Iberdrola España improves the energy performance of homes, spending 20% less on monthly bills

• The Smart Insulation solution, using blown-in insulation, can be put in in under a day, with no inconvenient work on the building and without having to vacate your house while it’s being done.
• The company has so far refurbished 1,000 homes, all of which have improved their energy rating.

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Iberdrola España refurbishes its first 1,000 homes using blown-in insulation and helps to reduce their energy bills by 20% and improve their energy rating.

In its commitment to support and boost the different sectors of the economy to achieve decarbonisation, in autumn 2022 the company launched its Smart Insulation solution with which, starting from €1,000 and put in in under a day, homes can improve their energy efficiency which will rerate it and reduce spending on HVAC.

Insulation is put in by injecting glass mineral wool into the air chambers available in most homes, allowing energy rehabilitation to be done at a cost 6 to 12 times lower than other options, without loss of living space and without building work, which means that it can be done in just a few hours.

The reduction in consumption associated with heating and cooling is in some cases more than 30%. The improvement is more relevant in larger air chambers, and is more noticeable in older homes as they usually don’t have any previous insulation.

With the 1,000 actions carried out so far with Aislamiento Smart, more than 1,500 megawatt hours a year have been saved, which is equal to the consumption of 500 homes. Moreover, as most of the actions are done in homes with gas boilers, this reduction is equivalent to 280 tonnes of C02 each year.

An example of an 88 square metre house built in 1975, located in San Sebastian, with an F energy rating, was upgraded by two levels to D. This reduced its energy consumption by more than 20%, from 9,600 kWh per year to 7,400 kWh, and also reduced its CO2 emissions by 23%.

Similarly, a 170 m2 duplex-style house in Madrid built in 2003 managed to improve its energy rating by one letter, from D to C, starting to save about 30% in energy and reducing its CO2 emissions by the same amount.

The injection-moulded material, made from recycled glass, requires no maintenance, is resistant to water, insects and rodents, improves fire protection by being fireproof and provides homogeneous insulation while preventing draughts. It also insulates the house acoustically from outside noise. At present, this technique is the one with the greatest energy savings per euro invested.