Energy Cost of Unit #5

by Eric Dolven

We’ve been living at the Commons for almost a year and I’ve been curious how energy efficient our house really is.  We spent extra money for a ductless mini-split heat pump, double paned Anderson-100 windows, a heat recovery ventilator, (all pictured here) blown in fiberglass insulation, energy star lighting and appliances, and I’m getting curious how much our energy bills are reduced by these measures.  Of course I can’t answer that question because this is a new house, but I can compare how much we are paying now versus how much we were paying at the same time last year in our old, leaky, drafty Seattle house. IMG_7865

Since we don’t have a gas line anymore, all of our energy comes in as electricity.  Heat, hot water, cooking, lights.  So it’s hard to single out heating costs.  But assuming the largest utility cost comes from heat and that we are lighting and using hot water in the same way, it’s probably fairly accurate to compare total energy cost of the old house with total energy cost of the new house.  So what

air_handler

I’ve done is gone back and compared our utility bills from roughly June 1, 2012 (when we moved in) to the present, with the equivalent bills from the same time the previous year.

That said, here are the results:

Commons House

Old House

date

energy (KWh)

cost

heat deg days

energy (KWh)

cost

heat deg days

6/20/2012

213

$18.14

8/16/2012

910

$77.49

85

71

10/15/2012

979

$84.17

512

$189.63

469

12/19/2012

2084

$184.48

1341

$190.51

1443

2/20/2013

2399

$212.36

1316

$226.44

1404

pump_outside

I was missing some figures from the fall of 2011 and I don’t have the end of spring 2013, but I was able to capture the deep of winter 2011/12 and 2012/13.  Some things to note:

  • The heating degree days in the deep winter were about 6-7% higher in 2011/12 than 2012/13.  The heating degree day is a measure of how cold the month was.  The higher the number, the colder the month.  Thismeans the heating load was around 6-7% higher last winter than this past one.  With this correction, what we spent this year matches last year very well.
  • On the surface, this would be a bit surprising.  New house, expensive energy saving features, same energy cost.  There are two things to remember: The volume of our new house is about 2.2 times that of our old house.  We are heating windowtwice the volume for the same cost.
    • We had very different heating habits in our old house.  We tended to turn our gas furnace off as much as possible.  We would often let the house dip into the mid-50’s overnight.  When at home, we kept the thermostat quite a bit lower.  More like 62-63 degrees rather than the 67 degrees we currently heat to.   We closed heat vents in unused rooms.  While this saved us some money, it made for a rather uncomfortable house.  And because we let it get so cold, condensation would form on the walls in places with little circulation.  Not a good thing.  Now our practice is to set the heat pump to 67 degrees and leave it there.  Day and night, home and away.  A temperature that is very comfortable, keeps the whole house warm, and prevents the less efficient back-up Pick-a-Watt heaters from coming on.HRV

For the same cost, we are heating a house that is 2.2 times bigger than our old house and we are heating it to a much more comfortable temperature that keeps moisture away and promotes constant circulation.

Yellow Brain Fungus, Water Ouzel & Snowberries

by Shawna Lee

After many hours of rain, North Creek was overflowing its banks again, although it was not as high as it was a few weeks ago. Bob and I walked down to the creek edge this morning to see it. The power of that much water always feels exciting, and it’s fun to see how the bigger volume of flowing water has changed and shifted the contours of the banks and stream bed, not to mention loose objects beside the creek like the logs of the fire pit.

Looking upstream

 

Cinclus mexicanus

A cute little American Dipper was bobbing up and down at the flooded edge of the creek. It is such a soft gray and blends so well into the background of gray water that I didn’t see it until I had gotten fairly close to it. I stayed still and with no alarm, it continued to bob and poke into the shallow water for aquatic insects, their larvae, and maybe even tiny fish.

Also known as Water Ouzels, these little birds have an extra eyelid, a nictitating membrane, that protects their eyes and allows them to see underwater. Scales close their nostrils when they submerge their heads. They produce more oil than other birds which helps keep water from touching their skin, keeping them warmer. Water Ouzels were John Muir’s favorite bird. He devoted a whole chapter to the American Dipper in his book, The Mountains of California (1894). A sample of his beautiful writing about this unassuming and lovely little bird.

He is a singularly joyous and lovable little fellow, about the size of a robin, clad in a plain waterproof suit of bluish gray, with a tinge of chocolate on the head and shoulders. In form he is about as smoothly plump and compact as a pebble that has been whirled in a pot-hole, the flowing contour of his body being interrupted only by his strong feet and bill, the crisp wing-tips, and the up-slanted wren-like tail.

Find a fall, or cascade, or rushing rapid, anywhere upon a clear stream, and there you will surely find its complementary Ouzel, flitting about in the spray, diving in foaming eddies, whirling like a leaf among beaten foam-bells; ever vigorous and enthusiastic, yet self-contained, and neither seeking nor shunning your company.

He is the mountain streams’ own darling, the humming-bird of blooming waters, loving rocky ripple-slopes and sheets of foam as a bee loves flowers, as a lark loves sunshine and meadows. Among all the mountain birds, none has cheered me so much in my lonely wanderings, —none so unfailingly. For both in winter and summer he sings, sweetly, cheerily, independent alike of sunshine and of love, requiring no other inspiration than the stream on which he dwells. While water sings, so must he, in heat or cold, calm or storm, ever attuning his voice in sure accord; low in the drought of summer and the drought of winter, but never silent.

 

Symphoricarpos albus

Snowberry bushes that we planted a couple of summers ago as part of a hedgerow are loaded with luminous white berries, so heavy that the branches arch gracefully under their load. They are native shrubs that provide habitat and food for a variety of fauna, large and small.

Carpeting the ground around our hedgerow plants are rusty red/brown leaves from nearby bigleaf maple trees (Acer macrophyllum). This Pacific Northwest native has the biggest leaves of any maple in the world. In the spring, it’s large pendulous blossoms emerge before the leaves and attract lots of pollinators.

For one of our meetings, Tom harvested some of the blossom clusters, breaded and fried them for us to sample. Quite yummy they were, too. Apparently, bigleaf maple sap has similar sugar content to the East Coast’s famous sugar maples, although the flavor is different. Maybe this spring I’ll tap a tree or two and try my hand at making a little syrup.

Looking downstream. On the left is a canoe that washed down the creek during the last flood in October and got caught on a snag in the creek. Eric and Tom unstuck it and brought it up on shore.

Looking upstream

 

A scattering of bigleaf maple leaves.

 

Tremella mesenterica
This shocking yellow jelly fungus, swells and stands out when it rains. It has a couple of fun, common names–Yellow Brain Fungus and Witch’s Butter.

 

Looking downstream. Just beyond the tree that is inexorably becoming more and more horizontal, the creek splits and creates an island in the middle.

Churning high water

 

The light was lovely this morning. Mostly cloudy with eastern sun filtering through clouds, the grasses seemed to glow. In our northern latitude, winter sunlight has the quality of what’s known in photography as the golden hour, all day long. (Seattle, at 47.6 degrees latitude, is the northernmost US city of more than 500,000 people in the lower 48 states, farther north even than Ottawa, Toronto and Montreal in Canada.)

The Salmon Return

by Bob Freeman

We recently heard that salmon were spotted in North Creek downstream from the Commons in Bothell. The water levels were a bit low and we were concerned that the fish would have a hard time swimming up to our neck of the woods. This last week, we finally saw some good rain and the stream levels rose.

Early in the week, Eric sent out word that he spotted one on the property. The next day, Tom reported seeing five in the quieter part of the stream on the west end of our part. Saturday, Shawna took me down during her regular Salmon watching time. (She is a volunteer “Salmon Watcher” for a multi-juristictional partnership of local cities and King County). Armed with a camera and some very silly cardboard salmon watching glasses — they are polarized and actually help cut glare on the water — we went down to the west end of the stream.

It was not long at all and we were rewarded by spotting 3 Coho salmon. I turned on the camera and even put one of the polarizing lens from my glasses in front of the camera lens. Take a look at the video below:

It is exciting to see them after all the restoration work that was done last year. The creek is now well suited for Salmon spawning. It is hopeful to see so many this year.
– Bob