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    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. Heating, ventilation, and air conditioning - Wikipedia

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

    Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...

  4. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    All HVAC systems have an intake, air filter, and air conditioning liquid. However, when designing HVAC systems, many engineers design it for a specific setting and/or purpose. When engineers are designing an HVAC system, they try their best to make it compact while still being able to perform at the highest level and experiment with different ...

  5. Concealed carry in the United States - Wikipedia

    en.wikipedia.org/wiki/Concealed_carry_in_the...

    Some states require concealed carry applicants to certify their proficiency with a firearm through some type of training or instruction. Certain training courses developed by the National Rifle Association that combine classroom and live-fire instruction typically meet most state training requirements. Some states recognize prior military or ...

  6. 61 school systems in Ohio allow teachers, other staff staff ...

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    There are 61 school systems in Ohio that have armed staff, according to the Ohio Department of Public Safety. New Richmond Exempted Village School District, which recently made headlines for its ...

  7. Ductwork airtightness - Wikipedia

    en.wikipedia.org/wiki/Ductwork_airtightness

    In 2017, EN 16798-3 introduced new names for ductwork airtightness classes; ductwork systems now range from classes ATC 7 to ATC 1. The Table that follows provides the correspondence (equivalence) between airtightness classes A to D and the new names ATC 7 to ATC 1. The leakage test method for system commissioning is described in EN 12599. [8]

  8. Hillcrest Training School - Wikipedia

    en.wikipedia.org/wiki/Hillcrest_Training_School

    Hillcrest Academy is located in Springfield Township at 246 Bonham Road, Cincinnati, Ohio 45215. There are 22 on-site buildings comprising 91,329 total gross square feet. Buildings include 12 unattached housing units, gymnasium, recreation hall, chapel, 13-classroom school building, indoor swimming pool, dining hall, and administrative offices.

  9. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    HVAC (heating, ventilation, and air conditioning) is a major sub discipline of mechanical engineering. The goal of HVAC design is to balance indoor environmental comfort with other factors such as installation cost, ease of maintenance, and energy efficiency. The discipline of HVAC includes a large number of specialized terms and acronyms, many ...

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