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  1. Manual J Calculation? - HVAC-Talk

    Aug 9, 2007 · For load calculations they use the Manual J (either 7th edition or 8th edition (full or abridged). Thus you immediately have three different algorithms for “loads” being used by the …

  2. Manual J Measurement question - HVAC-Talk

    Jan 15, 2015 · I am receiving conflicting answers about how to measure the room size for an ACCA Manual J calculation. Please help. Are we measuring from exterior wall to exterior wall, or interior …

  3. Manual J calculation and CFM - HVAC-Talk

    Aug 5, 2020 · Hi, I have a question about the results I have from a manual J calculation. The info about the house was input (room sizes, type of construction, insulation or lack there of, window and door …

  4. Manual J Calculation? - HVAC-Talk

    Aug 11, 2007 · For load calculations they use the Manual J (either 7th edition or 8th edition (full or abridged). Thus you immediately have three different algorithms for “loads” being used by the …

  5. Help with Manual J calculation - HVAC-Talk

    Jul 9, 2022 · Greetings, I am trying to perform a Manual-J calculation to ensure that my replacement a/c unit and furnace are properly sized. I used the Cool Calc software and completed the fields to the …

  6. Questions Concerning Manual J Load Calculation For A...

    Mar 20, 2014 · I am attempting to perform a Manual J Load Calculation on a 1989 Fleetwood Double Wide Home. The home is 27 x 48 = 1296 square feet. I am fully aware that one of the biggest …

  7. 2 If abridged version of Manual J is used for load calculation, then verify residence meets requirements, see Abridged Edition Checklist on page 13 of instructions.

  8. What is a manual J load calculation? - HVAC-Talk

    Jun 4, 2011 · The manual J is required here to even get a permit here. Bare bones basic it is the calculation of the sq of the house, combined with the amount of window space of the house, …

  9. Manual J and existing structures - HVAC-Talk

    Mar 17, 2016 · I often see posts that talk about doing this Manual J calculation on an existing home. I don't understand why this would ever even be considered for a house with existing real data. It would …

  10. Manual J calculation vs. keeping a journal of actual cycle times

    Jul 7, 2024 · I'm curious which would be more helpful: Paying for a manual-J calculation or just keep a journal of actual cycles of the current system? Thoughts? A/cs could run 80-90% of the time at …