Now that cooler fall weather is firmly here and freezing cold winter is around the corner, I’ve been thinking about moving my clay, glazes and tools to the communal heated studios of the Colorado Potters Guild. As a mom to an elementary school age child, however, I love the flexibility of being able to work from home when and where I find free time and schlepping back and forth to the guild is really going to be a downer for me. So, I started a search for an inexpensive heat source for my garage/studio that can be left unattended overnight.

Well, you know how it is when using the internet to research – one link leads to another and all of a sudden, I discovered a gazillion DIY solutions for supplemental heat powered by the sun on a shoe string budget.  If I knew we were going to be staying in our current home for awhile, I’d install photovoltaic solar panels on the house and my studio, but it looks like we’ll be moving within 1-2 years.

DIY Solar Heater by Daniel Strohl

The photo above is from a project detailed on the Hemmings Motor News Blog and shows how to make a homemade solar convection heater that uses commonly available materials both recycled and readily available for almost 0$ – absolutely less than $100.00 if you have to buy everything.

Project list includes:

• Have to have south facing wall or window that gets direct sun for a good part of the day
• empty clean aluminum cans
• weather proof caulking
• plywood
• wood
• screws and assorted hammers, screw drivers etc.
• black all weather paint (for grills)
• glass or acrylic panels (recycled windows would probably work great)
• drill
• dryer vent tubing or other
• clamps

Optional:

• insulating panel, foam or batting
• thermostat
• low volume fan
• dryer vent
• metal flashing

While the project does require cutting holes into your wall,  this site illustrates a similar set up mounted in a window instead of a wall which requires no cutting of holes into an exterior wall – which is pretty cool because this makes it portable (perfect for apartment/condo dwellers).

So how does it work?

Solar air diagram from http://rimstar.org

Cool air is pulled in from the bottom inside wall vent and as it’s warmed by the sun in the solar chamber, the heat rises naturally and it expelled back into the same room higher up on the wall – natural convection heating.  On sunny days, a 30-50° increase in temperature can be achieved with this system.

The downside of the system is that it only works while the sun is shining, so at night or on overcast days, it won’t really provide heat, so it really only functions as a supplemental heating system.  The price is right, however, and here in sunny Colorado it is well worth the effort.  If installed in a more temperate climate in the south, supplemental heat wouldn’t be needed at all.

On the website, Instrucables, this project uses window screens instead of aluminum cans and was adapted from a $350.00 solar heat project that Gary Resa author of Build it Solar built for his barn and that was published in The Mother Earth News and Home Power magazines.  If you download Gary’s pdf with photos and plans, he provides a graph that looks at outside air temp, solar chamber output, inside temp at different times of the day and night which is incredibly helpful since I want to prevent my clay and glazes from freezing.  Even at night it looks like his barn workshop stays above freezing even though the outside temp can get to 10-20° F in the winter where he lives in Montana. His project is also very detailed an provides safety recommendations such as adding metal flashing to vents since most buildings in the US use wood framing.

Both Instructables and Build it Solar have other great DIY solar projects to attempt.

Here are some photos of similar projects here (I looked for more information about this set up, since the maker of the project claims that enough heat is stored to adequately heat the space overnight, but could find none), here, and here.

Cansolair panel installed on side of house

A commercial alternative for those of you who aren’t on a budget is made by Cansolair out of Newfoundland, Canada for approximately $2800.00 installed and can heat approximately 1000 square feet of living space.

Visit this website to see Cansolair’s Canadian patent application for design drawings for a better understanding of how this type of  passive solar space heating works and for design ideas.

SolarsHeat 1000G heats up to 300 ft2

Solarsheat is another commercial option with varying sizes available from $1290 per unit and can be wall or roof mounted.  This is the smallest usit – though the company makes larger ones depending on space heat requirements.

This video shows a similar set up as the recycled can solar heat collector, but with 3″ aluminum dryer venting instead of recycled aluminum cans.

This is a longer 16 minute video from Green Power Science who made a solar collector heater using just cardboard, paint and wood and it can be mounted on a wall or roof.  The author does advise people to use weather and heat proof materials for a permanently installed unit of your own making.

Pros of solar heat collectors:

1. inexpensive to free
2. uses solar energy to heat spaces which saves money
3. Less dependence on fossil fuels
4. not too difficult to make – no special skills needed
5. depending on the size, you could heat your whole house or just an outbuilding/shop/garage

Cons:

1. Supplemental heat – doesn’t work well on overcast days and not at all at night
2. Not a terribly attractive addition to the house – though some aren’t bad

I showed my husband the plans and we’re going to try to make one.  Probably an amalgamation of several plans and we are going to make it with safety in mind.

I will need to add supplemental heat to the garage/studio for overcast days and nighttime, but in my search for solar powered space heaters, I found the following electric heater that should do the trick.

Eco Heater

Eco Heaters are high energy efficiency convection heaters that are mounted on a wall and cost about 3¢/hour to operate – If I used it from 10pm – 8am, the cost would be approximately .30/day during the winter months.  If I can get a satisfactory result from the DIY solar heater, I’m going to buy one of these and install in in my garage studio – I should only have to operate it at night when the temp is expected to be below freezing.  It is also portable, so when we move, I can take it with me.

Meanwhile, my husband and I are going to try making on of these removable storm window solar panel heaters for a south facing window on the main floor of our house just for kicks.  The panels are capable of delivering 120° F + of supplemental heat on sunny or partly sunny days and if you have a thermostat installed in your home, the main heat source won’t come on at all until the temperature drops.  We have gas forced air as heating for our home and normally program our thermostat to raise the temp to 65°F only between 6am – 9am and then again 4pm – 9pm.  During sleeping hours and daytime hours, it’s set at 55°F – the house heats up pretty well during the day due to many south facing windows.

Meanwhile, I’ve loaded a packed kiln for a bisque firing and will have one additional bisque to fire tomorrow which will leave me 5 days to glaze and fire.  I imagine I’ll have to press my old manual Paragon into service to get all my work fired in time for the Guild’s sale next weekend.

Happy Halloween,

Rhiannon 4th grade

~Cynthia

New card

A few months ago, I realized that I needed some new cards because my old business cards didn’t even have my email address on them and still sported my old blog url.  The Colorado Potters Guild made the decision to allow members to have business cards available at our fall sale upon request at our last meeting and I got to work.  The CPG was formed more as a coop and has never been keen on promoting individual members work, so this is a new turn of events for our group.

I like the card a lot more than my old one and even changed my Twitter page to match.  I don’t do a whole lot with Twitter, though I suspect that there’s more to it than I realize – another app to occupy my time.

Business card for the guild

Meanwhile, I’ve become the unofficial web marketing person for the Colorado Potters Guild and designed generic CPG cards for members who either don’t want individual cards or who don’t have the software to design a card.   It matches our website and has pertinent guild info printed on it.   These cards will be included with purchases at our fall sale and available for people to take home for future reference.  I wanted to add next year’s sale dates, but was voted down.

For those of you on Facebook, do you think I should make a separate page for the guild as a marketing tool?

Must run now – going to my daughter’s school Halloween party (the kids start a mini fall break tomorrow and won’t be in school on Halloween),

~Cynthia

Anti-fatigue mat for standing and throwing

On Friday, I drove to the hardware store because I was out of mapp gas for my torch and while I was there, I decided to pick up an anti-fatigue mat for my new wheel set up since I’m pretty sure, I’ll never sit down to throw again.  The mat is cushy and much more gentle on my legs than bare concrete, but it has that noxious rubber/new carpet smell that makes me nauseous.  Anyone know how to get rid of that smell?

On a side note, I was very sad to pull into my favorite mom and pop hardware store that’s been in Denver forever.  The doors were shuttered and a sign read “Out of Business”.  Instead of being able to run in and out of the store fast, I headed over to Home Depot to find what I needed and wandered aimlessly until I found what I needed.

Wheel thrown porcelain orb vases

This is one of my favorite forms to make.  I’m not sure how practical they are, but I like them.  I’m trying to figure out how to finish and glaze these after I bisque fire them.

The cool thing about my recent studio push is that a ton of new ideas are popping into my head every day.  Making stuff is giving me ideas which makes me think that when I’m having one of those uninspired moments, I just need to do something in the studio – anything.  I need to sketch/write some of these ideas in my notebookso that I can explore some of them after the sale ends.  Today and tomorrow are really  my last day to make work for the Colorado Potters Fall Sale opening in 2 weeks.  Today, I’m going to make some butter dishes and tomorrow, I plan on making some ornaments.  I figure the ornaments will dry pretty fast.

Hand built and wheel thrown vases with different necks and two in progress

I’ve also been playing around with different thrown necks for the slab built vase bases.  I kind of like how no two are alike.  Do you ever make stupid mistakes in the heat of making work for a show?  I did that on Saturday and I swear, I almost cried and was cussing like a sailor at my carelessness.

2 slab built vase bases and 4 wheel thrown necks hit the deck - err make that concrete floor

Shelving is at a premium right now and I had placed a ware board with 2 vase bases and about 3 wheel thrown necks on an unstable surface…topple, crash, bang, boom.  Lesson learned.  If I’m going to take the time to make the work, I need to be conscientious of where I place it.

Work is drying everywhere

I think it’s time for me to fire a load of bisque and to start glazing so I can free up some room.  My shelves are full and there’s no extra space for work.  Consequently, I’m getting creative.  If you look closely, that is indeed a margarita sitting on the drywall board.  The drink was courtesy of my husband and was his way of saying, “time to quit for the day.”

Meanwhile, I’ve been having a lot of fun playing around with Facebook.  If you’re on FB, look me up.  I’ve found a ton of old high school classmates and continue to add clay people to my “friends”.  I even chatted with someone from Turkey the other day.

I also have a ton of blog posts lined up – too much to say, so little time.  I actually sat down at the computer around 9 pm last night intending to write this post, but I didn’t have the energy to write.

That’s it for today,

~Cynthia

New table for my wheel

Three weeks ago, Ben posted an image of a table that he built for his pottery wheel so that he could throw while standing, instead of sitting.  After seeing his table, I knew I wanted one too so I saved the image to my computer to show to the perfect person for the job.  No – not my husband – he’s not really into building stuff.  My in laws flew into town from San Antonio, TX last Thursday and my father in law loves to make stuff out of wood and he is always looking for projects to do around our house.

I showed him Ben’s photo and handiwork and my FIL started designing, measuring and making a shopping list in preparation for building a table for me.  He’s so good at improvising and winging it.  I think the trickiest part was figuring out an ideal height for me to throw standing.  I basically had to pretend I was air throwing at a comfortable place for my hands and arms so he could come up with a combined height of table and wheel.  I think the rim of the splash pan stands about 35″ high – the wheel head is slightly lower.  I’m not a tall person though – only 5′5″ tall.

Table has storage on 2 levels

What can I say?  I love it – thanks Tig!  I’ve never thrown standing up before, so I wasn’t sure I would like it.  Since trying it out, I can’t imagine throwing sitting down ever again.  I love being at eye level (almost) when working on the small finishing details.  It’s so much easier on my back and neck to throw standing up.  The only thing that is a little tricky is when the piece gets taller – I figure I’ll need a little booster for those instances.

I love my Thomas Stuart Wheel!  After seeing a 4 page advertising spread in the new issue of Ceramic’s Monthly yesterday, I learned that the local Denver company just merged with Skutt and the wheels will soon be sporting a new name.

Original Maverick mug by Justin Rothshank

Meanwhile, I will soon receive a piece of Obamaware in the mail.  The Obama/Biden fund raiser ended yesterday and I almost missed it because it was dinner time here in Colorado and with my in laws in town it’s been quite busy.  I didn’t win my first choice which was also a mug by Justin Rothshank, but with minutes to spare, I was the winning bidder on another one of his pieces.  I wasn’t able to do the “buy it now” for the one I really wanted – suffice it to say that end of the month finances didn’t support it, but, I was able to bid up 2 other pieces to my max price so I helped a little.

My in laws left this morning, so I will be in the studio till 3pm today,

~Cynthia