Buildings are getting a high-tech makeover! Runwise, a New York-based startup, just nabbed $55 million—$30 million in Series B funding and $25 million in debt—to supercharge its smart platform that cuts energy costs and carbon emissions. Installed in over 10,000 U.S. buildings, Runwise’s tech has already saved $115 million in energy bills and slashed emissions equal to 100,000 cars off the road. With big plans to grow globally, this could redefine how we run our cities, but can it outpace the sluggish real estate world?

What’s the Deal?

Buildings guzzle energy—45% of city emissions come from them, often using clunky 1960s tech. Runwise, founded in 2010 by Jeff Carleton, Lee Hoffman, and Michael Cook, swaps that for a smart system blending wireless sensors, hardware, and cloud software. It automates heating, cooling, water, and electric systems, slashing energy use by up to 30% and paying for itself in under five months. The $55 million, led by Menlo Ventures with debt from Multiplier Capital, will fuel new markets, team growth, and AI-driven upgrades. “We’re rebuilding buildings with software, not bricks,” says Hoffman. Clients like Related and Equity Residential are already saving big.

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Who’s Feeling the Impact?

This is huge for property managers and owners of the U.S.’s 12 million buildings, especially in cities like New York facing strict climate laws. Tenants in Runwise’s 10,000+ buildings—serving 1,000+ customers like the MTA and National Grid—enjoy cozier spaces and lower costs. City dwellers benefit from cleaner air as emissions drop. Real estate firms save millions, with First Service Residential reporting 30% energy cuts in 150 buildings.

“It’s a win for wallets and the planet,” says John Skipper of First Service.

Even investors like Nuveen Real Estate see Runwise as a bet on greener, smarter cities.

Why It’s Awesome?

Runwise’s tech is like giving buildings a brain! Its sensors monitor real-time temps, while AI optimizes boilers and HVAC, cutting waste fast. Installation takes a day, and the savings—$115 million so far—kick in quick. The platform’s saved emissions rival taking 100,000 cars off roads, and its vertical integration—owning hardware to software—keeps results tight. The catch? Real estate’s slow to adopt tech, and upfront hardware costs could strain growth if supply chains hiccup.

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Why It Matters?

Buildings are climate culprits, and with 80% of folks wanting greener cities, Runwise’s timing is spot-on. Urban emissions, especially from old infrastructure, are a $10.5 trillion decarbonization challenge. Runwise’s tech, already in 10 states, offers a no-brainer fix—20-30% energy savings and compliance with laws like NYC’s Local Law 97. It’s feeding a $50 billion smart building market while making rentals more affordable.

“Most buildings waste billions on outdated systems,” says Carleton.

This could spark a wave of software-driven retrofits, especially as AI makes buildings even smarter.

What’s Next?

Runwise’s eyeing global expansion, targeting Europe and Asia where energy costs are soaring. They’re doubling down on AI to predict and prevent system failures, and expanding into water and electric systems. With $79 million total funding, they’re hiring fast and chasing the 50 million buildings worldwide. Rivals like BlocPower push pricier retrofits, but Runwise’s quick-install edge could dominate.

“We’re the future of building ops,” says Mike Cook.

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