12
STALE AIR
FROM BUILDING
FRESH AIR
TO BUILDING
FRESH AIR
FROM OUTSIDE
STALE AIR
TO OUTSIDE
A92382
Fig. 21 --- HRVBBSVU Airflow During Air Exchange
STALE AIR
FROM BUILDING
FRESH AIR
TO BUILDING
FRESH AIR
FROM OUTSIDE
STALE AIR
TO OUTSIDE
A92384
Fig. 22 --- HRVBBLVU Airflow During Air Exchange
STALE AIR
FROM BUILDING
FILTERED AIR
TO BUILDING
A92383
F i g . 2 3 --- H R V B B S V U A i r f l o w D u r i n g
Recirculation and Defrost
STALE AIR
FROM BUILDING
FILTERED AIR
TO BUILDING
A92385
F i g . 2 4 --- H R V B B LV U A i r f l o w D u r i n g
Recirculation and Defrost
HRV