 Mix Plumbing and Heating's incredible summer promotion has been extended to October. That's right, October 31st. They will hand you $500 cash directly with a full HVAC change-out. Call Mix at 301-271-2488 today and ask for Kenny or Tiff to get your coupon. Mix will also throw in a complimentary UV light for your new HVAC system. Wait, there's more. Champion's additional rebate of up to $325.