling guide for hydraulic networks, emission systems, ventilation, automation and energy design.

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Need help choosing?

Planning a heating system change or new installation - contact us for expert guidance.