In a context where domestic heating costs have increased by 150% over the past ten years, a building can no longer be considered a passive element.
Sunroom solutions transform balconies and terraces into active energy assets, capable of reducing winter energy bills by up to 33%, thanks to a design approach that goes beyond simple aesthetics.
Con l’entrata in vigore della Direttiva EPBD (“Case Green”), la riqualificazione energetica è diventata un imperativo per difendere il valore patrimoniale degli immobili. Le soluzioni Sunroom trasformano balconi e terrazzi in asset energetici attivi, capaci di abbattere le bollette invernali del 33% grazie a una progettazione che va oltre la semplice estetica.
The mechanism of the Bioclimatic Solar Greenhouse: passive heat at zero cost
Many solutions presented as “verandas” are, from an energy perspective, simply enclosure systems. A Bioclimatic Solar Greenhouse instead functions as a passive solar system designed to collect heat and transfer it to indoor spaces.
For this structure to be technically efficient and recognized by regulations, it must meet precise parameters:
- Glazing Ratio: The transparent surface must represent at least 70% of the total area.
- Orientation: To maximize solar gain, the exposure must remain between South-East and South-West.
The achievable savings are widely documented: a properly designed solar greenhouse guarantees a reduction in primary energy demand for heating of more than 10%. In winter, the greenhouse acts as a “thermal buffer”: short-wave solar radiation passes through the glass and is re-emitted as long-wave heat, remaining trapped inside.
This drastically reduces heat exchange between the house façade and the cold outdoor environment.
Cold Systems vs. Thermal Break: the challenge of thermal transmittance
Energy savings cannot be achieved with single glazing alone.
A frame with a non-insulated metal profile and single glass has a thermal transmittance Uw of around 6.0 W/m²K, a value that results in extremely high heat loss.
Sunroom’s technical expertise is expressed in thermal break systems such as the S.150 TT. This system uses profiles with 42 mm polyamide bars to interrupt cold conduction.
- Extreme Performance: Equipped with low-emissivity triple glazing (Ug ≤ 0.7 W/m²K), the S.150 TT reaches a Uw value of 0.95 W/m²K.
- Regulatory Compliance: Such performance is essential for operation in climatic zones E and F, where legal limits are extremely strict (1.30 W/m²K and 1.00 W/m²K respectively).
Total Comfort: Seals and Certified Silence
Energy efficiency is intrinsically linked to airtightness.
Air infiltration and drafts are responsible for major heat losses. For this reason, Sunroom uses high-quality gaskets and airtight closing systems that significantly improve acoustic insulation performance.
Compared to standard systems, which offer limited acoustic protection, the S.150 TT system boasts a certified sound reduction of 44 dB.
This means not only a warmer home, but also complete insulation from urban noise, significantly increasing living comfort.
Measurable Value Over Time
Installing a Sunroom sliding glass system or solar greenhouse is not an expense, but a financial investment with a clear ROI.
An average family with an installation of approximately 21 m² can achieve annual savings of more than €1,200. In addition, the property value can increase by 10–20%, thanks to the improvement in energy class and the increase in year-round usable living space.
