clearance to combustibles

I think the rear clearance is in part to provide room to clean the boiler.

Don't forget that it also needs 36" top clearance. There was no mention of this in the owners manual, just on the ul tag.

I have substantially less than 36" behind my EKO. However, my boiler room wall is concrete.

I probably have 18" from the back of my boiler to the concrete wall. I wish I had more room to be honest. But based on my layout I couldn't really justify moving the boiler further outl. I'd say 18" is the bare minimum. Personally, if it's a combustible wall I wouldn't go closer than the recommended clearance due to insurance reasons.

when you say combustible wall do you mean exposed wood studs?

If so, just cover it with 5/8" fire rated sheetrock one layer will be fine two will be better.

infinitymike said:

when you say combustible wall do you mean exposed wood studs?

If so, just cover it with 5/8" fire rated sheetrock one layer will be fine two will be better.

Click to expand...

That would not be a code approved way to reduce the clearances to combustibles.

I just went through this whole thing actually... Still working on it (Ill have pictures to show later!)

Two sheets of fire code sheet rock (on 2x8 studs) provides a 1 hour fire rating, but isnt necessarily a reduction in clearance to combustibles. It depends on your local code, but I followed this : http://publicecodes.citation.com/st/ny/st/b1100v10/st_ny_st_b1100v10_3_sec008_par005.htm Thats for NYS, so YMMV.

I used the sheetmetal held off of the two layers of sheetrock with fencepost insulators (Thanks for the idea Mr. Dudley!) and that technically cuts my clearances in half. If you are reducing vertical clearances, you can reduce it to 1/3rd.

All of this is subject to your local code guy and your insurance company, so please use the appropriate grains of salt!