BaseCalc HVAC Calculator

BaseCalc HVAC Calculator is an HVAC calculator for field math, worksheets, materials, and saved calculation history. Run BTU, CFM, duct sizing, airflow, psychrometrics, manufacturer-data refrigerant checks, planning load, hydronics, and other HVAC calculator arithmetic on site, then save the result for the job.

18 CALCULATORS FOR DAILY FIELD WORK
• BTU ↔ Tons — convert between BTU/hr and refrigeration tons.
• CFM from BTU — airflow from load and temperature rise/drop.
• BTU from CFM — load from airflow and temperature difference.
• Duct Sizing — round and rectangular duct from CFM and velocity.
• Air Velocity — velocity from CFM and cross-sectional area.
• Psychrometrics — total, sensible, and latent BTU/hr estimates at standard atmospheric pressure.
• Refrigerant Lines — check entered manufacturer line data against an entered equivalent-length limit.
• Superheat / Subcooling — record the exact target supplied by the equipment manufacturer.
• Room Load — preliminary area-factor planning math using your supplied factor; not Manual J.
• Heat Pump Balance — interpolate a bracketed balance point from entered manufacturer capacity data.
• Hydronics — BTU, GPM, and ΔT relationships.
• Mixed Air — mixed-air temperature from outdoor and return air.
• Air Changes — ACH from CFM and room volume.
• Evaporative Cooling — supply temperature and sensible air-side estimate.
• Filter Velocity — filter face velocity; use manufacturer data for pressure drop.
• O₂ Excess Air — theoretical dry-flue-gas dilution estimate from measured O₂; not a safety result.
• Refrigerant Weight — additional charge from an entered manufacturer allowance and rate.
• Outdoor Airflow — breathing-zone airflow arithmetic from user-supplied per-person and per-area rates.

EVERY RESULT IS EXPLAINED
• Explicit input validation, assumptions, and calculation boundaries.
• Final arithmetic and a calculation breakdown where the supplied data supports one.
• Saved local history so you keep a job-site record.

BaseCalc HVAC is a professional reference tool. Always verify against current industry standards, manufacturer data, and local codes. The authority having jurisdiction has the final say.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/