Retrotec DucTester 341 Manuale Utente Scaricare il pdf (Pagina 62)

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©Retrotec Inc. 2014

CFM

25

multiplier for return = 1.22

CFM

25

multiplier for supply = 1.0 (default)

Leakage splits:

SLS = 200 CFM

25

/ 270 CFM

25

= 0.74

RLS = 70 CFM

25

/ 270 CFM

25

= 0.26

Loss Factors:

SLF = (0.74 x 1.0 x 1.22) = 0.9

RLF = (0.26 x 0.5 x 1.0) = 0.13

% HVAC System Loss =











= 20%

Annual cooling loss = 20% x $1300 = $260

Annual heating loss = 20% x $ 500 = $100

Annual capacity loss = 20% x 3 ton = 0.6 tons

Annual operating SEER = (1 – 20%) x 11 SEER = 8.8 SEER

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