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  1. #1
    Join Date
    Nov 2019
    Posts
    1
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    Soon to be first time home builder. Seeking guidance.

    Hey folks new member here. I just purchased land and will be building in the next few years. I am trying to weigh my options. Input would be greatly appreciated. The location is upstate New York.

    My intention is to build a slab on grade 40x60 steel building with 12 or 13 foot walls. A large portion of the building will be a full height "garage". Approximately 20x25 feet will be converted to living space. The way I have my plans laid out I am looking at around 1400 sq feet of living area including a 2nd floor with 4.5 or 5 foot knee walls.

    My intention is to invest heavily in creating a tight envelope. I would like to install a robust solar array and heat and cool strictly with electric. I would like to maintain a temperature of around 75 in the garage area during the summer months. Conversely a temperature of approximately 55 in the winter months. In the living area 68 degrees plus or minus a few degrees is my goal.

    We have hot summers and cold winters so heating and cooling needs are demanding here. It not rare to see 95 in the summer and mid teens in the winter.

    I am going to attempt to attach a rough idea of the building's layout. The dimensions may be different but it is the general idea. The first floor has kitchen and living room area. The second floor hosts the rest of the rooms. The vehicles park inside next to the living area on the first floor and the second floor goes full width above the vehicles.

    I was thinking a mini split system may be my best bet. As much as I love fire places I do not want to deal with wood heat unless maybe I used an outdoor boiler. I don't want the smoke or the air exchange that must occur with a fire place.

    Thank you in advance for your expertise.
    Attached Images Attached Images  

  2. #2
    Join Date
    Jun 2014
    Location
    Dover, DE
    Posts
    11,765
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    You’ll have to use multiple ducted systems, or a single mini with multiple heads. As it’s against code to use the same ducted unit for a living area and garage.
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

    Local 486 Instructor & Service Technician

  3. #3
    Join Date
    Sep 2005
    Location
    Atlanta GA area
    Posts
    42,937
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    Following up on Rider's post...
    Mixing air from the garage and living area... is DANGEROUS! Think CO poisoning... which is a serious thing!
    Google 'Nationalcomfortinstitute' and go to the CO/CA section...

    My suggestion would be separate systems... and seal up the living quarters tightly.
    Arrange for the shop area to be warmer in the summer and cooler in the winter...
    AND
    Arrange for a small fresh air (from the OUTSIDE) to the return of the living area system. Why??? This will produce a positive air pressure (10-20 pascals) enough to cause a draft from the living space to the shop area. The result will be: safety from dangerous fumes from the shop. BTW: CO is has no odor... the first thing folks notice is flue like symptoms, followed by lethargic feeling and headaches... if it gets bad enough... you just do not wake up tomorrow morning...

    I would do some careful research on this before finalizing plans for your heating and AC!
    GA-HVAC-Tech

    Your comfort, Your way, Everyday!

    GA's basic rules of home heating and AC upgrades:
    *Installation is more important than the brand of equipment
    *The duct system keeps the house comfortable; the equipment only heats and cools (and dehumidifies)
    *Cheap is not good, good is not cheap; however expensive is not a guarantee of quality!
    Choose your contractor wisely!

  4. #4
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    9,693
    Post Likes
    Musst be a winter climate?
    Fresh air change is a must, a fresh air change in 4-5 hours minimal when occupied to purge indoor pollutants and renew oxygen. A valid point on using mechanical fresh air to maintain a positive pressure to avoid infiltration from the garage.
    If it is a green grass climate, suggest using a small whole house dehumidifier provide the fresh air and maintain <50%RH during wet time of the year.
    Keep us posted on your thoughts.
    Regards Teddy Bear
    Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
    Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
    Use +Merv 10 air filter. -Don't forget the "Golden Rule"

  5. #5
    Join Date
    Jan 2014
    Location
    New England
    Posts
    6,377
    Post Likes
    Throw those snowmobiles on your truck, and I’ll bring mine and meet you at Old Forge when the snow flies....

  6. #6
    Join Date
    Sep 2002
    Posts
    27,166
    Post Likes
    Make sure that one of the long walls of the building faces Solar South.

    You can find it with a vertical stick in the ground - at solar-noon the shadow cast by the stick will run exactly solar north and south.

    That long wall will want to be top-to-bottom passive solar.

    Build the peaked roof at exactly the right angle for solar collection. This is about your latitude plus 15 (steeper) - but you can check my numbers easily.

    Pour the slab over 8" of good foam board and also do the perimeter down four feet vertically.

    Install a heavy schedule of floor tubing (like a radiant floor) everywhere in the building - but especially in the concrete.

    Cover the south facing plane of the roof with hydronic solar collector panels. Use this collected heat to provide all your domestic hot water (about 200 gallons) and also store the solar heat by heating the concrete slab.

    Install the PV solar panels as a ground array for easy snow removal.

    PHM
    --------


    Quote Originally Posted by TJBAILEY View Post
    Hey folks new member here. I just purchased land and will be building in the next few years. I am trying to weigh my options. Input would be greatly appreciated. The location is upstate New York.

    My intention is to build a slab on grade 40x60 steel building with 12 or 13 foot walls. A large portion of the building will be a full height "garage". Approximately 20x25 feet will be converted to living space. The way I have my plans laid out I am looking at around 1400 sq feet of living area including a 2nd floor with 4.5 or 5 foot knee walls.

    My intention is to invest heavily in creating a tight envelope. I would like to install a robust solar array and heat and cool strictly with electric. I would like to maintain a temperature of around 75 in the garage area during the summer months. Conversely a temperature of approximately 55 in the winter months. In the living area 68 degrees plus or minus a few degrees is my goal.

    We have hot summers and cold winters so heating and cooling needs are demanding here. It not rare to see 95 in the summer and mid teens in the winter.

    I am going to attempt to attach a rough idea of the building's layout. The dimensions may be different but it is the general idea. The first floor has kitchen and living room area. The second floor hosts the rest of the rooms. The vehicles park inside next to the living area on the first floor and the second floor goes full width above the vehicles.

    I was thinking a mini split system may be my best bet. As much as I love fire places I do not want to deal with wood heat unless maybe I used an outdoor boiler. I don't want the smoke or the air exchange that must occur with a fire place.

    Thank you in advance for your expertise.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  7. #7
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    9,787
    Post Likes
    Quote Originally Posted by TJBAILEY View Post
    Hey folks new member here.

    I just purchased land and will be building in the next few years.
    I am trying to weigh my options. Input would be greatly appreciated.

    The location is upstate New York.

    My intention is to build a slab on grade 40x60 steel building with 12 or 13 foot walls.

    A large portion of the building will be a full height "garage".

    Approximately 20x25 feet will be converted to living space.

    The way I have my plans laid out I am looking at
    around 1400 sq feet of living area including a 2nd floor with 4.5 or 5 foot knee walls.

    It is not rare to see 95 in the summer and mid teens in the winter.

    I am going to attempt to attach a rough idea of the building's layout.
    The dimensions may be different but it is the general idea.


    The first floor has kitchen and living room area.
    The second floor hosts the rest of the rooms.


    The vehicles park inside next to the living area on the first floor
    and the second floor goes full width above the vehicles.

    I was thinking a mini split system may be my best bet.

    Thank you in advance for your expertise.
    ___ 1,900 Square Feet LIVING SPACE

    R-40 CEILING
    R-18 WALLS
    __________ MOST of the Area will be Spray Foam?

    __________ AREA SUMMARY _______
    ______ __ Shop/Garage _ Living Areas
    1st floor __ 1,900 ________ 500
    2nd floor _ 1,000 ________ 1,400
    _________ 2,900 ________ 1,900

    OR other ?
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  8. #8
    Join Date
    Jun 2012
    Location
    Northern NV
    Posts
    2,006
    Post Likes
    Radiant heat in the slab and mini-splits for the living space is my suggestion. I like the hot water solar idea for the concrete as it will soak up several million BTU's on a nice sunny day.

  9. #9
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    9,787
    Post Likes

    ... JUST A STARTING POINT

    Guidance:

    1 https://www.energycodes.gov/adoption/states/new-york

    2 NET ZERO / RESIDENTIAL
    _______________ https://www.wbdg.org/resources/net-z...ergy-buildings

    3 IECC 2018

    3A https://codes.iccsafe.org/content/ie...rgy-efficiency

    ___ Section R405 Simulated Performance Alternative (Performance)

    3B https://codes.iccsafe.org/content/iecc2018/chapter-4-[re]-residential-energy-efficiency#IECC2018_RE_Ch04_SecR405

    3C Table 402.1.2

    ZONE 6 _ _ Prescriptive
    ______ CEILING R-49
    ______ WALLS R-20 + 5
    ______ FLOOR SLAB R-10 ..
    ______ U-FACTOR 0.32 or BETTER


    4 https://www.energy.gov/eere/building...ologies-office

    5 https://en.wikipedia.org/wiki/Zero-energy_building

    6 SOLAR PV
    _________ http://www.fsec.ucf.edu/en/consumer/...les_arrays.htm
    Attached Images Attached Images  
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  10. #10
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    9,787
    Post Likes
    Quote Originally Posted by TJBAILEY View Post
    Hey folks new member here.

    I just purchased land and will be building in the next few years. I am trying to weigh my options.
    Input would be greatly appreciated.

    The location is upstate New York.

    My intention is to build a slab on grade 40x60 steel building with 12 or 13 foot walls.

    A large portion of the building will be a full height "garage".
    Approximately 20x25 feet will be converted to living space.
    The way I have my plans laid out I am looking at around 1400 sq feet of living area
    including a 2nd floor with 4.5 or 5 foot knee walls.

    My intention is to invest heavily in creating a tight envelope.

    ... maintain a temperature of around 75 in the garage area during the summer months.
    Conversely a temperature of approximately 55 in the winter months.
    In the living area 68 degrees plus or minus a few degrees is my goal.

    It not rare to see 95 in the summer and mid teens in the winter.

    I was thinking a mini split system may be my best bet.
    Thank you in advance for your expertise.
    2018 IECC

    R-44 + Ceiling
    R-20 __ Walls
    R-10 __ Floor
    350 Sq Ft of Glass

    Heat Loss may be substantial : >~ 40,000 BTU/HR

    Radiant Floor heating could address
    ~ 1/3 to 1/2 of the Heat Loss.

    ZIP _ _ _ _ _ is necessary to establish
    ____ Design Temperatures
    ____ HDD Heating Degree Days
    ____ CDD Cooling Degree Days
    ___ Solar PV Performance
    Attached Images Attached Images   
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  11. #11
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    9,787
    Post Likes
    _ _ Double Post
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

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