Nikita Klesh

Nikita Klesh builds and maintains the calculators and tables on BTU Planner. Nikita checks each formula against its source and answers the error reports.

Education

Nikita studied at the Kyiv Civil Engineering Institute (KISI). Today the school is the Kyiv National University of Construction and Architecture (KNUBA), founded in 1930. Civil engineering covers how heat, air and moisture move through a building. That is the core of every sizing question on this site.

Work on this site

• Picks the primary source for each table (ENERGY STAR, ASHRAE climate data, the 2021 IECC) and records the date it was checked.
• Writes the calculation code and the hand-worked test cases for every calculator.
• Reviews reported errors and publishes corrections with a changed date.

Elsewhere

• LinkedIn
• Facebook

Written by Nikita

• BTU calculator for cooling and heating a room
• AC size calculator
• Duct size calculator and CFM chart
• R-value chart for insulation

Contact: [email protected].