$3999 PLUS TAXl ennox Special (up to 2 ton) Service Fee $79-$59 (residential only)1 year maintenance (2 times) $169-$129. Price will vary depending on capacity, additional accessories, condition of job site etc. With this coupon. Not valid with other offers or prior purchases. Offer expires 4/17/20. Go to LocalFlavor.com for more coupons.