Prevent problems before they start! Poor maintenance is the single biggest reason why many heating and air conditioning units fail to reach their designed life. With regular equipment maintenance, utility bills can be reduced by as much as $30 per month, per system. Twice per year, fall and spring, Efficiency Air will contact you to set up a time to service your system and replace filters. Should there be a service call between maintenance visits, you will receive a 10% discount on all materials and a 20% discount on labor costs.