mobile heater

not a proper diy question but i have a 3m x 6m marquee tent, plastic type which i am utilising on new years eve i want to provide heat inside which will be good enough, but not to much to turn it into a hot air ballon. anyone had any similar experiences good or bad please let me know.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.