Agaricus bisporus indoor bedstead type two times fermentation temperature measurement, is a good temperature test or measurement of space temperature is good
The fermentation temperature should be checked for stack temperature. Not the space temperature.
The temperature of the space can be referenced, and the average temperature of the medium will be 2 to 5 degrees higher than the space temperature. Mulch can even be about 8 degrees high.
Accurately, it should be to measure the temperature of the culture substrate, but in the mushroom house with better thermal insulation