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  2. Category:Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Category:Heating...

    Pages in category "Heating, ventilation, and air conditioning" The following 200 pages are in this category, out of approximately 248 total. This list may not reflect recent changes .

  3. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    A two-stage air conditioner is designed to operate on high and low settings during different weather conditions and seasons. The high setting is used during extreme weather, and the low setting is used during moderate weather. This type of air conditioner produces a balanced temperature and is in use for a longer period of time.

  4. 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 ...

  5. English auxiliary verbs - Wikipedia

    en.wikipedia.org/wiki/English_auxiliary_verbs

    The first English grammar, Bref Grammar for English by William Bullokar, published in 1586, does not use the term "auxiliary" but says: All other verbs are called verbs-neuters-un-perfect because they require the infinitive mood of another verb to express their signification of meaning perfectly: and be these, may, can, might or mought, could, would, should, must, ought, and sometimes, will ...

  6. English verbs - Wikipedia

    en.wikipedia.org/wiki/English_verbs

    The base form or plain form of an English verb is not marked by any inflectional ending.. Certain derivational suffixes are frequently used to form verbs, such as -en (sharpen), -ate (formulate), -fy (electrify), and -ise/ize (realise/realize), but verbs with those suffixes are nonetheless considered to be base-form verbs.

  7. English orthography - Wikipedia

    en.wikipedia.org/wiki/English_orthography

    English orthography comprises the set of rules used when writing the English language, [1] [2] allowing readers and writers to associate written graphemes with the sounds of spoken English, as well as other features of the language. [3] English's orthography includes norms for spelling, hyphenation, capitalisation, word breaks, emphasis, and ...

  8. List of English irregular verbs - Wikipedia

    en.wikipedia.org/.../List_of_English_irregular_verbs

    Originally a preterite; see English modal verbs: need (needs/need) – needed – needed: Weak: Regular except in the use of need in place of needs in some contexts, by analogy with can, must, etc.; [4] see English modal verbs: ought – (no other forms) Defective: Originally a preterite; see English modal verbs: pay – paid – paid overpay ...

  9. American and British English spelling differences - Wikipedia

    en.wikipedia.org/wiki/American_and_British...

    Commander-in-chief prevails in all forms of English. Compound verbs in British English are hyphenated more often than in American English. [191] any more or anymore: in the sense "any longer", the single-word form is usual in North America and Australia but unusual elsewhere, at least in formal writing. [12]