Quick Load Estimator - J∆S Engineering

Note: These are preliminary estimates only. For accurate load calculations, use the full J∆S Engineering Suite with detailed building analysis per ASHRAE methodology.

Building Information

Basic Parameters

Building Type

Floor Area (SF)

Ceiling Height (ft)

Number of Stories

Window-to-Wall Ratio (%)

Climate & Construction

ASHRAE Climate Zone

Construction Quality

Primary Exposure

Internal Loads

Occupancy (SF/person)

Lighting (W/SF)

Equipment (W/SF)

Operating Hours/Day

Load Estimates

Peak Cooling Load

Tons

-- BTU/hr

Peak Heating Load

MBH

-- BTU/hr

Cooling Intensity -- BTU/hr/SF

Heating Intensity -- BTU/hr/SF

Estimated Airflow -- CFM

CFM per Ton -- CFM/ton

Load Breakdown (Cooling)

Envelope

Lighting

Equipment

People

Ventilation

Envelope: 0%

Lighting: 0%

Equipment: 0%

People: 0%

Ventilation: 0%

Equipment Suggestions

Enter building parameters and calculate to see suggestions

Rule-of-Thumb Reference

Cooling Load Factors (BTU/hr/SF)

Building Type	Low	Typical	High
Office	25	35	50
Retail	30	45	65
Restaurant	50	75	120
School	30	40	55
Healthcare	35	50	80
Data Center	150	250	400+

Heating Load Factors (BTU/hr/SF)

Climate Zone	Average	Well-Insulated
1-2 (Hot)	10-15	5-10
3-4 (Mixed)	20-30	15-20
5-6 (Cold)	35-50	25-35
7-8 (Very Cold)	50-70	35-50