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2. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

3. Process duct work - Wikipedia

   en.wikipedia.org/wiki/Process_Duct_Work

   Duct slopes level to 30 degrees, 25% of cross section. Duct slopes, 30 degrees to 45 degrees, 15% of cross section; Duct Slopes, 45 degrees to 85 Degrees, 5%; Above 85 degrees, a 2 in (50 mm) interior coating of dust. These loads are always confirmed with the client, before use, but the above in US common practice

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   In certain states, counties, or cities, either of these codes may be adopted and amended via various legislative processes. These codes are updated and published by the International Association of Plumbing and Mechanical Officials or the International Code Council respectively, on a 3-year code development cycle. Typically, local building ...

5. List of postal codes - Wikipedia

   en.wikipedia.org/wiki/List_of_postal_codes

   U.S. ZIP codes. Range 96950–96952. Norway: 18 March 1968 NO: NNNN, CC-NNNN From south to north NO- prefix is used recommended, but not mandatory to be used for international mail to Norway [22] Oman: OM: NNN Deliveries to P.O. Boxes only. Pakistan: 1 January 1988 PK: NNNNN Palau: 1 July 1963 PW: NNNNN, NNNNN-NNNN U.S. ZIP codes. All locations ...

6. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Some flexible duct markets prefer to avoid using flexible duct on the return air portions of HVAC systems, however flexible duct can tolerate moderate negative pressures. The UL181 test requires a negative pressure of 200 Pa. To use flexible ducting in a system, make sure to pull the duct tight so you get the full internal diameter.

7. Air-mixing plenum - Wikipedia

   en.wikipedia.org/wiki/Air-mixing_plenum

   Air streams are mixed to save energy and improve energy efficiency by partially recirculating conditioned air.. The most common application for an air-mixing plenum is the mixing of return air (or extract air) with fresh air to provide a supply air mixture for onward distribution to the building or area which the ventilation system is serving. [1]