The HVAC system type are 100% DOAs across the project and FCUs. However I'm having a problem regarding the minimum ventilation rate of 0,3 cfm/sf since the hotels rooms have very low outside airflow rate.

I'm struggling to:

1) Renovate 14.000 cfm/sf, because at the design conditions hotel rooms need to be running 72 days before occupancy (path 1);

2) Achieve the minimum ventilation rate of 0,3cfm/sf (path 2) due to the rooms' very low cfm/sf of outside air (path 2);

Is there an option to include natural ventilation in the calculations (opening windows) to achieve the credit through path 1? This could be a viable option to do in Portugal, due to its mild and dry climate during the day. This way, the 60/60 requirement would't be a problem and path 1 would be achievable.

Please advise on this mater and thank you all in advance!

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Dylan Connelly

Mechanical Engineer

Integral Group

LEEDuser Expert

342 thumbs up

Tue, 03/05/2019 - 03:02

Not every credit is meant for every project. You can also do the testing method. Natural ventilation doesn't count towards path 1. You can bring in temperate fans if you need to achieve higher levels.

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