SterraCare Additional Warranty For Sterra Mars™ Air Purifier from $35.00 $0.00 /per or 4x $8.75 w/ or 3x $11.66 w/ SterraCare adds two years additional warranty to your new Sterra Mars Air Purifier. Priority access to Sterra Customer Care Sterra-certified repairs using genuine parts Motor, leakages, parts, touch panels covered Type 2-Year 4-Year Product variants 2-Year 4-Year Add to Cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.