HomeMy WebLinkAboutLETTER ABOUT VENTILATION CALCULATIONSj 4V
DEL -AIR
HEATING • MR CON13MONING
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December 20, 2019
ATTN: St. Lucie County, FL Dept. of Building & Code Regulation Division
RE: Phoenix Homes Realty Inc. - Lot 32 Tarpon Flats
The mechanical ventilation calculations as required by 2017 FBC Mechanical, 61' Edition
Chapter 401.2 for Lot 32 Tarpon Flats are designed per code and shall follow these
parameters as described as proposed in the 2017 FBC — Energy Conservation, 6th Edition
Chapter 4, not to exceed .01 x CFA + 7.5 x(Number of Bedrooms +1):
Living Square Footage: 2687
Number of Bedrooms: 3 +1 = 4 SCANNED
.01 x 2687 = 26.87 BY
4 x 7.5 = 30 St Lucie County
26.87 + 30 = 56.87 CFM
This method is also within compliance with the simplified 2017 FBC M1507.3.3(1) Chart
as listed below:
DWELLING UNrr
FLOOR AREA
(square feet)
NUMBER OF BEDROOMS
0-1 2-3 4-5 6-7 >7
Airflow in CFM
< 1,500
30
45
60
75
90
1,501— 3,000
45
L69
75
90
105
3,001— 4,500
60
75
90
105
'120
4,501— 6,000
75
90
105
120
135
6,001— 7,500
90
105
120
135
150
> 7,500
105
120
135
150
165
Del -Air designed and installed a 6" diameter fresh air ventilation intake including
mechanical damper, control, and shut off to handle code mechanical ventilation
requirement, when a residential building's envelope tests below 3ACH50.
Sincerely,
Corporate Headquarters
531 Codisco Way
Sanford, Florida 32771
Statewide (888) 831-COOL (2665)
Fax (407) 333-3853
www.Delair.com
State Lic. CAC032448