I love showing homes in Arvada’s Geos Community to buyers individually, but there’s a live Zoom presentation sponsored by First Universalist Church of Denver next week which will teach you all you need to know about this great community.
The homes and townhouses in this community are not only “net zero,” they are “net positive,” creating more energy than the homeowners use, including when they charge an electric car. The homes are so well insulated that they need no furnace, only a CERV, which also monitors and maintains indoor air quality.
Regular readers of this column know my commitment to sustainability. Our office is Net Zero Energy, with our 20-kilowatt solar PV system providing all the energy to heat, cool and power our office plus charge our four electric cars, while also providing free charging to the public. My home is also solar powered, satisfying all our electrical needs, although we still have natural gas service.
Readers may also recall me saying that the most affordable way to invest in sustainable features is to buy a home which already has them, since the investment in sustainability pays for itself over time but rarely returns what you paid for it in the resale value of your home.
The home I just listed at 6187 Terry Way in Arvada’s Sunrise Ridgesubdivision is a good example of that. The seller, like me, is fanatical about sustainability and has invested over $80,000 in solar power, insulation, daylighting, and other improvements, but the listing price of $450,000, while higher than for a comparable home with a higher monthly energy bill, recovers for the seller only a fraction of her investment.
Meanwhile, whether or not you are interested in purchasing a terrific 2-bed-room patio home, let me use it as an example of the ways you can invest in sustainable features for your own home.
I’ve written in the past about Steve Steven’s 1970s brick ranch which he took beyond Net Zero. I did a narrated video tour of it when it was on the annual tour of solar homes, and it took over 40 minutes to describe all its sustainable features!
This home, however, is a 2002 frame-built tract home that was constructed with above-average but below-optimum energy and insulation features, leaving plenty of room for improvement. And improve it the seller did! (You’ll understand why, knowing that she is Steve Stevens’ significant other!)
What follows is a run-down of the improvements which brought this home’s electrical bill down to the cost of its connection to Xcel Energy’s grid. In fact, the home is beyond Net Zero Energy to Net Carbon Positive, meaning that its excess electrical generation more than compensates for the natural gas being used for cooking and heating. On top of that, the seller charges her electric car in the home’s 2-car garage.
Here are the sustainability highlights:
First, of course, a 4.4-kilowatt solar photovoltaic system was installed on the roof. Having done that, the next tasks involved reducing electrical demand so that 4.4kW of solar PV would be sufficient.
Of course, all incandescent, fluorescent and CFL light bulbs were replaced with LED bulbs and fixtures. That alone reduced the electrical load substantially.
Next, five 14- and 22-inch diameter Velux sun tunnels were installed, bringing natural light into all the rooms, nearly eliminating the need for artificial lighting except at night.
Next, all the appliances, including the central A/C unit, were replaced with high efficiency Energy Star-rated models. In the case of the kitchen appliances, they are all stainless steel.
At this point, the electrical efficiency was pretty much maxed out, so attention was given to reducing the natural gas load for heating the home.
Additional cellulose insulation was blown into the attic, bringing it up to an R-100 rating — more than twice what you’ll find in the typical production home. We have a picture of this home after a snow storm, showing the snow melted off the roofs of neighboring homes but not off this home’s roof — clear evidence of good attic insulation.
The rim joist (accessible because the basement is unfinished) was insulated to R-50. This area of the house, I’ve found, is the most neglected area of any house when it comes to insulation. It’s where the joists for the main floor sit on the home’s foundation. Most home builders stuff some fiberglass insulation between the joists, but they don’t enclose that fiberglass in plastic. Cold winter air easily infiltrates through loose fiberglass insulation. It’s the plastic sheeting which stops that air. And closed-cell foam sprayed between the joists further inhibits air infiltration.
Next, the windows and patio door were replaced with Energy Star-rated Champion products. Improving the windows further was the installation of insulating Hunter Douglas blinds.
Those are the improvements which made the home more energy efficient, bringing it past New Zero Energy. Other improvements worth noting which add value to this home are the large deck with seating on the sunny south side of the house, the beautiful oak Murphy bed with wall storage in the guest bedroom which allows the bedroom to be used as an office, and the 240-Volt wiring in the garage to provide EV charging.
Since this is a “paired home,” the party wall already had double-wall construction with insulation which reduced the transmission of noise between the units, but my seller added a third wall which consumed 5 inches on the her side of the party wall, into which cellulose insulation was blown, creating an even better sound barrier.
I hope this article has inspired you to improve the energy efficiency of your own home, even if it hasn’t inspired you to call your agent or me at 303-525-1851 to arrange a private showing!
The typical American home is powered electrically but heated by natural gas, propane or other fossil fuels. You and I can generate our own electricity with solar panels, but there’s no way for us to generate natural gas or other fossil fuel energy, so the transition to a “net zero energy” lifestyle necessitates turning away from fossil fuels and going all-electric.
Fortunately, technology has advanced — just in the last decade — to the point where going all-electric is totally practical, affordable, and a way you and I can mitigate climate change
At Golden Real Estate, our office was heated with natural gas until November 2017, when we installed a heat pump “mini-split” system and had our natural gas meter removed. With 20 kilowatts of solar photovoltaic panels, we were able to eliminate our natural gas bill but not increase our electric bill. We continue to pay just $11 per month to be connected to the electric grid (which functions as our “battery” thanks to net metering), but we are generating all the electricity needed to power, heat and cool our office building. We even have enough electricity from the solar panels to power our four electric cars without buying any net electricity from Xcel Energy. We hope other businesses will follow our lead.
Making the switch to all-electric at home is still in our future, because — like you, I suspect — we prefer gas cooking, gas grilling, and having a gas fireplace.
If, however, we can get beyond those preferences, it is possible now to heat our home and domestic hot water using heat pump appliances, and to cook our food with electric or induction cooktops and ovens. Electric grilling is also available, although not as attractive from a taste standpoint to most of us.
All-electric homes was the subject of a talk by architect Peter Ewers at last week’s meeting of the Colorado Renewable Energy Society’s Jeffco chapter. You can view an archived video of Peter’s talk at www.cres-energy.org/video.
Once we have removed gas service from our homes (and gas cars from our garages), we will have also eliminated the risks of explosion and carbon monoxide poisoning, too. Wouldn’t that be great?
As you may already know, Golden Real Estate is a leader in sustainability, as expressed in the value statement printed on all our yard signs: “Promoting and Modeling Environmental Responsibility.” And most of our agents, including myself, are Certified EcoBrokers, having taken extra training in all aspects of sustainability as it applies to real estate.
We’d like to share what we’ve learned with you, so we’re launching a Sustainability Series that will take place on the third Thursday of every month in our office. We can accommodate 20 or more attendees in our office, but we will move it elsewhere if the demand exceeds our capacity, so please RSVP. You can do so now for all sessions.
Each meeting will focus on a single aspect of sustainability. Here’s the schedule for the first six meetings (subject to change):
Jan. 17th — Home Insulation — Walls, windows, foundations, crawl spaces, attics. (This is a bigger topic than you might think, but it’s also the cheapest and most effective path to reducing energy consumption.)
Feb. 21st — Home Heating Methods — Forced air, heat pumps, radiant floor, solar thermal, and other technologies.
Mar. 21st — Solar Power — Rooftop and ground-mounted photovoltaic, solar gardens, solar panels vs. solar roof tiles, and home battery storage/backup.
Apr. 18th — Electric Vehicles — What’s here now and what’s coming soon in cars, trucks, motorcycles and more.
May 16th — Sustainable Renovation — What are the more sustainable and popular materials and designs?
June 20th — Water Conservation — The latest concepts and products for conserving water use, both indoors and outdoors.
All sessions are 1 hour long and begin at 5 p.m. in our Golden office or nearby if a larger space is needed based on the number of reservations received. The sessions will be led by experts in the field, although you can count on me to add my own comments!
Go ahead and reserve your seat for any or all sustainability sessions now by sending an email to Jim@GoldenRealEstate.com. We look forward to producing this informative series!
Golden Real Estate’s Sustainable Practices
1) Our office produces more energy than it consumes. With our 20 kW of solar panels, we heat, cool and power our office and charge our six electric cars. We also provide free EV charging to the general public, yet our Xcel Energy bill is only $11.26/month. At our request, Xcel removed our natural gas meter.
2) We accept polystyrene from the public in our “Styrofoam Corral,” keeping over 200 cubic yards of the material out of the landfill every year.
3) We use only LED light fixtures and have four “sun tunnels” (skylights) for naturally lighting our office.
Click here to read about our transition to “Net Zero” in our Jan. 4, 2018, column, “Promoting & Modeling Environmental Responsibility.”