Second Opinion Quote Free. Disclaimer: *Offer includes the purchase of any new Lennox system; furnace 95% minimum efficiency and receive 50% off any Lennox air conditioner. Credit purchases subject to credit approval. Cannot be combined with other offers. Other restrictions apply. Offer may be withdrawn at any time without notice. Ohio License #s 45611. Expires 07/31/24. **Present at time of purchase. Cannot be combined with other offers or discounts. $69 tune-up plus CO Detector for new customers only. Free second opinion quote for residential customers only. Some restrictions apply. Expires 07/31/24.