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1

Home Made / Re: Door Insulation

« on: February 21, 2013, 01:58:50 PM »

I used ceramic blanket insulation.

2

General Outdoor Furnace Discussion / Re: Heat exchangers

« on: February 13, 2013, 11:59:59 AM »

i didn't meet my flanges in the middle scott, i set one up against teh other so i only have the thickness of 1 flange. so i have three flanges..one on each side and one in the middle that was the way i could do it to get the least "restriction" due to the flanges

I see


I'm just not convinced a little bit of restriction amounts to much...

In heating, restrictions do not mean a whole lot, during heating the fan is run on medium speed unless heat source is a heat pump. Air conditioning and using heat pumps is where too much restrictions can cause problems. Coil flanges will make no difference in the operation of the original equipment, they wont cause enough restriction. HVAC systems should be designed off the cooling load. Its easier to heat a home than it is to cool it.

3

Central Boiler / Re: frequent burn cycles???

« on: February 12, 2013, 12:00:36 PM »

Im no expert but do commercial HVAC by trade. I feel your delta T is high. I like to keep mine at 15-20*F and never let return temps get below 140 to prevent firebox condensation. You need more GPM in my opinion. Yes you wouldn't be pulling as Much btu from the boiler but you will be saving the thing from corrosion. Possibility you have terrible water and stuff is getting plugged up?

4

Home Made / Re: New Build, pics and questions

« on: February 12, 2013, 08:42:35 AM »

Thanks,  I thought the insulation around the door was some sort of commercial type.  I wish I could find something like that for the front of mine.

Its ceramic fiber blanket rated at 2300*F. best price I found on the net which is actually cheaper than what I paid is here
http://www.ceramaterials.com/ceramicfiberblanket.html
I paid $7 a sq.ft. I got 12 sq.ft. with those prices on that site I may wrap my entire boiler in the 2" thick 48" wide  commercial grade stuff. Its some extremely dense stuff.

5

Home Made / Re: New Build, pics and questions

« on: February 11, 2013, 04:54:08 PM »

What is that you used for insulation and what is your outer tank.  What did you do to finish the outside?

for tank insulation I just used r19 house insulation. Around the flue pipe and on the front plate I used some high temp commercial boiler insulation. I do commercial HVAC so i can get my hands on it. Its a real dense fiberglass/ceramic insulation. The outer tank is a 500 gallon propane tank and the firebox is a 300 gallon propane tank. I haven't  finished the outside Sheet metal yet. The boiler sits in my old 20x30 garage with 9 cord of wood so its out of the weather. I wanted to burn it this year unfinished so repairs/modificationa can be made easily in spring time if need be.

6

Home Made / Re: New Build, pics and questions

« on: February 06, 2013, 03:27:23 PM »

looks great, i havent started a thread yet but your build is almost identical to mine. it will work good for you as mine does for me. been burning for almost a month and works great. get easy 16 hr burn times @ 10*F and heat my domestic with a home built sidearm. i wont hijack your thread with details and will start my own soon but if you want to know anything else just ask.


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7

Home Made / Re: starting a build i have lots of questions

« on: January 05, 2013, 07:24:19 AM »

any updates

8

Home Made / Re: My friends boiler build started

« on: December 31, 2012, 12:33:29 PM »

any updates, how did you construct the door?