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  1. jim5b New Member

    joined: Jun 22, 2008
    19 posts
    northern MA
    I am looking at 2 enviro inserts. The ef3bi or the meridian. The first says 40,000 btu the second says 45,000. Is there a big difference. Also they dont say the come with a thermostat. Do they just run all the time?
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  2. Shane Minister of Fire

    joined: Nov 21, 2005
    1,830 posts
    Casper Wyoming
    You can put a thermostat on the Meridian and run it in on/off or hi/lo mode. I believe the EF3 can have a thermostat but it is strictly hi/low. 5k btu's is 5k btu's. I'd start by figuring out how many btu you need to heat the area you want to heat.
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