CARBONLESS BUILDER™
Corporate Sustainability Partners
carbonless.org | hello@carbonless.org
THE MATH NOBODY IN SUSTAINABILITY CAN IGNORE
450 metric tons of CO2 saved per home
Not estimated after the fact
Not calculated from averages
Not a projection based on modeling
Calculated before the first nail goes in
That number comes from a real house in climate zone 3A — Ringgold, Georgia
Compared to the code-built house sitting directly behind it
Same neighborhood. Same weather. Same year built.
The neighbor's home was modeled as it was being constructed — using the same Manual J methodology applied to the Carbonless Builder Standard home next door. The physics does not require an invitation.
450 metric tons of operational CO2 difference. Verified.
It will be lived in. It will be occupied. And there is nothing anyone can say about it.
WHAT THAT MEANS AT SCALE
1,000 homes built to the Carbonless Builder Standard
450,000 metric tons of CO2 eliminated
Before a single solar panel is installed
Before a single carbon credit is purchased
Before a single offset is negotiated
Just physics. Applied correctly. At the design stage.
Before the hole is dug.
CODE-BUILT HOME vs. CARBONLESS BUILDER STANDARD
Two neighboring homes. Different sizes. Same climate. Same neighborhood. Modeled by Manual J — the ACCA standard for heating and cooling load calculations — one before construction began, one as it was being built.
Brian Iverson's home: 1,200 sq ft. The neighbor's home: 1,400 sq ft. The national average new single-family home is 2,386 sq ft. The performance gap on a typical new construction home could be even larger.
Climate Zone 3A, USA | 9-foot ceilings
WALL ASSEMBLY U-VALUE
Code-built home: 0.060 to 0.100 (R-10 to R-17 effective)
Carbonless Builder Standard: 0.033 or better (R-30+ effective)
CEILING U-VALUE
Code-built home: 0.030 to 0.038 (R-26 to R-33 cavity only)
Carbonless Builder Standard: 0.014 or better (R-70+ effective)
Note: R-38 is the code minimum ceiling cavity requirement in this climate zone — but thermal bridging through framing reduces real-world performance significantly. More critically, the code-built home has its entire ductwork system located in the attic. In summer that attic reaches 130 to 140 degrees Fahrenheit. Every foot of duct running through that superheated space is a direct energy penalty — the HVAC system fights itself before conditioned air ever reaches a single room. Brian Iverson grew up in Minnesota. He had never seen a duct system like this before moving to Georgia to be near his grandchildren. He knew how to fix it in about two seconds. In the Carbonless Builder Standard home every duct is located inside the conditioned envelope. The attic problem does not exist.
WINDOW U-VALUE
Code-built home: 0.30 to 0.45
Carbonless Builder Standard: 0.25 or better — triple glazed
AIR LEAKAGE
Code-built home: 3 to 5+ ACH50
The entire volume of the house exchanges
with outdoor air up to 5 times per hour
Carbonless Builder Standard: 0.5 ACH50 or better — 10 times tighter
SLAB EDGE
Code-built home: Uninsulated or minimally insulated
Carbonless Builder Standard: Continuously insulated, minimized F-factors, full thermal break
THERMAL BREAKS
Code-built home: None on most assemblies
Carbonless Builder Standard: 100% continuous on all six sides
MONTHLY UTILITY PAYMENT
Code-built home: Approximately $350 per month
Carbonless Builder Standard: Approximately $100 per month
Monthly difference: $250
Annual difference: $3,000
Over 100 years at 3% annual energy cost escalation: More than $550,000 per home
Source: Manual J load calculations performed per ACCA standards for two neighboring single-family homes in Climate Zone 3A, Ringgold Georgia. Brian Iverson's Carbonless Builder Standard home: approximately 1,200 sq ft, thermally broken on all six sides. The neighboring code-built home: approximately 1,400 sq ft — the worst-performing residential building envelope encountered during five decades of field work in any climate zone. It will be lived in. It will be occupied. And there is nothing anyone can say about it. Sensible and latent loads calculated separately including two slab edge F-factors for insulated and uninsulated perimeter conditions. National average home size 2,386 sq ft per NAHB/U.S. Census Bureau Quarterly Starts and Completions 2025. National average site energy 76.8 million BTU per year per EIA Residential Energy Consumption Survey 2020, eia.gov/consumption/residential. Energy cost escalation based on 3% annual increase consistent with 50-year historical average per EIA historical data. CO2 savings represent operational carbon only over 100-year building life.
RETURN ON INVESTMENT — 7 YEARS OR LESS
Seven years is not an arbitrary benchmark. It is the standard threshold used by the utility company — Northern States Power, now Xcel Energy — to qualify energy efficiency improvements for rebate programs back in the 1980s. Brian Iverson learned this standard in 1980 when he completed his energy auditor certification and began running load calculations professionally. If the investment did not pay back within 7 years the improvement was considered economically unjustifiable and the rebate was denied.
The Carbonless Builder Standard is designed to meet that threshold in every scenario. But at the end of the day the payback period depends on the products selected and the decisions made by the builder and the buyer. That is exactly why manufacturer independence matters. Nobody should be steering those product decisions except the physics.
At $10,000 additional construction cost over code minimum:
$10,000 divided by $3,000 annual savings = 3.3 year payback
At $15,000 additional construction cost:
$15,000 divided by $3,000 annual savings = 5.0 year payback
At $20,000 additional construction cost — the most conservative estimate:
$20,000 divided by $3,000 annual savings = 6.7 year payback
Every scenario comes in under 7 years. Every single one.
And that is before energy costs increase. At 3% annual escalation the payback period gets shorter every year that passes.
After payback is achieved every dollar saved is pure Return on Efficiency™ for the remaining life of the structure.
That is not a return on investment.
That is Return on Efficiency™ — and it is generational.
Note: Brian Iverson's own Thermal Suite achieved the Carbonless Builder Standard at zero net additional cost — a standard $18,000 HVAC system was replaced with three mini splits for $5,300 and the $12,700 difference was reinvested directly into envelope improvements. Net additional cost: zero dollars.
Seven-year payback threshold per Northern States Power/Xcel Energy energy efficiency rebate qualification criteria, 1980s program standards.
THE PROBLEM THE BUILDING INDUSTRY HAS NEVER SOLVED
A utility payment of $300 per month today is potentially $1,000 per month in 30 years — based on the last 50 years of energy cost history.
Affordable housing is not just about the purchase price of the home. It is about whether the owner, the occupant, and the tenant can afford to live there month after month, decade after decade, generation after generation.
The building industry has never been held accountable for what happens after closing day. Embodied carbon gets checked off at closing and nobody measures what comes next.
The Carbonless Builder Standard measures what comes next
Every month
For the life of the building
For 100 to 200 years
EMBODIED CARBON vs. OPERATIONAL CARBON — THE FULL EQUATION
Embodied carbon measures the carbon cost of manufacturing and transporting the materials used to build a structure. It is a one-time calculation. It ends the day construction is complete.
Then the building starts operating — for 100 to 200 years — and nobody measures what happens next.
The average new home generates approximately 30 to 50 metric tons of embodied CO2 to build it. That number ends at closing.
The Carbonless Builder Standard saves 450 metric tons of operational CO2 over 100 years compared to the average code-built home. That number compounds every single month.
450 metric tons saved is nine times the carbon cost of building the house itself.
Saved. Every home. Before the first nail goes in.
Embodied carbon is a one-time check mark paid at closing
Operational carbon is a payment made every single month for the next 200 years
The Carbonless Builder Standard calculates both — before the hole is dug.
THIS IS NOT THEORY
Brian Iverson has been on jobsites since 1974.
Degreed in architecture and civil engineering
Former Certified Energy Auditor — Northern States Power, Minnesota
Designer of 750+ homes that were actually built
Over 2,000 closed real estate transactions for first-time affordable housing buyers using MFHA, FHA, and VA financing
51 years in the field
He invented and patented five construction technologies — Tstud™, TSUPS™, WarmStud™, DrainStrip™, and TwinBeam™ — and then walked away from manufacturer representation entirely so he could speak freely about what works and what does not without a brand telling him what to say.
He does not work for a manufacturer
He does not take sponsorships
He does not accept paid endorsements
When something performs it belongs here
When it does not it does not
That independence is the whole point.
He built his own home to the Carbonless Builder Standard in climate zone 3A. 1,200 square feet. Under $50 a month in utilities for the first six months. Thermally broken on all six sides. Manual J completed before construction began. An $18,000 HVAC system replaced with three mini splits for $5,300. The difference reinvested into the envelope.
That is not a case study. That is where he lives.
WHY THIS PROGRAM NEEDS FINANCIAL SUPPORT
The Carbonless Builder Standard can pay for itself in 7 years or less.
But the payback period depends entirely on which products are selected to meet the Standard.
Brian Iverson does not represent any manufacturer.
He does not sell any product.
He does not receive commissions, royalties, or endorsements from any brand.
That independence is not a feature of this program.
It is the entire point.
Because the only person who can teach a builder or a homeowner how to hit the Standard with the products available in their market, at their budget, with their crew — without a manufacturer telling them what to buy — is someone who has no financial interest in what they choose.
That person does not exist anywhere else in this industry.
That is Brian Iverson.
And that is why this program needs financial support.
Not to build a product
Not to fund a factory
Not to launch a brand
To fund the education that removes the manufacturer from the conversation entirely.
So that every builder in North America can hit the Carbonless Builder Standard with whatever products are available to them.
And every family living in those homes gets the utility bill that physics always promised was possible.
WHAT A PARTNERSHIP LOOKS LIKE
There is no off-the-shelf sponsorship package here. No naming rights on a building. No logo placement in exchange for a check.
This is a direct conversation between your sustainability team and one person who has spent 51 years solving the problem you are trying to fund.
Corporate sustainability partners will be recognized on carbonless.org — the platform reaching 64,000+ organic followers and 25 million combined views across Instagram, Facebook, and YouTube with zero paid promotion.
Carbonless Builder Standard members — builders and professionals who meet the Standard — will be listed in a searchable directory on carbonless.org so that homeowners, developers, and project owners can find qualified builders in their market.
If your organization is committed to measurable verified CO2 reduction in the built environment and you want a partner who can produce a number per home before construction begins — this is worth a conversation.
If you need a story about families in affordable housing whose utility bills were cut in half and whose homes will still be performing in 2126 — this is worth a conversation.
If you want to fund the education that changes how an entire generation of builders builds — this is worth a conversation.
HOW TO REACH BRIAN DIRECTLY
No form
No assistant
No automated response
Brian reads every email personally and responds the same way.
Carbonless Inc. is a registered 501(c)(3) nonprofit organization. Contributions may be tax deductible. Consult your tax advisor.
Carbonless Builder Standard specifications: wall assembly U-value 0.033 or better, ceiling U-value 0.014 or better, windows U-value 0.25 or better, whole-building air leakage 0.5 ACH50 or better, continuous thermal break on all six sides, Manual J completed at design stage before construction begins.
ROI calculation based on Manual J modeled utility savings of $250 per month comparing Carbonless Builder Standard home to code-built home in Climate Zone 3A. Additional construction cost estimate of $8,000 to $20,000 over code minimum based on field experience. Actual ROI will vary by climate zone, material costs, builder experience, and local energy prices. At 3% annual energy cost escalation consistent with 50-year historical average the payback period shortens each year after construction.
Seven-year payback threshold per Northern States Power/Xcel Energy energy efficiency rebate qualification criteria, 1980s program standards.
Return on Efficiency™ — it's generational | carbonless.org