01 / COMFORT
Steady through the seasons.
Less overheating in summer, less heat loss in winter.
OUTSIDE −5 °C WINTER
INSIDE 21°C DESIGNED COMFORT
ANOPHERIA · HIGH-PERFORMANCE BUILDINGS — ATHENS
Anopheria designs and builds Passive House buildings that stay comfortable through summer and winter, bring filtered fresh air into every room and need very little heating or cooling.
WHAT PASSIVE HOUSE CHANGES
A Passive House is designed so carefully that it needs very little heating or cooling, while a quiet ventilation system continuously brings filtered fresh air into the building.
01 / COMFORT
Less overheating in summer, less heat loss in winter.
02 / AIR
Fresh air from the outside is constantly renewed even with the windows closed.
03 / ENERGY
The building keeps the comfort you have already paid for.
Straight to site, using familiar details and optimistic assumptions. Comfort and energy use are rarely calculated together, and the finished building is seldom tested against what was promised.
Weak insulation and exposed thermal bridges let the structure store heat and release it long after sunset. Cooling has to fight the building itself.
INSIDE 34 °C · AUGUST, 11PM — ILLUSTRATIVE SCENARIO
Ventilation cannot rely on an open window. In an occupied room, CO₂ and humidity build up quickly. Noise, heat and dust limit how often a window can stay open.
CO₂ 1,650 PPM · BEDROOM, 7AM — ILLUSTRATIVE SCENARIO
“Sustainable.” “Green.” “Energy-efficient.” Labels are easy to print. The useful questions are harder: what was calculated, what was tested, and what will be measured after handover?
More than 80% of your life happens indoors. When a building overheats, wastes energy or traps stale air, you live with it every day — in insufferable temperatures, air high in CO₂ and unaffordable energy bills.
NONE OF THIS IS INEVITABLE
Before the first wall exists, we calculate how the building should feel, how much energy it is going to need, how much it would cost and how it should be built. If the design does not perform on screen, it does not go to site.
On site, the calculated building becomes the reference. We oversee the details that decide comfort and energy use — airtightness, continuous insulation, window installation and mechanical ventilation — until the physical building matches the design.
01 / THE ENVELOPE
A continuously insulated envelope slows heat entering in the summer and escaping in winter. A pressurisation test checks that air is not leaking through the finished building.
n₅₀ ≤ 0.6 h⁻¹ — VERIFIED AIRTIGHT
02 / THE AIR
A quiet mechanical ventilation with heat recovery system removes stale, humid air and continuously brings fresh filtered air into the building, while recovering most of the indoor warmth or coolness.
CO₂ < 800 ppm · HUMIDITY 40–60%
03 / THE ENERGY
Because the building holds comfort so well, the active system can be much smaller. In some homes, one compact heat pump or AC may be enough; we calculate that project by project. Add on-site renewables and the annual balance can move towards zero or beyond.
≤ 15 kWh/m²·YR HEATING DEMAND · PEB PATH WITH RENEWABLES
Critical details are inspected during construction. At completion, pressurisation testing, thermal imaging and ventilation commissioning check the physical result. Independent Passive House certification then verifies that the design and finished building meet the standard.
The room you started in was 21°C because the building was designed to hold comfortable conditions with very little energy. Sensors log temperature, air and energy for twelve months after handover. The design made a promise; the finished building is measured against it.

Three of these are finished and certified. One of them has been measured in use against the figures published before the work began, and came in under them. That is the whole argument, and it is now a building rather than a promise.
Homes and commercial buildings, from design to post-construction.
Our servicesNew builds and deep renovations designed for steady comfort, filtered fresh air and very low heating and cooling demand.
EXPLORE
Workplaces and hospitality buildings with predictable comfort and lower operational energy.
EXPLORE
Twenty engineers, architects and scientists — one team, accountable from the first model to the last sensor.
ArchBuilder is our six-phase delivery system, developed with the Hellenic Passive House Institute. It connects the first energy model, construction decisions, quality checks and the sensors that verify the finished building.
How we build
If yours isn’t here, it deserves a conversation — not a paragraph.
Ask yours directlyThe cost depends on the design and the starting point, not on the standard itself. We model construction and calculate operating costs early, so the full picture is on the table before any decision. That way you can compare the additional investment with the energy and comfort benefits before committing.
Yes, when it is designed for the climate. Shading limits summer sun, insulation slows heat entering the building and ventilation removes stale air without relying on open windows. The exact cooling system is calculated for each project.
Usually yes, but much less of it. The heating and cooling load can be small enough for a compact system. In some homes, one heat pump or AC may be enough; the answer depends on the size, layout, orientation and use of the building.
We can join at different stages: new build, deep renovation or certification consulting on a project we do not construct. The first step is to assess the existing work against your comfort and energy goals.
Every building is monitored for twelve months after handover through sensors that measure temperature, air quality and energy consumption. Performance becomes measured data, not a promise, and any gap against the model is optimised.
FOUR OUTCOMES · ONE STANDARD
Your building already exists — in the numbers. One conversation starts Building No. 1: we model it, agree the targets in writing, then go and build it twice.
HELLO@ANOPHERIA.COMATHENS, GREECE
THE ANOPHERIA PROMISE, KEPT ON EVERY PROJECT