A local company makes SIPS panels so it's likely my house walls would be either 6 5/8" SIPS panel or a 8 3/8" panel (R23 and R29 respectively). Roof SIPS will be 12 3/8" or R45-50 (depending on who's charts you look at).
The question really is this; when going through Yasin's formula Q = G*V*DT with Q being the heat losses (W), G being the insulation factor, V the volume of the house (m3), and DT the required difference of temperature between the exterior and the interior (°C) Is there a factor or conversion to translate R-values to his "classical values"? (listed below)
- 1.8 for an old, leaky, stone and clay mortar house (classical french farmhouses) - 1.6 for a house in bricks, stones or breeze blocks without insulation - 1.4 for a house insulated with 4 cm of polystyrene - 1.2 for a house insulated with 10 cm of polystyrene - 0.8 for a recent house with 37 cm thick insulating clay bricks for example - 0.5 for a strawbale house for example
If I just missed it somewhere on the forums here can someone point the new guy to that thread? Thanks!
Post by Dan (Upstate NY, USA) on Apr 5, 2019 4:47:58 GMT -8
R value is one thing, you can have walls with an R-value of R40 and R60 roof, but if it leaks air those extreme insulating values mean nothing.
I have a very tight house (tested by New York State taxpayer's money) with all but one wall at R40 and the whole roof at R60.
As I have upgraded the house over the years I noticed the law of diminishing returns when it came to R value. When making the house more air tight had a much larger effect on wood usage.
When I had the house tested I was told to not make it anymore air tight or it would become unhealthy. So I made an heat exchanger that used stove exhaust air to preheat incoming air and closed some other gaps in the house.
Sometimes this is too little fresh air makeup since if I turn on the cooking stove exhaust fan, with the dryer running it can suck the rocket mass heater backwards when its not running...!
TexasGonzo: Sooooo glad I found this site! Its always rewarding to find such a super group of folks! To any and all, feel free to PM me anytime. Thanks for having me!
Mar 11, 2019 18:56:41 GMT -8
jlmtech: GADGET: CONSIDER USING A JET PUMP INSTEAD OF A BLOWER FAN TO INDUCE DRAFT; NO CLOGGING.
Mar 26, 2019 8:19:28 GMT -8
michaelegan: i am unable to open the sketchup files on my mac. I used sketchup a few years back but apparently the company now requires a subscription. does anyone have any advice/instructions on how to use the program or how to view pictures without spending money?
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mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
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topbaza: hi everyone, been searching all over net and this is were i need to be i think!!
Sept 28, 2019 6:16:25 GMT -8
anounaki: Hi, why I cant upload photos when I make new tread to this forum?
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ahansen: photos under 1 mb not possible?
Jun 4, 2020 0:09:21 GMT -8
belgiangulch: Photo's are possible. They must be downloaded elsewhere and the image url (adress) is copyied.
Sept 14, 2020 7:26:15 GMT -8
belgiangulch: While creating a thread click on the small picture in the banner above the reply. A box pops up, paste the image url in the box. Pay no attention to the huge list of numbers and such.When you finish and hit reply your post with pictures will come up.
Sept 14, 2020 7:29:27 GMT -8
deadstarsstillburn: Hi there. I was directed this way by folks on the Permies.com website and am hoping I can get some information on how a total newbie can get started designing, siting, building, and not-dying-in-a-horrible-house-fire with a new RMH in a 160-year old home
Oct 21, 2020 6:52:10 GMT -8
deadstarsstillburn: The people over there recommended either a 6" batchbox or an 8" J-tube. I don't know what those are but am going to try to figure that out. What I need is a blueprint that I can scale to fit the need for my house. I have something likne 5000 square feet
Oct 21, 2020 6:53:00 GMT -8
deadstarsstillburn: but I do not need to heat all of it by any means. probably only need to heat half of that, maybe less.
Oct 21, 2020 6:53:15 GMT -8
deadstarsstillburn: moreover, the house has 3 storeys (large attic) so I assume if I get very efficient heating on the ground floor, that will go a long way toward heating the upstairs as well, no?
Oct 21, 2020 6:53:59 GMT -8
BenAlexanderT: Happy new year everybody. I wish you the best
Dec 31, 2020 15:06:14 GMT -8
Solomon: Anybody in Southern Oregon, in Jackson or Josephine counties?
Jan 16, 2021 21:54:43 GMT -8
gnomedome: i realsie this is from 2009
Apr 14, 2021 8:30:44 GMT -8
gnomedome: i realize this is from 2009 id love to see the photos from this ..as im looking to build a sauna soon similar to this .... if anyody sees this post email@example.com..... the photos in this post did not show up
Apr 14, 2021 8:32:00 GMT -8
dcoyte: I am planning to use a cast iron heat exchanger out of a hydronic boiler set on top of my rocket stove, flue out the top. There will be a pump moving the water through the heat exchanger into an unpressurized 2000 gal tank. Any thoughts?
Dec 31, 2021 6:45:55 GMT -8
syekoms: Yes just found this forum am in Josephine county.
Jun 17, 2022 12:53:32 GMT -8