Call Oxygen Air for a free (hrv) ventilation quote on 0800 85 40 85. We will visit your home for a free, no obligation hrv quote anywhere in Auckland. Home ventilation is important for your family or your tenants as ventilation will introduce filtered, clean air and help greatly with removing condensation. We specialise in Aspen Ventilation systems, both positive pressure and balanced pressure with heat recovery. Call us today for your free Aspen Ventilation quote. Aspen Ventilation is the only brand that carries a comprehensive 7 year warranty in NZ. Call Oxygen Air on 0800 85 40 85 for a free hrv ventilation quote in Auckland today.