Building Systems
Radiators, lighting, ventilation, heating, air conditioning and floor screed calculators
Floor Screed Calculator
Estimate floor screed volume, cement, sharp sand, ready-mix weight, waste allowance and bag counts from area and thickness.
Radiator Size Calculator
Estimate room radiator output in BTU/hr and watts, then calculate radiator sections or panel radiators from the rated output.
Room Lighting Calculator
Estimate room lighting needs from square footage, target foot-candles or lux, lumens per bulb, ceiling height and maintenance factors.
Ventilation Calculator
Calculate room ventilation airflow in CFM, air changes per hour (ACH), current ACH and a rough round duct diameter from room volume.
Heating BTU Calculator
Estimate residential heating output in BTU/hr and rough furnace input size from square footage, climate, insulation, windows and AFUE.
Air Conditioner BTU Calculator
Estimate room air conditioner size in BTU/hr from square footage, ceiling height, sun exposure, insulation, occupants and equipment heat.