Lennox SIGNATURE SLP99UH070XV36B, Unit Information

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BLOWER DATA
SLP99UH135XV60D BLOWER PERFORMANCE (less filter)
SINGLE SIDE RETURN AIR − Air volumes in bold require Optional Return Air Base and field fabricated transition to accommodate
20 x 25 x 1 in. air filter in order to maintain proper air velocity.
HEATING BLOWER PERFORMANCE - 0 through 0.8 in. w.g. External Static Pressure Range
Heating Adjust CFM Selections
Heating Input Range and Blower Volume - CFM
35% 40% 50% 60% 70% 80% 90% 100%
Increase (+15%) Heat CFM 927 1010 1175 1340 1505 1671 1836 2001
Increase (+7.5%) Heat CFM 844 923 1081 1239 1398 1556 1714 1873
Default Heat CFM 760 836 987 1138 1290 1441 1593 1744
Decrease (-7.5% ) Heat CFM 703 775 919 1064 1208 1352 1496 1641
Decrease (-15% ) Heat CFM 646 715 852 989 1126 1263 1400 1537
COOLING BLOWER PERFORMANCE - 0 through 1.0 in. w.g. External Static Pressure Range
Cooling Adjust CFM
Selections
Blower Speed Selections
First Stage Cool Speed - cfm Second Stage Cool Speed - cfm
Low Medium-
Low
Medium
High
High
(Default)
Low Medium-
Low
Medium
High
High
(Default)
Increase (+10%) Cool CFM 1070 1235 1385 1535 1550 1720 1925 2005
Default Cool CFM 985 1110 1245 1395 1415 1605 1755 1970
Decrease (-10%) Cool CFM 870 1010 1110 1260 1280 1435 1610 1755
The effect of static pressure is included in air volumes shown.
The following control configurations are available. See Installation Instructions for details and DIP switch settings.
Heat Modes Available (Heating Blower Performance Table):
Single stage thermostat:
- 35%, 70%, 100% input (three-stage) with time delays in-between.
Two-stage thermostat:
- Variable Rate Capacity Mode - furnace automatically adjusts firing rate based on first- and second-stage cycle times.
- W1 demand at 70% input, W2 demand at 100% input. No delay between stages.
Cool Mode Available (Cooling Blower Performance table):
First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.
Continuous Fan speeds are approximately 28% and 38% (DIP switch selectable) of the same second-stage COOL speed position.
minimum 380 cfm.
Lennox iHarmony
®
Zoning System Applications - Minimum blower speed is 450 cfm.