More Light, Less Consumption

How to Reduce Heating Costs by 30% with the Sunroom Range

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.
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 (https://www.sunroom.it/en/categoria-prodotto/products/bioclimatic-solar-greenhouses/) 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 (https://www.sunroom.it/en/product/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.