Carrier 40MAQB24B--3 Mini Split Air Handlers | Carrier HVAC Carrier® Performance™ Ductless 24000 Btu Heat Pump High Wall . Item: 40MAQB24B--3 . MFR: 40MAQB24B--3 If security is an issue, outdoor and indoor units are connected only by refrigerant piping and wiring to prevent intruders from crawling through ductwork. In addition, since the outdoor units can be installed close to an outside wall Ductless Systems | Carrier Building Solutions North America Your product information request has been sent! Email has been sent to you , please check your spam/junk emails if you are unable to find the email. Carrier Building Solutions Carrier Commercial NA is pleased to announce that two of its most innovative new products have been selected as winners in Consulting-Specifying Engineer magazine’s 2019 “Product of the Year” program. The magazine bills itself as the industry’s premier construction engineering resource for commercial building systems.