Sensible Heat Ratio (SHR) for HVAC Cooling Coil Selection: Equipment Matching, Climate Variations, and Humidity Control Design

SHR Determines Coil Row Depth: Why Equipment SHR Must Match Building Load SHR

Sensible heat ratio (SHR) determines cooling coil selection per ACCA Manual S 2014 Section 2.5. Equipment SHR at design conditions must match building load SHR within ±0.05 to deliver both sensible cooling and latent dehumidification per ANSI/ACCA 5 QI-2015 Quality Installation Standard. The SHR formula per ASHRAE Fundamentals 2021 Chapter 18:

SHR = Q_sensible / Q_total = Q_sensible / (Q_sensible + Q_latent)

where Q_sensible captures temperature change (BTU/hr or W) and Q_latent captures moisture removal (BTU/hr or W). SHR ranges from 0.0 (pure latent, evaporative cooler) to 1.0 (pure sensible, dry-coil cooling without dehumidification).

When equipment SHR exceeds building SHR by more than 0.05, the system overcools without removing sufficient moisture. Indoor relative humidity rises above 60% per ASHRAE Standard 55-2023 Section 5.2.4 comfort criteria, producing "cold and clammy" sensation despite adequate dry-bulb temperature. When equipment SHR falls below building SHR by more than 0.05, over-dehumidification wastes capacity. Per HVAC-Talk thread 140976 senior technician commentary, oversized AC running at SHR 0.70 in a low-latent space wastes 20-30% of cooling capacity on unnecessary moisture removal. This calculator computes SHR directly from Manual J output and feeds the Manual S 2014 Section 2.5 equipment selection procedure.

Calculator Inputs: Sensible Load and Latent Load → SHR Output and Total Cooling

The Sensible Heat Ratio Calculator takes two inputs from Manual J Form J1 worksheet output: sensible cooling load and latent cooling load. Both accept BTU/hr or kW per AHRI Standard 210/240-2023 dual-unit capacity rating.

Input 1: Sensible Cooling Load (BTU/hr or kW), from Manual J Form J1 or AC Tonnage Calculator output. Typical residential range: 18,000-50,000 BTU/hr (5.3-14.6 kW).

Input 2: Latent Cooling Load (BTU/hr or kW), from Manual J Worksheets E (infiltration latent) + F (internal latent) + H (ventilation latent) summed. Typical range: 3,000-15,000 BTU/hr (0.88-4.4 kW) in moderate climates; 8,000-25,000 BTU/hr (2.34-7.32 kW) in humid climates.

Calculator outputs:

SHR = Q_sensible / (Q_sensible + Q_latent) [dimensionless, 0.50-1.00]
Q_total = Q_sensible + Q_latent [BTU/hr or kW]
Sensible % = SHR × 100
Latent % = (1 - SHR) × 100

Variable definitions with typical ranges:
- Q_sensible: 18,000-50,000 BTU/hr (5.3-14.6 kW), residential typical
- Q_latent: 3,000-25,000 BTU/hr (0.88-7.32 kW), 0.50 at pool/natatorium to 0.95-1.00 at data centers
- Q_total: 25,000-75,000 BTU/hr (7.3-22 kW), residential typical

Conversion factors: 1 W = 3.412 BTU/hr; 1 kW = 3,412 BTU/hr per NIST conversion; 1 ton refrigeration = 12,000 BTU/hr = 3.517 kW per ARI/AHRI definition.

Engineering position within the Heat Load cluster: AC Tonnage estimates whole-house load (rule-of-thumb, building-level); HVAC Heat Load computes single-component load using Q = A × U × ΔT (component-level foundation of Manual J); Heat Pump Size selects equipment given load (Manual S workflow). SHR Calculator bridges load calculation and equipment selection, computing the sensible-latent ratio that drives coil row depth selection per Manual S 2014 Section 2.5.

Per Carrier eDesign Suite Volume 5 Issue 1 methodology, SHR calculation precedes equipment selection. The equipment Apparatus Dew Point (ADP) line on the psychrometric chart per ASHRAE Fundamentals 2021 Chapter 18 Figure 18-3 must align with the building load SHR line. Standard residential cooling targets a 55°F (12.8°C) supply air temperature (SAT); SHR mismatch requires SAT adjustment toward 57-60°F (13.9-15.6°C) for better humidity control.

SHR Ranges by Application: Comfort Cooling 0.75-0.85, Humid Climate 0.65-0.70, Data Center 0.95-1.00

SHR varies dramatically by application. Equipment selected for one application performs poorly in another, making SHR matching mandatory per ACCA Manual S 2014 and AHRI Standard 210/240-2023 commentary.

Application	Typical SHR	Notes
Data center / Precision cooling	0.95-1.00	Server heat is pure sensible; no occupant moisture
Office building (dry climate)	0.85-0.92	Phoenix, Denver, low occupant density
Residential (moderate climate)	0.75-0.85	Atlanta, Memphis, typical
Residential (humid climate)	0.65-0.75	Houston, Miami, Gulf Coast
Restaurant / Food service	0.55-0.70	Cooking moisture + high occupancy
Pool / Natatorium	0.50-0.60	Evaporation from water surface
Outdoor air-dominant	0.40-0.55	DOAS, ERV pre-conditioning

Climate-driven SHR variations per HVAC-Talk forum thread 140976 senior technician commentary:

Phoenix (arid Zone 2B): outdoor 1% design 110°F dry-bulb / 71°F wet-bulb (43.3°C / 21.7°C). Outdoor dew point approximately 50°F (10°C). At or below that indoor dew point: 100% sensible cooling unless coil temperature drops below 50°F (10°C). Building SHR runs 0.85-0.92.

Houston (humid Zone 2A): outdoor 1% design 96°F dry-bulb / 79°F wet-bulb (35.6°C / 26.1°C). Outdoor dew point 75°F (23.9°C). High latent infiltration and ventilation loading drives building SHR to 0.65-0.75. Per Energy Vanguard analysis, "green grass climate" requires coil temperature of 40-43°F (4.4-6.1°C) to achieve a 70/30 sensible-to-latent split.

Atlanta (mixed-humid Zone 3A): outdoor 1% design 92°F dry-bulb / 74°F wet-bulb (33.3°C / 23.3°C). Outdoor dew point 67°F (19.4°C). Intermediate SHR 0.75-0.82.

Data centers: per ASHRAE TC 9.9, recommended supply air at 64.4-80.6°F (18-27°C), dew point 16.8-59.0°F (-8.4-15°C). Server racks dissipate 100% sensible heat per IT equipment specification. Building SHR ≈ 1.0; precision cooling equipment SHR must match.

Per Carrier eDesign Suite commentary, equipment rated at AHRI conditions (SHR approximately 0.75) selected for a Houston design (building SHR 0.68) fails dehumidification despite adequate total capacity. The SHR mismatch of 0.07 exceeds Manual S ±0.05 tolerance, creating "cold and clammy" complaints typical in humid climates per The Furnace Outlet residential HVAC analysis.

Equipment SHR at AHRI 210/240 Rating Conditions vs Design Conditions

Equipment SHR rated at AHRI Standard 210/240-2023 nominal conditions (80°F / 26.7°C indoor dry-bulb, 67°F / 19.4°C indoor wet-bulb, 95°F / 35°C outdoor) differs from SHR at actual project design conditions per Carrier eDesign Suite Volume 5 Issue 1 methodology. The AHRI nominal indoor return is approximately 50% RH, airflow 350-450 CFM per ton typical residential. Equipment SHR at AHRI nominal: 0.72-0.80 typical residential per AHRI Directory of Certified Product Performance.

Manual S design conditions per ACCA Manual S 2014 Section 1.3:
- Outdoor: ASHRAE 1% summer dry-bulb / 1% MCWB per ASHRAE Fundamentals 2021 Chapter 14
- Indoor return: 75°F (24°C) dry-bulb per ASHRAE Standard 55-2023 Section 5.2.4
- Indoor wet-bulb at return: 62-65°F (16.7-18.3°C) typical at 75°F / 50% RH

Equipment SHR shift at Manual S design conditions:

Condition	Indoor DB / WB	Outdoor DB	Equipment SHR	Sensible Capacity
AHRI nominal	80°F / 67°F (26.7°C / 19.4°C)	95°F (35°C)	0.75	100% rated
Atlanta design	75°F / 63°F (24°C / 17.2°C)	92°F (33.3°C)	0.80	95-97% rated
Houston design	75°F / 63°F (24°C / 17.2°C)	96°F (35.6°C)	0.78	93-95% rated
Miami design	75°F / 64°F (24°C / 17.8°C)	92°F (33.3°C)	0.74	92-94% rated

Per Manual S Section 2.5, three-criterion equipment match required: (1) total capacity at design conditions within 90-115% of Manual J total load; (2) sensible capacity at design conditions within 90-115% of Manual J sensible load; (3) latent capacity at design conditions matched to design SHR within ±0.05.

Per Carrier eDesign Suite methodology, manufacturer Expanded Performance Data (EPD) sheets report capacity at multiple indoor wet-bulb temperatures (62°F, 63°F, 65°F, 67°F / 16.7°C, 17.2°C, 18.3°C, 19.4°C) and outdoor dry-bulb temperatures (75°F, 85°F, 95°F, 105°F / 23.9°C, 29.4°C, 35°C, 40.6°C) per AHRI Standard 210/240-2023 extended testing protocol. CFM per ton effect: lower CFM per ton (350 vs 400) increases moisture removal (lower SHR); higher CFM per ton (450 vs 400) increases sensible capacity (higher SHR).

Houston Humid Climate Coil Selection: Building SHR 0.68 Demands 6-Row Coil at 400 CFM/Ton

Project: 2,400 sq ft (223 m²) new construction home in Houston, TX (ASHRAE Climate Zone 2A). IECC 2021 envelope: R-13 walls + R-5 continuous insulation, R-38 attic, Low-E argon windows. Blower-door verified at 3.5 ACH50.

Design conditions per ASHRAE Fundamentals 2021 Chapter 14 (Houston George Bush Intercontinental Airport, Station 722430): 1% summer design 96°F dry-bulb / 79°F wet-bulb (35.6°C / 26.1°C). Indoor cooling design: 75°F (24°C), 50% RH per ASHRAE Standard 55-2023 Section 5.2.4. Indoor wet-bulb at return: 63°F (17.2°C). Design ΔT cooling: 21°F (11.7°C).

Step 1: Manual J 8th Edition results per ACCA Manual J Form J1 (commissioned $400 calculation):

Sensible cooling load: 28,500 BTU/hr (8.35 kW)
- Envelope conduction: 5,200 BTU/hr (1.52 kW)
- Fenestration solar + conduction: 11,800 BTU/hr (3.46 kW)
- Infiltration sensible: 2,100 BTU/hr (0.62 kW)
- Ventilation sensible: 2,400 BTU/hr (0.70 kW)
- Internal sensible: 6,300 BTU/hr (1.85 kW)
- Duct sensible (conditioned-space): 700 BTU/hr (0.21 kW)

Latent cooling load: 13,400 BTU/hr (3.93 kW)
- Infiltration latent (ΔW = 64 gr/lb, 60 CFM): 0.68 × 60 × 64 = 2,611 BTU/hr (0.77 kW)
- Ventilation latent (84 CFM, ΔW = 64 gr/lb): 0.68 × 84 × 64 = 3,656 BTU/hr (1.07 kW)
- Occupant latent (4 occupants × 200 BTU/hr each): 800 BTU/hr (0.23 kW)
- Cooking and laundry moisture: 2,400 BTU/hr (0.70 kW)
- Outdoor air infiltration peak hours: 3,933 BTU/hr (1.15 kW)

Total cooling load: 28,500 + 13,400 = 41,900 BTU/hr (12.28 kW) ≈ 3.49 tons

Step 2: SHR calculation

SHR = 28,500 / 41,900 = 0.680

Per HVAC Formula ranges, SHR 0.68 sits at the humid climate priority boundary. Latent load at 32% of total demands equipment SHR ≤ 0.73 per Manual S ±0.05 matching tolerance.

Step 3: Equipment selection per Manual S 2014 Section 2.5

Option A: 3.5-Ton conventional 4-row coil at 400 CFM/ton
AHRI nominal: 42,000 BTU/hr (12.30 kW) total, 31,000 BTU/hr (9.08 kW) sensible, SHR 0.74
Houston design conditions: total ~40,000 BTU/hr (11.72 kW), sensible ~29,500 BTU/hr (8.65 kW), latent 10,500 BTU/hr (3.08 kW)
Match against building load: total 95% (within QI range), sensible 104% (within range), latent 78% (shortfall)
Result: latent criterion fails per Manual S Section 2.5. Indoor RH rises to 58-62% per Carrier eDesign analysis. "Cold and clammy" complaint expected.

Option B: 3.5-Ton variable-speed 6-row coil at 350 CFM/ton
AHRI nominal: 42,000 BTU/hr (12.30 kW) total, 30,000 BTU/hr (8.79 kW) sensible, SHR 0.71
Houston design conditions at 350 CFM/ton: total ~41,500 BTU/hr (12.17 kW), sensible ~28,800 BTU/hr (8.44 kW), latent ~12,700 BTU/hr (3.72 kW)
Match: total 99%, sensible 101%, latent 95% — all three Manual S criteria satisfied within ±10%.
Variable-speed turn-down: 350 CFM/ton at full speed; 250 CFM/ton at minimum (60% capacity), boosting moisture removal during low-load conditions per HVAC-Talk thread 2286807.

Option C: 3-Ton (36,000 BTU/hr / 10.55 kW) + dedicated whole-house dehumidifier (Aprilaire 1850, 95 pints/day)
Capital cost: $9,000 (AC) + $1,800 (dehumidifier) = $10,800 total. Dehumidifier operates independently during spring/fall shoulder seasons per The Furnace Outlet recommendation.

Step 4: Engineering decision

Selected design: Option B (3.5-Ton variable-speed, 6-row coil, 350 CFM/ton). Specification: 42,000 BTU/hr (12.30 kW) nominal at AHRI conditions; SHR 0.71 at Houston design; SEER2 ≥ 16.0; variable-speed turn-down 2.5:1 minimum per AHRI 210/240-2023 IEER methodology. Cooling capacity: 99% of 41,900 BTU/hr building load, satisfying ACCA QI compliance. Cost premium over single-stage: $4,000 ($11,500 vs $7,500 total); IRA Section 25C $600 federal tax credit (ENERGY STAR Most Efficient, SEER2 ≥ 16.0) offsets first-year difference. 15-year lifecycle advantage: proper humidity control eliminates mold/mildew remediation cost of $2,000-5,000 per The Furnace Outlet residential HVAC analysis.

Variable-Speed Equipment SHR Adjustment: Airflow Modulation from 250 to 450 CFM/Ton

Variable-speed equipment per AHRI Standard 210/240-2023 modulates compressor speed and blower airflow simultaneously, enabling SHR adjustment from approximately 0.65 (high latent removal, low airflow) to 0.95 (high sensible, high airflow) per HVAC-Talk thread 2286807 analysis.

CFM per ton effect on coil performance per Carrier eDesign Suite Volume 5 Issue 1:

CFM/Ton	Coil Temperature	SHR	Sensible Capacity	Application
250	38-42°F (3.3-5.6°C)	0.55-0.65	80-85% rated	Dehumidification priority
300	40-44°F (4.4-6.7°C)	0.65-0.72	88-92% rated	Humid climate
350	42-46°F (5.6-7.8°C)	0.70-0.78	92-96% rated	Standard residential humid
400	44-48°F (6.7-8.9°C)	0.75-0.82	96-100% rated	Standard residential moderate
450	46-50°F (7.8-10°C)	0.80-0.88	100-104% rated	Dry climate / sensible priority
500+	48-52°F (8.9-11.1°C)	0.85-1.00	104-108% rated	Data center precision

Per Carrier eDesign Volume 5 Issue 1: at 278 CFM/ton (below the 300 CFM/ton minimum), a computed SHR of 0.73 indicates the coil is removing moisture beyond the building's actual latent load requirement, wasting capacity. Standard residential range 350-450 CFM/ton per Manual D Section 5; outside this range, investigate static pressure via Manual D friction loss analysis or re-select equipment.

Critical behavior per HVAC-Talk thread 2286807: at minimum compressor speed (typically 30-40% of rated capacity), coil temperature may rise above the indoor dew point and no moisture removal occurs, with SHR approaching 1.0. Per the same thread: "That is why oversizing is still a problem even with inverters. At a low ramp many of them have SHRs well above 0.80." Variable-speed equipment expands the operating envelope but does not eliminate the fundamental SHR matching requirement per Manual S 2014.

Per Trane XV20i technical documentation, the unit modulates compressor 30-100% and blower 30-100% based on combined thermostat and humidistat calls, maintaining 50% RH ±5% across the full load range. When shoulder-season outdoor temperature drops below 80°F (26.7°C), configuring a dedicated dehumidifier mode below that threshold avoids the minimum-speed SHR problem per Energy Vanguard humid-climate design recommendation.

Supplemental Dehumidification: When Coil-Only SHR Cannot Meet Building Load

When building SHR falls below 0.65 (heavily humid climate, high-occupancy space, pool/natatorium), single-stage cooling alone cannot match building SHR without compromising sensible capacity. Supplemental dehumidification per The Furnace Outlet residential HVAC analysis becomes the appropriate design approach.

Option 1: Whole-House Dehumidifier (Aprilaire 1850, Honeywell DR65, Santa Fe Ultra series)
Capacity: 65-95 pints/day (30-43 L/day) residential typical. Integrated to return duct; drains per IRC M1411. Operates independently via dedicated humidistat at 50% RH setpoint. Cost: $1,500-3,000 equipment + $500-1,000 installation. Energy: 4-6 amps at 120V or 240V per AHRI Standard 851-2008. Engineering advantage: maintains humidity control independently during spring/fall shoulder seasons when the AC compressor is off.

Option 2: Hot-Gas Reheat (HGR)
Re-heats supply air after the dehumidification coil, allowing coil temperature of 35-40°F (1.7-4.4°C) for maximum moisture removal without overcooling the conditioned space. Built into specific residential equipment (Carrier 38MV Cor, Lennox SL series). Energy penalty: 10-15% additional compressor capacity per AHRI Standard 210/240-2023 commentary. Cost premium: $1,500-2,500 vs standard equipment.

Option 3: Enhanced Dehumidification Modes on Variable-Speed Equipment
Available on variable-speed mini-splits (Mitsubishi, Daikin, Fujitsu) with dedicated "Dry" or "Dehumidify" operating mode. Drives coil below normal operating temperature. Energy: 5-10% efficiency premium per Daikin technical documentation. Requires variable-speed compressor; single-stage equipment cannot replicate this behavior.

Option 4: Desiccant Dehumidification (Industrial / Commercial)
Active desiccant wheel (silica gel, zeolite) absorbs moisture without cooling. Documented in ASHRAE Handbook HVAC Systems 2024 Chapter 24. Cost: $5,000-15,000 equipment; requires a regeneration heat source. Used in pool/natatorium and commercial applications where building SHR falls below 0.50.

Per HVAC-Talk thread 140976 consensus: for residential humid climate with building SHR below 0.65, a dedicated whole-house dehumidifier delivers better humidity control than coil-only adjustment. Operating cost approximately $30-60/year per Aprilaire 1850 technical data. Combining right-sized variable-speed AC with a supplemental dehumidifier provides adequate dehumidification across all operating modes, and that dollar spent on proper humidity design is more effective than oversized AC alone per Energy Vanguard analysis.

Equipment Selection Failure Modes: 'Cold and Clammy' Diagnosis and Remedy

Failure Mode 1: AC oversized with standard 400 CFM/ton airflow
Symptom: indoor temperature 72°F (22°C) but RH at 65%. Cause: oversized equipment cycles off before the evaporator coil reaches indoor dew point per HVAC-Talk thread 140976. Cycle time under 8 minutes, below the 10-20 minute properly-sized range per ASHRAE Standard 55-2023. Remedy: downsize per Manual J + Manual S; reduce airflow to 350 CFM/ton; or add supplemental dehumidifier per Option 1 above.

Failure Mode 2: Equipment SHR exceeds building SHR by more than 0.10
Symptom: humidity creeps upward during peak cooling (afternoon to evening transition). Cause: equipment removes sensible heat quickly, leaving latent load untreated. Indoor RH measures 55-65% at 75°F (24°C) setpoint vs target 45-50%. Remedy: replace equipment with lower SHR rating per Manual S Section 2.5; reduce airflow to 300-350 CFM/ton; or add hot-gas reheat.

Failure Mode 3: Variable-speed equipment running at minimum compressor speed
Symptom: RH rises during mild outdoor conditions, 75-85°F (24-29°C) outdoor dry-bulb. Cause: per HVAC-Talk thread 2286807, "On the minimum run setting the sensible heat ratio is 1.0" — coil temperature rises above indoor dew point, no condensation occurs. Remedy: configure outdoor temperature lockout to a dedicated dehumidifier mode below 80°F (26.7°C) outdoor; or override compressor to staged operation.

Failure Mode 4: Duct leakage in unconditioned attic
Symptom: RH at 60% despite right-sized equipment. Cause: duct supply leakage draws humid outdoor air into the return per Manual J Appendix 14. Diagnosis: duct blaster test per ACCA Standard 5 QI-2015 Section 4.4 reveals more than 4 CFM25 per 100 sq ft (9.3 m²) conditioned floor area. Remedy: duct sealing per IRC Section M1601.4.1; or relocate ducts to conditioned space.

Failure Mode 5: Equipment SHR below building SHR (over-dehumidification)
Symptom: indoor RH 35-40%, wood floor cracking, elevated static electricity. Cause: humid-climate SHR equipment installed in a moderate or dry climate. Per HVAC-Talk thread 140976: "less than 0.7 SHR equipment is for dehumidifiers with reheat" — overspec'd for the application. Remedy: replace with higher-SHR equipment matched to actual building load (0.75-0.85); or add humidification per ASHRAE Standard 55-2023 Section 5.2.4 lower RH limit of 30%.

Application note: SHR analysis applies to Manual J-verified design loads with separated sensible and latent calculations. Below 15,000 BTU/hr (4.4 kW) total load, consider ductless mini-split with inherent SHR control per ASHRAE Handbook HVAC Systems 2024 Chapter 49. Above 60,000 BTU/hr (17.6 kW), multi-stage equipment with zone-by-zone SHR matching per Manual J room-by-room methodology is more appropriate.

Application Boundaries: Modified SHR for Outdoor Air Loading and Non-Standard Conditions

The calculator SHR methodology applies directly to single-zone residential cooling with known sensible and latent loads from Manual J, supporting equipment selection per Manual S 2014 standard procedure. The following conditions require extended analysis:

(1) Outdoor air pre-conditioning (DOAS systems): outdoor air load typically SHR 0.40-0.55 per ASHRAE Standard 62.1-2022 Section 6.1.4. Mixed-air SHR is the weighted average of outdoor and recirculated indoor streams per ASHRAE Fundamentals 2021 Chapter 18 mixing equation.

(2) Energy recovery ventilator (ERV) installations: ERV recovers 60-80% of sensible and 50-75% of latent load per AHRI Standard 1060-2018 testing. Modified building SHR after ERV recovery: typically 0.70-0.78 effective for the HVAC system, not the raw outdoor air SHR.

(3) Variable-occupancy spaces (assembly halls, restaurants, classrooms): SHR varies from 0.55-0.65 at peak occupancy to 0.85-0.92 at off-peak per ASHRAE Fundamentals 2021 Chapter 18 Table 1. Equipment selection per Manual S to the highest-load condition; variable-speed turn-down handles part-load.

(4) High air-leakage envelopes above 7 ACH50: infiltration latent load may exceed conduction sensible load in humid climates, dropping building SHR to 0.55-0.65. Air sealing per IRC Section R402.4 raises building SHR back toward the 0.75-0.85 standard residential range.

(5) Commercial kitchens: per ASHRAE Standard 154-2016 Section 5.1, hood exhaust removes 200-400 CFM per linear foot (0.31-0.62 m³/s per meter) of hood. Building SHR typically 0.55-0.65 due to cooking moisture; standard residential SHR analysis is inadequate.

(6) Pool/natatorium applications: per Manual J Section 5-15, pool evaporation latent load is 1.5-3× sensible load. Building SHR 0.30-0.50; requires desiccant dehumidification per ASHRAE Handbook HVAC Systems 2024 Chapter 24.

Per ACCA Manual S 2014 Section 1.3: full Manual J methodology with separated sensible and latent calculation is the prerequisite for accurate SHR-based equipment selection. ACCA-approved software (Wrightsoft RightSuite Universal, Elite Software RHVAC, Cool Calc Manual J) automates the methodology and delivers separated sensible/latent loads ready for SHR calculation and Manual S matching.

Sensible Heat Ratio Calculator

Sensible heat ratio (SHR) calculation from sensible and latent cooling load with total cooling and percentage split output, supporting equipment SHR matching per ACCA Manual S 2014 Section 2.5 within ±0.05 building load tolerance, and dual-unit input (BTU/hr or kW) per AHRI Standard 210/240-2023 capacity rating methodology, available in the Sensible Heat Ratio Calculator.

FAQ

Related Calculators

Rule-of-thumb cooling load estimation per ACCA Manual J reference data using climate factor methodology: AC Tonnage Calculator. Heat pump equipment selection given design load with balance point analysis per ACCA Manual S 2014: Heat Pump Size Calculator.

Full residential cooling and heating load with component breakdown (envelope + internal + infiltration + ventilation) per ACCA Manual J 8th Edition: HVAC Heat Load Calculator. Latent cooling load for dehumidification system sizing per ASHRAE Standard 62.2-2022 outdoor air requirements: Latent Heat Load Calculator.

Cooling coil capacity calculation for air-side and water-side cooling systems per AHRI Standard 410-2001: Coil Capacity Calculator. Required supply airflow per ACCA Manual D 2nd Edition Residential Duct Systems: CFM Calculator. Complete psychrometric properties (humidity ratio, dew point, vapor pressure, enthalpy) for SHR analysis context: Psychrometric Calculator.