Weider heat pumps operate with geothermal energy (either via a deep, drilled hole or via a surface collector) or groundwater as their energy source.

By choosing a Weider system you are opting for an environmentally friendly system with a constantly renewable source of energy.

Sustainable energy sources are referred to as renewable energy, regenerative energy or alternative energy. The concept includes all forms of energy which - when measured in a human time frame - are continuously available. Types of renewable energies include geothermal energy, solar energy, biomass, hydropower and wind energy. In contrast, fossil fuels (oil, gas, coal) are not available in unlimited quantities.

Regardless of how long oil reserves will actually still last, geologists have determined that the steadily increasing demand will reach a point at which even newly discovered reserves will be unable to keep pace with this demand (peak oil). Excess demand leads to higher prices. Even just to counter this trend it makes sense to switch or convert to renewable energy sources wherever possible.