BTU Calculator

Step 1 Choose and enter shape dimensions or enter a volume:

Select Shape

Set Room Dimensions

ft

ft

ft

Volume

ft3

Step 2 Choose the option that best describes your enclosure:

Very Loose

Tight roof, sheet plastic or canvas walls - space is clear of significant partitioning

Loose

Tight roof and nearly completed walls; door, window and other openings covered with plastic or canvas - heavy partitioning

Fairly Loose

Tight roof and nearly completed walls; door, window and other openings covered with plastic or canvas - medium partitioning

Fairly tight

Tight roof and completed walls without insulation, window and door openings enclosed with canvas or plastic - medium to heavy partitioning

Tight

Windows, doors, and elevators installed, walls exist (not dry-walled) - medium partitioning

Very Tight

Windows, doors, and elevators installed, walls exist (not drywalled) - no partitioning

Step 3 Choose desired temperature rise:

Step 4 Choose a heating unit:

Result

1 (1.00) IDF 200 Oil/Diesel (220,000 BTU) heating units required
for 14.137ft3
using a total of 112 BTUs.