Call Oxygen Air for a free ventilation quote on 0800 85 40 85. We will visit your home for a free, no obligation ventilation installation 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. HRV or home ventilation starts from just $2,995 inclusive installed! We specialise in Aspen Ventilation systems, both positive pressure and balanced pressure with heat recovery. Call us today for your free Aspen Ventilation hrv 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 quote in Auckland today. Home Ventilation is also referred to as hrv.