Case Study
Mittler Senior Technology achieved a 98.2% energy reduction
From an F rating to a B rating, this transformation shows how digital sustainability can cut emissions, energy use, and water consumption at scale.
Custom web development
For Mittler Senior Technology, we reworked the website structure and front-end experience to create a cleaner, lighter, and more efficient digital build aligned with both usability and sustainability goals.
Accessibility audits
We reviewed the Mittler site for accessibility-related issues and helped shape improvements that supported clearer navigation, better readability, and a more inclusive experience across devices.
Sustainability audits
We measured the environmental footprint of Mittler Senior Technology’s website and identified the technical changes that contributed to major reductions in carbon emissions, energy use, and water consumption.
Performance optimization
For this case study, we improved load efficiency and reduced unnecessary weight across the site, helping move Mittler Senior Technology from a much heavier setup to a faster and more technically efficient website.
SEO and digital visibility
Alongside performance and structural improvements, this work strengthened the technical foundation of the Mittler Senior Technology site, supporting better discoverability, indexing, and overall digital visibility.
The world’s premier computer and smartphone education service for senior citizens
Mittler Senior Technology helps older adults build confidence with computers, smartphones, and the digital tools they use every day. Run entirely by high school and college students, the organization combines intergenerational learning with practical technology education to create meaningful impact for seniors and youth alike.
3,500+
Seniors impacted
450+
Classes taught
150+
Teens inspired
10+
Countries reached
Measured reductions
Proven environmental improvements
The Mittler Senior Technology website redesign delivered major measurable reductions across carbon emissions, energy use, and water consumption.
98.2% Energy reduction
Energy use per visit fell from 0.0139 kWh to 0.0002 kWh through a more efficient website build.
98.1% Carbon reduction
CO₂ per page visit dropped from 5.31g to 0.10g, dramatically lowering the website’s environmental impact.
98.1% Water reduction
Water consumption per visit decreased from 2.95L to 0.06L, showing the wider resource savings of optimization.
Before & After Audit
A simpler view of the transformation
Compare the website before and after Oasis of Change’s redesign to see how efficiency and sustainability improved.
A heavier, less efficient website
The earlier version required more energy, produced more emissions, and used more supporting resources per page visit.
Why it mattered
Dirtier than 98% of web pages globally
- Carbon per visit
- 5.31g CO₂
- Energy per visit
- 0.0139 kWh
- Water per visit
- 2.95L
- Carbon rating
- F rating
- Among the worst-performing pages measured
Based on Website Carbon Calculator measurements comparing the previous and redesigned versions of mittlerseniortech.com.
Key learning
Even though the website was already using “green” hosting, it was still not sustainable. Large images, unnecessary code, and heavy page files meant it used far more energy, water, and carbon emissions than needed.
Before & After Audit
A visual look at the redesign
Drag the slider to compare the previous Mittler Senior Technology website with the redesigned version by Oasis of Change.
Comparing both versions
Drag the handle (or use arrow keys on the slider) to compare before and after views.
Impact Equivalents at 10,000 Monthly Page Views
What those reductions look like in real-world terms
These figures show how the website’s measured per-visit reductions in carbon emissions and energy use add up over a year, at 10,000 monthly page views — 120,000 a year, the Website Carbon Calculator’s default traffic assumption. 1
CO₂ equivalent
98.1% lower- Before
- 637 kg
- Grade F
- After
- 12 kg
- Grade B
Energy consumed
98.2% lower- Before
- 1,662 kWh
- Higher electricity demand
- After
- 30 kWh
- Much lighter site build
Tea-boiling equivalent
98.1% lower- Before
- 86,309
- cups equivalent
- After
- 1,622
- cups equivalent
Smartphone charging equivalent
98.2% lower- Before
- 138,518
- equivalent charges
- After
- 2,473
- equivalent charges
Trees needed to absorb the emissions
At 10,000 monthly page views (120,000 a year)
- Before
- 29
- trees needed
- After
- Under 1
- trees needed
Key takeaway
At 10,000 monthly page views, Mittler Senior Technology went from producing over 630 kg of CO₂ a year to about 12 kg, and from needing 29 trees to absorb that impact down to less than one.
Testimonial
“Oasis of Change transformed our website into a cleaner, more modern, and more accessible platform. Their work significantly improved the user experience, especially for seniors, while also bringing a valuable sustainability perspective to our digital strategy.”
Jordan Mittler
Director & Founder, Mittler Senior Technology
1. Notes
Core figures such as CO₂ equivalent and energy consumed reflect the primary environmental results. Other figures, including tea-boiling equivalent, smartphone charging equivalent, and trees needed, are illustrative conversions based on Website Carbon’s methodology and are included to help make the scale of impact easier to understand. Per-visit figures are measured. Annual figures are modelled from those measurements at 10,000 monthly page views — 120,000 a year, the Website Carbon Calculator’s default traffic assumption — rather than Mittler Senior Technology’s actual traffic. Tree figures assume a mature tree absorbs about 22 kg of CO₂ a year.