Certified energy efficiency · A+
Windows certified by the Passivhaus Institut in Darmstadt with Uw ≤ 0.8 W/m²K, triple argon/krypton glazing, 88-104 mm profiles and class 4 air tightness. The key piece of any passive house or EnerPHit retrofit in the Costa Blanca and Murcia.
★★★★★ 4.9/5 on Google · Certified Passivhaus Tradesperson installers · In Alicante since 2010
Why real Passivhaus matters
The A+ stamp is not self-declared: it is granted by the Passivhaus Institut in Darmstadt after laboratory testing. This is what separates a true Passivhaus window from a "very insulating" catalogue product.
Whole-window thermal transmittance — not just the profile. Certified by the Passivhaus Institut in Darmstadt with the PHI Component mark visible on the frame.
4/16Ar/4/16Ar/4 with two low-e coatings — Ug 0.5 W/m²K. When even more is needed, krypton in 12 mm cavities for slim windows.
Frame depth that houses multiple thermal chambers + triple glazing without cutting daylight area. Steel or fibreglass reinforcement.
UNE-EN 12207 class 4 to air — the maximum. Combined with SIGA/Compriband perimeter sealing it lets the building reach n50 ≤ 0.6 in the Blower Door test.
Different glazing on each facade: g 0.55 to the south (winter gain), g 0.32 to the west (summer block). PHPP computes the optimum combination for Alicante.
Premium over standard window: 35-55%. HVAC energy savings: 65-85%. ROI in Alicante: 7-12 years; the rest of the 40+ year lifespan is pure saving.
The German standard
Passivhaus (Passive House) is a building standard defined in 1991 by Wolfgang Feist at the Passivhaus Institut in Darmstadt, Germany. It is not a marketing label: it is five quantitative criteria measured by testing.
Windows are one of the five pillars — alongside insulation, air tightness, removal of thermal bridges and MVHR. A great window in a poorly insulated wall loses profitability.
Where they fit
Not every project is a textbook new-build Passivhaus. These are the 5 scenarios where we have installed the most A+ windows in the last cycle.
Detached chalet designed from day one with PHPP. Windows are calculated opening by opening and orientation. This is where the system performs best.
A dedicated certification for full refurbishments. It allows Uw ≤ 0.85 (vs 0.80 new build) and works with existing constraints — more realistic on the coast.
Municipal libraries, community centres and sports halls complying with Royal Decree 178/2021 on nearly-zero-energy buildings. The tender requires PHI.
Controlled indoor air, no cold floors, controlled acoustics (Rw 42-46 dB). The building type where the difference is most felt in everyday wellbeing.
22-24 °C constant year-round demand. A Passivhaus envelope cuts the HVAC bill by 70-80%.
Corporate developers chasing LEED Platinum, BREEAM Outstanding or WELL certification: the Passivhaus window is virtually a requirement.
Standard window vs Passivhaus
We compare a 100 m² Alicante flat with a good-quality standard window (Uw 1.3) against the same flat with certified Passivhaus A+ windows (Uw 0.75). Data based on our closed projects 2023-2026.
| Criterion | Standard window Uw 1.3 | Passivhaus A+ Uw 0.75 |
|---|---|---|
| Price €/m² (installed) | €450-700 | €780-1,500 |
| Annual HVAC consumption | 1,700-2,300 kWh | 280-450 kWh |
| Energy bill, 100 m² flat | €1,200-1,600/year | €220-350/year |
| Indoor thermal comfort | 21-26 °C variable | 22-24 °C stable |
| Acoustic insulation Rw | 33-37 dB | 38-46 dB |
| CTE A+ rating | No (B-C) | Yes (A+ automatic) |
| Property value uplift | Baseline | +8-12% (idealista 2025) |
| Investment payback | — | 7-12 years |
Data based on a 100 m² south-west facing Alicante flat. Variables: usage profile, electricity tariff and HVAC system.
Systems we install
We only work with profiles holding a current PHI Component mark. Each system has its niche: German uPVC for the best value, premium aluminium for large openings or minimalist aesthetics.
6 chambers, 88 mm depth, central EPDM gasket and two perimeter seals. Uw 0.73-0.82 with triple glazing. PHI-certified since 2018.
Ideal for: single-family homes, EnerPHit retrofits, best value for money.
7 chambers, 92 mm, fibreglass reinforcement (no steel — fewer thermal bridges). Uf 0.89 W/m²K. Made with 75% recycled PVC.
Ideal for: DGNB / BREEAM projects, clients prioritising sustainability.
uPVC with decorative external aluminium skin, Austrian manufacture. Uw 0.62 W/m²K — top of the market. I-tec finishes with hidden hardware.
Ideal for: high-end chalets, nZEB homes prioritising aesthetics.
Spanish aluminium with a 35 mm thermal break, insulating foam in chambers. Uw 0.82 W/m²K. Allows openings up to 4 m high.
Ideal for: large picture windows, minimalist facades, public buildings.
2026 prices — reference
Indicative price per m² including VAT and installation, triple low-e glazing and Roto NX/NT hardware. The final figure depends on measurements, colour (laminated or RAL lacquered), opening type and grants secured.
Entry-level German uPVC
€780 — €1,100/m²
Triple glazing 4/16Ar/4/16Ar/4, Uw 0.75 W/m²K, white or wood-laminated. The best entry point to certified Passivhaus.
Eco-premium uPVC
€850 — €1,200/m²
Fibre reinforcement (no steel), Uf 0.89 W/m²K, 75% recycled PVC. Excellent for BREEAM Excellent or LEED Gold certification.
Austrian premium
€1,100 — €1,500/m²
uPVC with external decorative aluminium skin, Austrian manufacture. Uw down to 0.62. I-tec systems with hidden hardware and shutters.
Passive aluminium
€1,300 — €1,800/m²
Spanish PHI-certified aluminium, insulating foam in the chambers, 35 mm thermal break. Openings up to 4 m high. QUALICOAT Class 2 lacquering.
NextGen IDAE grants can cover 40-80% of the investment. They are deducted from the headline price — ask during the on-site survey.
Standard specifications
How an A+ window is certified
The Passivhaus Institute (PHI) Component mark is not a manufacturer's label: it requires laboratory testing in Darmstadt, PHPP calculation and review by an independent certifier. This is what we check on every incoming batch.
Independent research institute founded in 1996 by Wolfgang Feist. The only body authorised to issue the PHI Component stamp.
Every window carries a sticker with its category (phA, phB or phC by performance). Always check it on site before accepting delivery.
Passivhaus windows comfortably exceed the Uw required in zone B3 (1.8 W/m²K). They automatically rate A+ on the energy certificate.
Declaration of Performance under EU Regulation 305/2011. Without it, no window has been legal in Spain since 2014.
Air-tightness test required for any Passivhaus building: n50 ≤ 0.6 ach. We coordinate it with an accredited engineer.
The Spanish representative of the Passivhaus Institut. They verify the project, audit the site and issue the national certificate.
Recent Passivhaus projects
South-facing plot chalet. Kömmerling 88 MD + Cor 80 Passive on large openings. Blower Door test n50 = 0.42. PHI certificate issued in March 2025.
1980s chalet refurbished to Passivhaus. Salamander BluEvolution 92 in the openings keeping existing dimensions. Heating demand dropped from 142 to 22 kWh/m²·year.
Tech-company headquarters with BREEAM Outstanding rating. Cortizo Cor 80 Passive on the main south facade with openings up to 3.5 m high. g 0.32 solar-control glazing.
Municipal tender required the PHI Component mark. Kömmerling 88 MD with Rw 44 dB acoustic glazing for street-facing classrooms. 22 °C indoor temperature all year with no AC.
How we run Passivhaus jobs
Architectural review, opening sizing, orientations and opening-type definition per room.
2-3 weeks
Modelling in the Passivhaus Planning Package: opening-by-opening thermal balance, seasonal shading, energy demand.
1-2 weeks
Order to Kömmerling / Salamander / Cortizo. Triple glazing cut to size with warm-edge spacers. Batch traceability.
4-6 weeks
Fitted in the insulation plane with external SIGA tape (wind-tight) and internal tape (air-tight).
3-5 days/home
We coordinate the air-tightness test with a PHI-accredited engineer. If n50 ≤ 0.6, PEP issues the national Passivhaus certificate.
2-4 weeks
Certified Passivhaus team
Real Passivhaus installation requires training: poorly fitted, an A+ window loses >40% of its performance. That is why our team is Passivhaus Tradesperson certified by the PHI Darmstadt.
14 years on the Costa Blanca, 28+ certified Passivhaus homes, zero failures in the final Blower Door test.
Certified Passivhaus Tradesperson
PHI Darmstadt training, 2021. Designs the SIGA perimeter seal on every project.
DE/EN multilingual coordinator
Speaks German and English — direct contact with PHI engineers and Kömmerling / Internorm suppliers.
Lead Passivhaus installer
Specialist in insulation-plane fitting. Coordinates the Blower Door test with the accredited engineer.
Warranties and certificates
Every Passivhaus project we sign leaves with a 12-18 document dossier (digital + paper). Without it, the building cannot be certified nor can NextGen grants be claimed.
Declaration of Performance under EU Regulation 305/2011 for each reference delivered.
Original Passivhaus Institut Darmstadt mark — verifiable in the passivehouse-database.org database.
Backing from the Spanish Association of Lightweight Facade and Window Manufacturers. 10 years on product.
We coordinate the test with an accredited engineer. If n50 ≤ 0.6, the result is filed and validated by PEP.
Passivhaus Planning Package sheet with the thermal balance of each window — required by the PHI certifier.
Itemised invoice, before-and-after energy certificate, certified-installer declaration.
Passivhaus FAQ
Yes, but for different reasons than in Germany. In the Mediterranean the main saving comes in summer: triple glazing with controlled solar factor blocks aggressive solar radiation (July-August can hit 38-42 °C felt temperature on west-facing openings). A Passivhaus home in Alicante holds 23-25 °C indoors without AC running 24/7. HVAC consumption drops by 68-82%.
For a 100 m² Alicante home: the premium for Passivhaus windows over standard is €8,000-15,000. Annual HVAC saving: €900-1,300. Without grants: 8-12 year payback. With NextGen IDAE (40-80% refund): 3-6 year payback. From then on, 40+ years of pure saving.
Yes, the difference is minimal. Triple low-e glazing has TL 71-74% vs 78-80% for standard double glazing — imperceptible to the eye. The glass tint is slightly greener (low-e coatings) but only noticeable side by side. The view stays sharp.
There is no exclusive "Passivhaus" line, but the stamp unlocks the higher tiers of the three main grants: NextGen IDAE (40-80% based on demand improvement), IVACE Energia Generalitat (up to 35% stackable extra), 60% IRPF deduction (cap €15,000). Combined on EnerPHit projects they exceed 75-90% of the eligible cost.
The 60% applies when the project cuts joint heating + cooling demand by ≥ 60%. With Passivhaus windows + facade insulation + heat recovery it is achievable. Going beyond 60% (up to 80%) requires ≥ 70% reduction and A+ final certification. We deliver the technical documentation IDAE expects.
For Passivhaus or EnerPHit certification, yes — every one. Leaving a standard Uw 2.8 window in a home averaging Uw 0.75 acts as a thermal bridge and wrecks the energy balance. For partial refurbishments without a certification goal, you can start with the worst-hit orientations (west and south).
Yes. A standard Kömmerling 70 AD ships in 10-14 days. A Passivhaus 88 MD with triple low-e glazing: 4-6 weeks (glazing and hardware ship from Germany). Installation: instead of 1-2 days per home, 3-5 days because the perimeter sealing with SIGA tape is manual and meticulous. Plan with headroom.
Maintenance is identical to a standard uPVC or aluminium window: cleaning with soap and water, hardware greasing once a year, EPDM gasket review every 5 years. Sashes are heavier (triple 4/16/4/16/4 glazing ≈ 30 kg/m² vs 20 kg/m² for double), but Roto NX/NT hardware is sized for sashes up to 150 kg without sagging.
Other window types
Passivhaus windows pair well with other types when the project calls for it. These are the most requested in chalets and EnerPHit retrofits.
Free on-site survey across the Costa Blanca and Murcia.
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