When we visualize environmental pollution, our minds automatically drift to dramatic images. We think of gridlocked highways packed with thousands of cars idling in traffic, or massive industrial factories with towering smokestacks pouring thick, dark clouds into the sky. We almost never look at a beautiful luxury apartment building, a brick-and-mortar housing co-op, or a modern downtown office building and see an environmental hazard. Because buildings just sit there quietly, they seem entirely harmless to the planet.
This oversight is exactly what Jeffrey Carleton, CEO of Runwise, set out to change. The reality of urban geography tells a completely different story than most people realize. In major metropolitan areas like New York City, Chicago, Boston, and Washington, D.C., buildings are not just minor contributors to the climate crisis; they are the primary driver. In these heavily populated concrete jungles, the energy required to heat, cool, light, and run water through residential and commercial properties accounts for nearly 70% of all urban greenhouse gas emissions. This means the built environment dwarfs the carbon footprint of cars, trucks, trains, and planes combined.
The core of this problem does not sit on the roof or in the design of the windows. It is buried deep underground in the dark, hot, and forgotten basements of these structures. Millions of multi-family apartment buildings across the country rely on heavy industrial heating and cooling systems that are fundamentally out of date. These massive fossil-fuel boilers operate using technology that has not changed in any meaningful way since the middle of the twentieth century. They run blindly, pumping massive amounts of heat into a building regardless of the actual temperature inside the living rooms or the fast-changing weather patterns outside. This massive technological gap creates billions of dollars in economic waste every single year, while quietly driving up global carbon emissions. It is a massive sustainability crisis hiding in plain sight under the very floorboards of our homes, and it represents the exact operational challenge that Jeffrey Carleton, CEO of Runwise, has committed his career to solving.
The Outdated Basement Blueprint
The real estate industry faces a massive structural problem that threatens both its financial survival and its environmental compliance. Property owners are forced to rely on obsolete mechanical machinery to meet modern, twenty-first-century environmental standards. For generations, managing the climate inside a large apartment building meant using a primitive approach. A property manager or a building superintendent would go down to the basement and set a mechanical timer. This timer told the boiler to turn on at a specific hour in the morning and run at a fixed, maximum strength for a set period of time.
This rigid approach does not account for any real-world variables. On a mild, sunny autumn afternoon, a building’s boiler might blast steam heat at maximum capacity simply because the calendar says it is November. The system has no idea what the weather is actually doing outside, nor does it know how hot it is inside the actual apartments. Because the system is completely blind, it consistently overheats properties to extreme degrees.
To cope with the resulting indoor heat waves, tenants across major cities regularly open their windows wide in the dead of winter just to cool their apartments down to a livable temperature. This creates an absurd, unsustainable cycle. Building owners are spending thousands of dollars burning expensive heating oil or natural gas, only for that energy to be vented straight out of open windows into the freezing air. This systemic waste carries heavy financial consequences. Real estate operators watch their profit margins vanish into skyrocketing utility bills. At the same time, municipal governments are passing strict environmental laws, such as New York City’s Local Law 97, that penalize inefficient properties with massive carbon fines that can total tens of thousands of dollars annually.
Upgrading this infrastructure traditionally required ripping out ancient steel pipes, running miles of complex electrical wiring through concrete walls, and spending hundreds of thousands of dollars on brand-new physical hardware. Faced with these massive capital expenses and months of construction delays, most property managers historically chose a painful path. They simply paid the high fuel bills, absorbed the environmental penalties, and passed the costs down to tenants through higher rent. The real estate market desperately lacked an accessible, cost-effective bridge that could connect old, mechanical industrial machinery with the modern digital world.
From Property Manager to Tech Innovator
Before becoming a tech entrepreneur, Jeffrey Carleton spent years watching this expensive, frustrating waste unfold from the front lines of the real estate industry. An alumnus of Brown University, Jeffrey Carleton graduated with a degree in business and managerial economics. This academic background gave him a deep understanding of market mechanics, financial models, and data-driven problem-solving. Instead of taking a traditional corporate finance path, Jeffrey Carleton immersed himself directly in the practical, hands-on world of urban real estate operations.
He built his early career managing large, complex real estate portfolios in highly competitive urban markets. Jeffrey Carleton served as the General Manager at Beach Lane Management, a prominent real estate firm where he directly oversaw the operations of more than 150 buildings. In this intense role, Jeffrey Carleton was responsible for every single aspect of property operations. He managed elevator modernizations, handled complex plumbing overhauls, coordinated emergency roof repairs, and navigated tenant disputes. Most importantly, he was the person responsible for tracking and paying the astronomical electric, water, and fuel bills for the entire portfolio.
Living the day-to-day reality of a property manager gave him a unique, unvarnished perspective on the industry’s technological deficits. He saw firsthand that trying to control a building’s energy consumption using traditional, outdated tools was a losing battle. He refused to accept the status quo and began experimenting with early technology solutions. However, the online monitoring tools available at the time required tedious phone-line connections that only let him check one building at a time, making the process painfully slow and counterproductive for a large portfolio. Rather than giving up, Jeffrey Carleton turned to alternative weather-actuated controls that could predict a building’s heat requirements based on outdoor conditions. This early breakthrough proved that making smart, systemic adjustments to operational controls could yield massive returns without requiring a million-dollar physical overhaul. He realized that the real estate industry did not actually need more expensive new boilers; it needed an intelligent, responsive digital brain to run the equipment it already had in place.
Turning Frustration into Action
The core motivation for Jeffrey Carleton to transition from property manager to CEO of Runwise did not come from an abstract academic interest in climate change. It came from years of personal frustration and operational headaches. As a building operator, Jeffrey Carleton spent his winter months trapped in a reactive nightmare. His phone would ring off the hook with frantic, angry calls from tenants. In the exact same building on the exact same morning, a tenant on the first floor would be freezing in their bed, while a tenant on the top floor was sweating profusely in an apartment that felt like a sauna.
He spent hours analyzing spreadsheets of utility bills, filled with a deep sense of irritation because he knew that a massive portion of the fuel his company purchased was being wasted entirely due to bad data and rigid, blind mechanical controls. The property management industry was completely trapped in a backward, reactive loop. Operators only discovered a major boiler failure, a heating malfunction, or a massive water leak after a resident called to complain, or worse, after a basement completely flooded and caused thousands of dollars in property damage.
Jeffrey Carleton grew determined to change this archaic dynamic permanently. He wanted to build an automated, data-driven system that would allow a property manager to look across thousands of scattered buildings on a single digital screen, see exactly how they were performing in real time, and cut energy waste automatically before it ever happened. He wanted to make buildings run more smoothly, make apartments genuinely comfortable for the families living inside them, and prove to skeptical landlords that environmental sustainability did not have to be an expensive chore. Instead, it could be a highly profitable investment that directly improved a building owner’s bottom line.
Building the Brain for Buildings
To turn this ambitious vision into reality, Jeffrey Carleton decided to step away from traditional property management. He assumed his role as CEO of Runwise, teaming up with technology entrepreneur Lee Hoffman and growth strategist Michael Cook to co-found the enterprise. The founding team set out with a clear mission: to completely transform how urban building infrastructure is managed by introducing an end-to-end smart control platform. They did not want to manufacture heavy industrial machinery or sell multi-million dollar boilers. Instead, under Jeffrey Carleton’s executive guidance, Runwise designed an intelligent building controller paired with an ultra-low-power wireless sensor network.
The core strategy behind the Runwise platform focused on three main elements: speed, affordability, and deep computational intelligence. The team worked tirelessly with product designers to create a modular hardware platform that field technicians could install in less than a day. This rapid installation avoided the weeks of messy labor, tenant disruption, and miles of complex wiring that defined traditional building retrofits.
The technology works through a clever distribution of data points. Technicians place small, discreet, long-range wireless sensors directly inside a representative sample of apartments throughout a building. These sensors constantly monitor internal temperature levels to map the home’s heating profile, while specialized monitoring hardware tracks mainline water usage, gas loops, and boiler pressure in the basement. All of this real-time data is beamed wirelessly and fed directly into a centralized cloud-computing platform.
By pairing this live internal data with forward-looking local weather forecasts and advanced machine learning models, the Runwise platform acts as an autonomous pilot for the building. The system adjusts boiler activity and valve settings minute by minute. If the cloud platform sees that a sudden warm front is moving into the city, or that the indoor sensors show the apartments are perfectly warm, it automatically dials back the boiler. If a cold snap hits, it ramps up the system precisely when needed. This creates a balanced, highly responsive ecosystem that matches energy output exactly to the real-time needs of the structure.
Overcoming Skepticism and Scaling Up
Building a hardware-enabled software company in a traditional, old-school industry like real estate brought massive challenges. The real estate sector is historically slow to adopt new technology. Property owners and corporate landlords are notoriously conservative and deeply wary of unproven systems. They are especially hesitant to hand over control of critical utilities like heat and water to an automated computer program, knowing that a system failure could leave thousands of tenants without heat in sub-zero temperatures.
In the early days of the company, Jeffrey Carleton, CEO of Runwise, and his team had to fight for every single installation. They had to prove their technology’s value building by building, block by block, across the intensely competitive New York City market. They overcame this deep-seated industry skepticism by delivering undeniable, consistent financial results. The Runwise system routinely cut heating and fuel costs by an average of 21% to 25% within the first few months of installation.
As these massive financial savings accumulated, word of mouth spread through the real estate community, and the company gained significant momentum. Under his leadership, Runwise expanded its geographic footprint from its initial New York base to other major, weather-sensitive metropolitan hubs, including Boston and Chicago. They scaled their technology to support over 10,000 buildings, proving that their software could handle everything from historic pre-war brick buildings to modern, glass-and-steel commercial high-rises.
This steady, impressive operational growth caught the attention of top-tier institutional venture capital firms. Runwise successfully raised a total of $79 million in capital funding. This capital runway was highlighted by a major $55 million Series B funding round led by Menlo Ventures, alongside prominent real estate and climate tech investors like MassMutual Ventures, Nuveen Real Estate, Multiplier Capital, and Munich Re Ventures. This massive injection of capital allowed Jeffrey Carleton to rapidly expand his engineering teams, scale field operations, and deploy smart controllers to a much wider variety of commercial, residential, and affordable housing properties across the entire United States.
Making Efficiency Profitable
Today, Jeffrey Carleton is widely recognized as a leading expert and visionary voice in the fields of property technology (PropTech) and urban decarbonization. His unique expertise lies exactly at the cross-section of practical real estate economics and advanced data science. Under his steady leadership as CEO, Runwise has completely shifted the national conversation around climate technology. He has changed it from a story of environmental sacrifice and heavy capital spending into a story of clear, undeniable financial return.
His core vision centres on optimizing existing infrastructure through intelligent software rather than forcing property owners to replace their physical systems outright. Jeffrey Carleton frequently advises corporate landlords, municipal housing authorities, and private owners that the fastest, most cost-effective path to compliance with modern emissions laws is simply running their current machinery better.
By proving that the Runwise platform can deliver up to 30% in energy savings for buildings while helping owners avoid heavy carbon fines, Jeffrey Carleton has made energy efficiency an incredibly easy financial choice. The platform has been adopted by some of the largest, most influential real estate operators in the United States, including Related Companies, Equity Residential, Douglas Elliman, and the Port Authority. By aligning environmental goals with corporate profitability, Jeffrey Carleton has turned carbon reduction into a standard business practice for the modern real estate industry.
Grounded Leadership and Accountability
The internal corporate culture and leadership style of Jeffrey Carleton, CEO of Runwise, is defined by absolute operational transparency and an intense, unwavering focus on customer service. Because he spent years managing properties himself, he possesses a rare trait in the tech industry: genuine empathy for the people who actually run buildings. He knows that real estate operators do not care about sleek marketing presentations, complex software buzzwords, or abstract tech metrics. They care about physical systems that work reliably when it is freezing outside, and they care about protecting their properties from damage.
This deep operational empathy directly informs how Jeffrey Carleton manages his enterprise. He has deliberately built a diverse team that blends brilliant Silicon Valley software engineers with veteran boiler technicians, old-school plumbers, and experienced field operations experts. He enforces an incredibly high standard of operational accountability.
He famously built the company’s service model to ensure that if a building operator or super calls Runwise at three o’clock in the morning with a heating emergency, they never get an automated machine or an offshore call centre. Instead, a real, local operations expert answers the phone, looks at the live building data, and helps solve the problem immediately. This intense level of accountability has helped Jeffrey Carleton build exceptional customer loyalty and an industry-leading retention rate. By combining advanced machine learning with reliable, round-the-clock human service, he ensures his company never loses sight of the practical, real-world realities of property management.
The Future of Autonomous Infrastructure
Looking ahead, the horizon for Jeffrey Carleton extends far beyond simple boiler controls and winter heating management. He is actively positioning himself as a transformative tech leader and CEO of Runwise to become the central, autonomous operating system for all urban building infrastructure across the globe. As cities continue to pass stricter environmental regulations and extreme, unpredictable weather patterns put massive amounts of stress on local electrical grids, the need for intelligent, real-time energy management will only become more critical.
His long-term product roadmap focuses on scaling the Runwise platform to manage cooling systems, air conditioning networks, gas lines, and water infrastructure with the exact same precision the company brought to winter heating. By expanding its domestic footprint into new climate zones and continuously training its proprietary machine learning models on billions of new ambient data points, Runwise is effectively transforming older, legacy cities into highly efficient, interconnected smart networks.
At Modern Construction 360, we follow these shifts closely because they represent a fundamental change in how our built environment operates. Under Jeffrey Carleton’s steady and practical guidance as CEO, the company is proving to the world that the path to a cleaner, more sustainable planet does not require tearing down our old cities and rebuilding them from scratch. Instead, the revolution starts by going into the basement and giving the buildings we already live and work in the digital intelligence they need to run themselves responsibly.
