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HRVBBLHU1150 HRVBBLHU1250 HRVBBSVC1150 HRVBBSVC1200 HRVBBLVU1150 HRVBBLVU1200 HRVBBLVU1330 Capacity — CFM @ 0.5– 0.3ESP (in. wc) 130–168 191–210 106–150 177–211 123–141 189–209 300–334 Efficiency (Sensible) — percent 32°F (0°C) –13°F (–25°C) 65 65 65 60 69 60 77 67 81 69 84 72 80 74 Efficiency (Latent) — percent @ all temperatures 0 0 0 0 0 0 0 Heat Core Exchange Area — cu ft (cu m) 120 3.4 166 4.7 90 8.4 144 13.3 144 13.3 210 19.5 210 19.5 ELECTRICAL DATA CONVENTIONAL COMPACT HIGH EFFICIENCY Model HRVBBLHU1150 HRVBBLHU1250 HRVBBSVC1150 HRVBBSVC1200 HRVBBLVU1150 HRVBBLVU1200 HRVBBLVU1330 Voltage 120 120 120 120 120 120 120 Max Power — watts 150 218 115 195 115 250 500 Max Amps 1.4 1.9 1.2 1.8 1.2 2.2 5.4 —8— METHODS TO SIZE HRV’S METHOD 1 1. Calculate cu ft of occupied space. 2. Multiply by recommended air changes per hr (AC/h). 3. Divide by 60 minutes per hr to convert to CFM. EXAMPLE: 2000 sq ft with 8 ft ceiling 0.35 air changes per hr (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 bath rooms 20 CFM/each. 3. Add 25 CFM for kitchen. EXAMPLE: 2 people 2 baths 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 HRVBBLHU1150 HRVBBSVC1250 HRVBBSVC1150 HRVBBSVC1200 HRVBBLVU1150 HRVBBLVU1200 HRVBBLVU1330 –25 4,688 8,165 6,970 7,690 5,500 6,650 9,990 –20 4,466 7,744 6,470 7,090 5,030 6,070 9,310 –15 4,598 8,008 5,990 6,520 4,590 5,510 8,650 –10 4,334 7,547 5,520 5,970 4,160 4,970 8,000 –5 4,069 7,087 5,070 5,440 3,750 4,470 7,380 0 3,805 6,627 4,550 4,840 3,300 3,910 6,640 5 3,541 6,167 4,130 4,360 2,940 3,470 6,060 10 3,502 6,100 3,730 3,900 2,600 3,050 5,500 15 3,220 5,608 3,290 3,400 2,240 2,600 4,870 20 2,938 5,116 2,930 3,000 1,940 2,240 4,350 25 2,950 5,138 2,580 2,610 1,670 1,910 3,850 30 2,636 4,591 2,240 2,250 1,410 1,600 3,370 35 2,322 4,045 1,900 1,880 1,160 1,300 2,870 40 2,009 3,498 1,600 1,560 940 1,040 2,430 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 HRVBBLHU1250 is 8417 Btuh. This additional load should be taken into consideration when sizing the heating equipment. —9— COOLING LOAD BTU Outside Enthalpy Btu/lb Cooling Load (Btuh) @ Inside Design Temp 75°F and 50% Relative Humidity HRVBBLHU1150 HRVBBLHU1250 HRVBBSVC1150 HRVBBSVC1200 HRVBBLVU1150 HRVBBLVU1200 HRVBBLVU1330 30 670 1,071 780 990 770 990 1,390 31 1,090 1,741 1,300 1,650 1,290 1,650 2,310 32 1,509 2,411 1,820 2,310 1,800 2,310 3,240 33 1,928 3,080 2,340 2,970 2,310 2,970 4,170 34 2,347 3,750 2,860 3,630 2,830 3,630 5,090 35 2,766 4,419 3,380 4,290 3,340 4,290 6,020 36 3,185 5,089 3,910 4,950 3,860 4,950 6,940 37 3,604 5,759 4,430 5,610 4,370 5,610 7,870 38 4,023 6,428 4,950 6,270 4,890 6,270 8,790 39 4,442 7,098 5,470 6,930 5,400 6,930 9,720 40 4,861 7,767 5,990 7,590 5,910 7,590 10,650 41 5,280 8,437 6,510 8,250 6,430 8,250 11,570 42 5,699 9,107 7,030 8,910 6,940 8,910 12,500 The cooling load chart shows loads in Btuh as well. To use the cooling load chart, first find the design enthalpy from a psychrometric chart using the design dry bulb and wet bulb temperatures. (See psychrometric chart on p. 11.) The cooling load can then be found for a range of enthalpies for each ventilator. EXAMPLE: The cooling design dry bulb temperature for Milwaukee, WI is 87°F and the average wet bulb at that temperature is 73°F. On the psychrometric chart the enthalpy is about 37.7 Btu/lb of dry air which will round up to 38 Btu/lb of dry air. In the left column, at 38 Btu/lb the HRVBBLHU1250 would have an additional cooling load of 6428 Btuh. This additional load should be taken into account when sizing the air cooling equipment. —10— PSYCHROMETRIC CHART Grains of moisturePounds of moisture 7 8 9 10 11 12 32 33 34 35 36 37 38 39 40 41 42 43 44 45 47 48 49 46 27 28 29 30 31 19 20 21 22 23 24 25 26 12 13 14 15 16 17 18 202525 30 35 40 45 50 55 60 65 70 75 80 30 35 40 85 90 95 100 105 45 50 55 60 65 70 75 80 85 90 95 100 105 Enthalpy at saturation, Btu per pound of dry air per pound of dry air 14.0 cu ft 13.5 cu ft 13.0 cu ft 12.5 cu ft 90% Relative Humidity80%70% 60% 50% 40% 30% 20% 10% -.02 BTU -.01 BTU -.02 Btu -.04 Btu -.06 Btu -.08 Btu +0.1 Btu+0.2 Btu+0.3 Btu+0.4 Btu +0.5 Btu 80%60%40%20% Btu per pound of dry air -0.3 Btu Enthalpy deviation .025.024.023.022.021.020.019.018.017.016.015.014.013.012 .95.90.85.80.75.70.65.60.55.50.45.40.35 .011.010.009.008.007.006.005.004.003.002.0010 Sensibleheatfactor 1801701601501401301201101009080706050403020100 14.5 cu ft per pound of dry air Below 32°F, properties and enthalpy deviat...

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