Press Calculate.

This radiant heater calculator is designed to help visualize how evenly infrared heat is distributed across a space before installation. It estimates the radiant heat load at a grid of points throughout the room and displays the results as both a shaded heat map and a numerical table in watts per square foot.

To use the tool, enter the room dimensions, the distance from the heater face to the target plane, the number of calculation points you want across the X and Y directions, and the number and arrangement of heaters. You can select a preset Infratech heater model from the dropdown, which automatically fills in the heater’s dimensions and wattage, or choose a custom heater and enter your own values.

After clicking Calculate, the tool distributes the heaters evenly across the selected number of rows and calculates the estimated radiant contribution from each heater at every point in the grid. The colored table makes it easy to see hotter and cooler areas at a glance, while the summary section shows the minimum, maximum, average, and uniformity of the calculated heat distribution.

This tool is intended primarily for comparing heater layouts, wattages, quantities, and mounting heights. It can be especially useful for evaluating whether a larger number of lower-wattage heaters may provide more even coverage than fewer higher-wattage units.

The results are engineering estimates based on a simplified radiant heat model. Actual performance can vary based on heater reflector design, mounting angle, wind, surrounding surfaces, outdoor conditions, and other site-specific factors. Final heater selection and installation should always follow the manufacturer’s recommendations and applicable electrical and building codes.