Physical data (continued), Methods to size hrvs – Bryant HRVBBSVA User Manual
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Physical data (continued)
Model
HRVBBLHA1150
HRVBBLHA1250
HRVBBSVA1100
HRVBBSHA1100
Capacity—CFM @
0.5-0.3ESP (in. wc)
130---168
191---210
99---107
99---107
Efficiency (Sensible)—Percent
65
65
66
66
Efficiency (Sensible) Percent
32_F (0_ C)
--13_F (--25_ C)
65
65
65
60
66
66
66
66
Efficiency (Latent)—Percent
@ all temperatures
0
0
0
0
Heat Core Exchange Area—
cu ft (cu m)
120 (3.4)
166 (4.7)
55 (5.1)
55 (5.1)
Model
HRVBBLHA1150
HRVBBLHA1250
HRVBBSVA1100
HRVBBSHA1100
Voltage
120
120
120
120
Max Power — watts
150
218
150
150
Max Amps
1.4
1.9
1.3
1.3
Methods to Size HRVs
Method 1:
1. Calculate cubic feet of occupied space
2. Multiply by recommended air changes per hour (AC/h)
3. Divide by 60 minutes per hour to convert to CFM
Example: 2000 sq ft with 8 ft ceiling
0.35 air changes per hour (AC/h)
(2000 sq ft x 8 ft ceiling x 0.35 AC/h) / 60 min/h =
93.3 CFM
Method 2:
1. Multiply number of people times 15 CFM/person
2. Multiply number of bathrooms times 20 CFM/each
3. Add 25 CFM for kitchen
Example: 2 people
2 bathrooms
1 kitchen
(2 x 15) + (2 x 20) + 25 = 95 CFM
Additional heating and cooling load charts
Although the ventilators process the outside air before it enters
the home, additional heating and cooling loads need to be
considered.
HEATING LOAD BTU
Outside Temp
°F
Heat Load (BTUh)
@ Inside Design
Temp 72°F
HRVBBLHA1150
–25
4,688
–20
4,466
–15
4,598
–10
4,334
–5
4,069
0
3,805
5
3,541
10
3,502
15
3,220
20
2,938
25
2,950
30
2,636
35
2,322
40
2,009
The heating load chart shows the heating loads in BTUh for a
range of winter design temperatures for each model of ventilator.
EXAMPLE: The heating design temperature for Milwaukee,
WI, is --4_F. At --5_F, the additional heating load of the
HRVBBLHA1250 is 8417 BTUh. This additional load should be
taken into consideration when sizing the heating equipment.