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Home » Store » Books » Manual LLH - 2019 (HVAC System Design for Low Load Homes)
Manual LLH Cover_Final.jpg

Manual LLH - 2019 (HVAC System Design for Low Load Homes)

$135.00
Books

Product Details

Manual LLH deals with the unique HVAC design issues associated with homes that exhibit low cooling and /or heating loads (per Manual J® load calculations) and identifies equipment options / approaches to address these issues. The manual augments the explicit instructions provided in the ACCA residential HVAC design process … load calculations, duct design, equipment selection, grille/register selection and placement, zoning, and dehumidification for residential applications; per the underlying ACCA Manuals J® / D® / S® / T® / Zr® / SPS® / RS®.


Part 1 of Manual LLH addresses the specific challenges associated with using small tonnage HVAC systems that are needed in low load homes:


Part 2 of Manual LLH illustrates six ‘example solutions’ using representative equipment offerings available today:

Manual LLH Part 3 appendices provide ancillary details and information to support application of the core issues and concepts. The overarching intent is to provide HVAC practitioners with a contractor / designer / installer friendly presentation that succinctly deals with core concepts and provides easy to follow guidance.

  1. small duct high velocity (SDHV) equipment,
  2. ductless mini-split equipment,
  3. fan powered mixing boxes,
  4. air-zoning dampers for capacity deployment,
  5. engineered bypass air,
  6. conventional OEM equipment and ductwork with supply air nozzles.
  • low equipment airflows (a room air mixing challenge),
  • increased home ventilation requirements (an equipment selection challenge),
  • equipment low latent capabilities (an equipment selection challenge),
  • higher than normal latent needs (an indoor humidity control challenge).

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