Re: [AFMUG] OT: Major off topic. Off grid home

Thu, 20 Jan 2022 13:34:17 -0800

The rate at which outdoor air replaces indoor air is described as the air exchange rate.  ASHRAE  (formerly called the American Society of Heating, Refrigerating and Air-Conditioning Engineers) recommends (in its Standard 62.2-2016, *"Ventilation and Acceptable Indoor Air Quality in Residential Buildings"*) that homes receive 0.35 air changes per hour  but not less than 15 cubic feet of air per minute (cfm) per person. as the minimum ventilation rates in residential buildings in order to provide IAQ that is acceptable to human occupants and that minimizes adverse health effects. ASHRAE also suggests intermittent exhaust capacities for kitchens and bathroom exhaust to help control pollutant levels and moisture in those rooms. ASHRAE also notes that "dwellings with tight enclosures may require supplemental ventilation supply for fuel-burning appliances, including fireplaces and mechanically exhausted appliances.
That is a lot of air, sounds like a large open window.  not less than 15 cubic feet per person.  I don't much care for the smell of chip-board, gives me a headache and yet that's all these freaky new houses are made of. 

On 1/20/22 12:51, castarritt wrote:

These days, people building for extreme energy efficiency will seal 
the building envelope as much as possible, and then install a heat 
recovery ventilation system.


On Thu, Jan 20, 2022 at 2:26 PM Jan-GAMs <[email protected]> wrote:

    I recall reading about houses requiring so many air changes per
    hour before they become unhealthy to live in. This article was
    written many years/decades ago.  I wonder if the standards for a
    healthy house has changed?

    On 1/20/22 09:54, Andy Trimmell wrote:


    My dad was just talking about walls like this and we’re in
    Indiana. I don’t know where he heard it from but the guy did it
    about 20 years ago here. He said he had to open the door because
    they were running out of oxygen  LOL

    *From:*AF [mailto:[email protected]
    <mailto:[email protected]>] *On Behalf Of *Chuck McCown via AF
    *Sent:* Thursday, January 20, 2022 12:46 PM
    *To:* [email protected]; 'AnimalFarm Microwave Users Group'
    *Cc:* [email protected]
    *Subject:* Re: [AFMUG] OT: Major off topic. Off grid home

    Double walls, so really there are three cavities. Two walls with
    an air space between them. Insulation and vapor barrier on the
    outer and inner wall with triple glazed windows.  I read a report
    on these homes being built in Canada.  They didn’t need much heat.

    Chuck McCown
    McCown Technology Corporation
    8401 N Commerce Dr
    Lake Point, Utah 84074
    801-250-9503
    435-830-4306 cell
    www.mccowntech.com <http://www.mccowntech.com>
    www.microtrench-blades.com <http://www.microtrench-blades.com>
    www.terabitnetworks.com <http://www.terabitnetworks.com>

    *From:*[email protected]

    *Sent:*Thursday, January 20, 2022 10:32 AM

    *To:*[email protected] ; 'AnimalFarm Microwave Users Group'

    *Subject:*RE: [AFMUG] OT: Major off topic. Off grid home

    I’ve wondered how long firewood wood really last if everyone was
    trying to use it.  Wasn’t there a firewood crisis in the 19^th
    century before they started using coal for everything?

    I think reliance on firewood in the apocalypse comes with an
    implicit assumption that everybody else died. If they haven’t
    died yet then expect competition.

    I don’t worry too much about water.  You can’t go anywhere in the
    Northeast without tripping over a stream or a spring.  If the
    spring water is contaminated then so is the well water and you’re
    screwed either way.

    How much is triple insulation?  Does that mean R57 in the walls
    instead of R19?

    *From:*[email protected] <[email protected]> <mailto:[email protected]>
    *Sent:* Thursday, January 20, 2022 12:09 PM
    *To:* [email protected]; 'AnimalFarm Microwave Users Group'
    <[email protected]> <mailto:[email protected]>
    *Subject:* Re: [AFMUG] OT: Major off topic. Off grid home

    Triple insulated home can be heated by only the bodies inside.

    Most areas (other than where I live) there may be wood to burn. 
    You could always use a parabolic solar cooker for cooking.

    Solar hydronic.  Solar electric.  Water is the huge thing.  Need
    to pump a well.

    I think move to the tropics where you can eat off the land/sea
    and run around naked all the time.  That is a good solution to
    the end of the world.

    Not much of a prepper anymore.  Too old I guess.  Plus I have an
    odd condition where I don’t get hungry.  So I could starve to
    death without much suffering.

    *From:*[email protected]

    *Sent:*Thursday, January 20, 2022 9:44 AM

    *To:*'AnimalFarm Microwave Users Group'

    *Cc:*[email protected]

    *Subject:*RE: [AFMUG] OT: Major off topic. Off grid home

    Maybe it’s a matter of being self-reliant until your solar panels
    break vs being self-reliant until your fuel runs out.  Years vs
    months.

    *From:*AF <[email protected]>
    <mailto:[email protected]> *On Behalf Of *Chuck McCown via AF
    *Sent:* Thursday, January 20, 2022 10:47 AM
    *To:* AnimalFarm Microwave Users Group <[email protected]>
    <mailto:[email protected]>
    *Cc:* [email protected]
    *Subject:* Re: [AFMUG] OT: Major off topic. Off grid home

    That said, the last time I checked, propane and wood pellets cost
    half that of electricity for heating. And natural gas was half
    that again.  So natural gas vs electric heat pump for heating
    would probably be the same energy cost.

    *From:*Chuck McCown via AF

    *Sent:*Thursday, January 20, 2022 8:40 AM

    *To:*AnimalFarm Microwave Users Group

    *Cc:*[email protected]

    *Subject:*Re: [AFMUG] OT: Major off topic. Off grid home

    3.41 BTU per watt for resistive heating.  Heat pump gives you way
    more heat per watt. That is why most of the electric cars have
    gone to heat pumps for the heater. The heat pump Tesla will run
    the heater for 36 hours and still leave you with enough battery
    to get home in many cases.

    Chuck McCown
    McCown Technology Corporation
    8401 N Commerce Dr
    Lake Point, Utah 84074
    801-250-9503
    435-830-4306 cell
    www.mccowntech.com <http://www.mccowntech.com>
    www.microtrench-blades.com <http://www.microtrench-blades.com>
    www.terabitnetworks.com <http://www.terabitnetworks.com>

    *From:*Robert

    *Sent:*Thursday, January 20, 2022 7:11 AM

    *To:*[email protected]

    *Subject:*Re: [AFMUG] OT: Major off topic. Off grid home

    The $800 mini-splits I am looking at put out about 6K BTU's of
    heat on 400 Watts. The home depot $300 heaters put out 5K BTU's
    but require 1500 watts..   Not going to do well in the winter
    overnight off grid...   And no a/c in the summer...

    On 1/20/22 5:53 AM, Jan-GAMs wrote:

        $1895? For a one room ac/heater? Home Depot has something
        similar for $300.  Is it the decal?  Hood ornament?

        On 1/19/22 05:13, Zach Underwood wrote:

            If you have not already gotten the mini splits take a
            look at https://www.hotspotenergy.com/solar-air-conditioner/

            It has direct PV inputs when sunny it would put no load
            on your inverter

            IT can be put in solar only mode where it will scale the
            cool/heat output to match the power it is getting PV

            It can run overnight if you wish by giving in 240volt AC
            connection.

            On Tue, Jan 18, 2022 at 7:08 PM Robert
            <[email protected]> <mailto:[email protected]>
            wrote:

                I am working on my first off grid home, and hope to
                do another in the
                future somewhere more northerly.. This one is in the
                sunbelt of N.
                Nevada and currently I have 4K of solar feeding a
                30KW LFP battery bank
                through currently a Victron charge controller and a
                couple midnight
                solar inverters to generate a flawed 220 as well as
                two sides of 110.  (
                the 220 will not run the well controller even though
                supposedly
                configured for such. )    I am upgrading the
                inverters and controller to
                a
                
https://www.signaturesolar.com/products/8kw-48v-240vac-split-phase-120a-250vdc-off-grid-inverter-by-growatt

                planning on doing a couple 9K mini-splits for
                heating/cooling.

                I wonder if this group has some gotchas that I might
                learn from in
                advance before I buy myself into a corner...    I'm
                all ears..

                thanks!!


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            Zach Underwood (RHCE,RHCSA,RHCT,UACA)

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