How can you heat a room to 135 degrees?

To heat a room to 135 degrees, a person would probably need several industrial heaters. However, heating a room up to this temperature could be incredibly dangerous as it can damage senstive technology and could be harmful to a person's health if they stay in the room for too long.
To heat a room you can use a heater, fire or candles. To achieve the heat of 135 degrees a sauna might be the best room to use the steam and heat of a sauna can reach those temperatures.