How Smart Buildings Can Reuse Bitcoin Mining Heat

Bitcoin (BTC ) mining has long been criticized for its tremendous electricity consumption, with much of the energy ultimately released as heat. This heat has typically been treated as a byproduct, removed through cooling systems to prevent mining rigs from overheating. But research suggests that this heat doesn’t have to be wasted; rather, it can be a valuable energy resource.

As buildings face rising energy costs and pressure to cut emissions, and miners face rising electricity bills and public scrutiny over their energy footprint, pairing smart building energy management with cryptocurrency mining heat recovery offers an attractive solution.

By scheduling miners around renewable availability, electricity prices, and building heat demand, operators could monetize computation while simultaneously lowering heating costs and reducing unnecessary grid consumption, essentially turning waste heat and load flexibility into additional sources of return on infrastructure.

Why Bitcoin Mining Belongs in Smart Buildings

Everything is getting smart, from phones to cars, grids, farms, and even buildings, and smart buildings are no exception. These structures utilize advancements in technology to improve how they consume, produce, and manage energy.

Unlike conventional buildings, smart buildings, also known as intelligent buildings, continuously monitor conditions like occupancy, temperature, humidity, energy use, electricity prices, renewable energy (RET ) generation, and carbon dioxide levels through an interconnected network of sensors, software, and devices. This network, along with IoT, AI, and machine learning (ML), helps automate tasks, streamline processes, enhance energy efficiency, lower operating costs, and reduce environmental impact.

Another critical component is the Building Energy Management System (BEMS), which dynamically adjusts heating, ventilation, and air conditioning (HVAC), lighting, appliances, energy storage, and other systems through one intuitive interface.

The need for energy efficiency and advancements in technology are set to expand the global smart building market from $143 billion in 2025 to $691.56 billion by 2034. Regulatory policies are also driving this trend toward smart buildings.

These efforts are driven by data showing that buildings account for around 31% of global energy-related greenhouse gas emissions. They also account for about 31% of global final energy consumption, with thermal services such as space heating and domestic hot water driving the most demand (74%) in the sector. This makes the technology not only a strategic choice but also a compliance requirement.

But none of this is without friction. Despite the benefits, smart buildings face serious obstacles such as high upfront costs, cybersecurity concerns, and legal hurdles that continue to slow widespread adoption.

A particular, recurring pain point is interoperability. Building energy management systems generally rely on open, industry-standard communication protocols, but many HVAC manufacturers build their equipment around proprietary, closed protocols, creating a communication gap between hardware and software.

Then there’s electricity demand, which varies throughout the day based on occupants’ activities, while heating and cooling requirements change with seasonal temperatures.

Renewable energy sources add yet another layer of difficulty due to the intermittency of solar and wind, which requires efficiently balancing energy flow between distributed resources, the grid, and on-site storage.

As buildings grow more connected, cybersecurity also becomes an ever more pressing concern. Addressing these gaps requires coordinated effort across regulators, technology vendors, and building owners; a technical fix alone won’t do it.

Against this landscape, digital technologies like cryptocurrency mining facilities and data centers have emerged as high-energy-density systems with substantial waste heat recovery potential.

Data centers account for about 1-1.5% of global electricity consumption, while crypto mining contributes less than 1% (about 0.5-0.7%). Crypto miners, in particular, have traditionally been seen solely as electricity-intensive computing devices whose main purpose is to secure blockchain networks while earning mining rewards.

These miners aren’t just tenants of a building, though; they represent a new category of controllable equipment. Because mining rigs can be switched on and off almost instantly and consume power in fairly predictable amounts, they fit naturally into the same demand-response logic that smart building energy management systems already use for EV chargers, batteries, and flexible loads.

But miners come with the added advantage of a continuous stream of heat. Almost all of the electrical energy consumed by mining hardware is converted into heat. If a building is equipped to capture this heat, it can offset space heating and hot water demand exactly the way a heat pump or boiler would, while generating revenue.

This dual behavior as a flexible, price-responsive electrical load and a high-grade recoverable heat source pushes cryptocurrency mining right into the center of energy discussions and smart building research. According to the latest study:

“This potential synergy between digital computing infrastructure and building energy systems provides a novel opportunity for integrated energy management.” 

So, instead of treating computing infrastructure and building systems as separate utilities, as they typically have been, the integrated approach makes crypto miners active participants in a coordinated multi-energy ecosystem alongside renewable generation, battery storage, thermal storage, electric vehicles, heat pumps, and other distributed energy resources.

How Intelligent Scheduling Unlocks the Value

The latest study titled “Optimization of building thermal and electrical energy consumption through heat recovery from cryptocurrency miners¹” puts the idea of integrating cryptocurrency mining devices (CMDs) within a smart building energy management system to a rigorous, simulation-based test.

While renewable energy integration, smart building energy management, waste heat recovery from industrial facilities, and data center heat reuse have been extensively examined, previous work has investigated these areas independently.

Crypto mining, meanwhile, has mainly been viewed either from the perspective of electricity consumption or mining profitability, with its significant thermal output receiving little attention within integrated building energy management systems.

But the authors argue that the dual functionality of miners creates an opportunity to simultaneously optimize electrical and thermal energy flows within smart buildings.

The motivation behind this study was the two underutilized characteristics combined by crypto mining devices. To address a notable gap in existing research, the authors built a Smart Building Energy Management System (SBEMS).

Existing SBEMS frameworks rarely consider mining hardware as controllable resources with simultaneous heat recovery potential, representing “a critical missed opportunity.”

To evaluate the concept, the researchers developed a mixed-integer linear programming (MILP) optimization model implemented in Python using the Pyomo framework and solved with the GLPK optimizer.

The case study models a residential complex comprising 99 apartments equipped with photovoltaic panels, wind turbines, battery energy storage, a fuel-cell-based combined heat and power unit, thermal storage, a neighborhood heat exchange network, a fleet of 99 electric vehicles (EVs), and twenty Bitmain Antminer T21 miners.

The model was also run separately across winter, spring, summer, and autumn conditions to examine how seasonal shifts in heating demand, cooling load, and renewable output change the economics of mining.

The study then compares four operational scenarios:

1. Baseline: A building with no mining hardware at all.
2. Flexible mining without heat recovery: Miners are dispatched flexibly for their electricity-cost and mining-revenue trade-offs, but their heat is wasted.
3. Flexible mining with heat recovery: The same flexible dispatch is paired with waste heat recovery, enabling mining equipment to contribute to both electricity optimization and thermal demand.
4. Always-on reference case: Every miner runs continuously around the clock regardless of price. Mining activity is not optimized per energy conditions, but the heat is still captured.

With this structured comparison, the authors were able to distinguish the benefits derived specifically from intelligent scheduling and integrated thermal recovery rather than mining itself.

The comparison between the always-on approach and the fully coordinated, heat-recovering approach is the paper’s main finding, as both scenarios use identical mining hardware and capture waste heat; the only difference is whether a controller decides when the miners should actually run. The results favor coordination. 

Across all representative seasons, the third scenario, involving an optimized, heat-recovering strategy, had the best overall performance, delivering the lowest operating cost across all scenarios and every season. It cut costs relative to always-on mining by roughly 4.4% in winter, 6.6% in spring, 5.6% in summer, and 6.6% in autumn. More importantly, optimized scheduling used 57.55% less electricity for mining on average across the year.

The coordinated approach wins over always-on mining because while the latter recovers more total heat simply because the machines run more hours, that heat is worth relatively little compared to the extra grid electricity and cooling-system strain it creates, especially in summer when air conditioning demand is already putting so much pressure on the system. 

In contrast, a smart controller only fires up the miners when the combination of mining revenue, electricity price, and the value of the heat they would produce actually justifies doing so. That is the reason the largest savings are seen in summer, when uncontrolled mining is most wasteful.  The researchers noted:

“The largest economic benefits are obtained in summer, where electrical stress is highest due to cooling demand, while consistent improvements are also observed in winter, spring, and autumn.” 

Savings in winter were the smallest but still positive at 4.4%, because heating demand there absorbs recovered heat productively regardless of when it arrives. This shows that profitability doesn’t require continuous operation; rather, it’s more beneficial to activate mining equipment only during economically and thermally favorable periods.

“Waste heat recovery alone does not guarantee optimal system performance,” stated the study. “Although the always-on mining scenario provides continuous heat recovery, it also increases electricity consumption and grid dependency. In contrast, the coordinated scheduling strategy successfully balances mining revenue, renewable energy availability, electricity tariffs, and thermal demand, resulting in superior system-level performance.”

The paper also performed a sensitivity analysis that reinforces the benefit of intelligent scheduling. The researchers further evaluated how external variables influence system performance, examining changes in Bitcoin prices, mining difficulty, electricity tariffs, natural gas prices, heat recovery efficiency, ambient temperature, and installed mining capacity.

Results show that while mining profitability naturally varied with market conditions, the optimized heat-recovery strategy consistently maintained the strongest economic performance because its value was derived from both mining revenue and useful thermal energy. The scalability analysis, meanwhile, revealed that more machines aren’t automatically better.

One might be tempted to increase the number of installed miners to improve economics, but what the researchers found is that scaling up only works up to a certain point, around 250 units in their case study. Once past this number, adding more mining devices stops providing benefits because the profitable, thermally useful operating windows were already fully saturated. So, beyond that threshold, additional miners add no value; they simply sit idle.

“The results reveal a saturation effect beyond which additional mining capacity provides negligible economic benefit, emphasizing the importance of optimal sizing alongside operational control,” the paper reads.

While the results are promising, the study has several limitations. For starters, the framework is a simulation-based feasibility analysis and not based on real-world deployment.

Practical implementation is not achievable under existing conditions due to regulatory and operational constraints in Iran, where the research was conducted, so the findings should be taken as a strong theoretical case for the concept.

Also, the authors have assumed forecasts for renewable generation, electricity prices, thermal demand, and crypto market conditions. Network constraints, real-time user behavior, and other stochastic factors are not explicitly modeled either.

Overall, the study reframes cryptocurrency mining from being merely an energy-intensive digital activity into a flexible component of modern building energy systems. Its main contribution is in showing that when mining already occurs, intelligent scheduling and heat recovery can considerably improve building-level energy efficiency, lower operating costs, reduce unnecessary electricity consumption, and increase the productive use of energy that would otherwise be wasted.

By integrating digital infrastructure with smart building technologies, the research offers a practical pathway toward more efficient and resilient multi-energy systems.

For investors, the takeaway extends beyond sustainability. The study suggests that Bitcoin mining economics may increasingly depend on how intelligently operators manage energy, including when miners run, where their electricity comes from, and whether otherwise wasted heat can be put to productive use.

That makes miners already combining renewable power, flexible infrastructure, and heat-reuse initiatives particularly relevant. HIVE Digital Technologies (HIVE ) is one publicly traded company that closely fits this emerging model.

HIVE Digital Technologies

In the world of cryptocurrency mining, HIVE stands out for providing direct public-market exposure to renewable-powered Bitcoin mining and infrastructure while already pursuing heat-reuse applications.

The company reuses waste heat from its data centers in Canada and Sweden by directing it to nearby facilities like factories and greenhouses. HIVE also operates green-energy data centers in Paraguay, powered by cheap hydroelectricity from the Itaipú Dam.

Like many other Bitcoin miners, HIVE has also been venturing into the AI data center segment to counteract declining profitability from rising energy costs and falling BTC rewards.

This has helped HIVE shares rally (RLY ) 10% year-to-date (YTD) and 34% over the past year, trading at $2.82. It has an EPS (TTM) of -0.57 and a P/E (TTM) of -4.96.

HIVE’s positive market performance is also driven by strong financial results in FY2026. The company reported total revenue of $297.8 million for the full year ended March 31, 2026.

This includes $19.5 million from high-performance computing (HPC) hosting services.

Record revenue from HIVE’s BUZZ HPC business saw a 94% increase from $10 million in FY2025, driven by strong demand on the GPU marketplace and the deployment of the NVIDIA (NVDA ) H200 GPU cluster, establishing “HIVE as an emerging leader in Canadian AI infrastructure.”

Co-founder and Executive Chairman Frank Holmes called this “a defining year for HIVE” for being “one of the first publicly traded Bitcoin miners to invest in GPU cloud computing and AI infrastructure.”

The company has been “building a diversified dual-engine growth strategy” for years, and this year, he noted, “we significantly expanded both sides of our platform, increasing our Bitcoin mining hashrate from 6.5 EH/s to 25.1 EH/s and growing contracted HPC ARR to $35 million.”

With its planned 320 MW AI Gigafactory in the Greater Toronto Area, HIVE now has a clear pathway to $660 million of ARR by end of 2028. As a result of having “the largest planned Canadian AI infrastructure project under private ownership,” Holmes believes the company is “well positioned to capitalize on the growing demand for AI infrastructure.”

When it comes to digital currency mining, the segment recorded $278.3 million in revenue, up 164% YoY, as a result of a fourfold increase in HIVE’s installed operational hashrate and a higher average BTC price, up from $75,881 in FY2025 to $98,040 in FY2026.

During this period, HIVE mined a total of 2,885 BTC, more than double what it mined in the previous financial year.

This 104% increase in Bitcoin production outpaced the 42% increase in average network difficulty, which jumped to 135.8T in FY2026 from 95.7T in FY2025. As of March 31, 2026, HIVE reported 25.1 EH/s in total installed hashrate, or approximately 24.5 EH/s after accounting for controlled downclocking for fleet optimization.

For fiscal year 2026, HIVE reported adjusted EBITDA of $72.9 million, or 24% of total revenue, and a GAAP net loss of $148.4 million.

The company’s gross operating margins came in at $107.9 million, a 14 percentage-point expansion driven by operating leverage on its 300 MW Paraguay expansion and HPC gross margin expansion.

“Our Paraguay expansion transformed HIVE into one of the world’s largest operators of green-energy-powered Bitcoin mining infrastructure,” said Holmes.

At the same time, expenses increased as HIVE added staff to support its global expansion in crypto mining and the growth of its HPC business.

At the end of March 31, 2026, the company held $10.8 million in total digital currency holdings, including 150 BTC, which is far less than what other Bitcoin miners hold. These modest holdings put HIVE at 96th place on the publicly traded Bitcoin treasury companies list.

For Q4 FY2026 specifically, HIVE reported $71.8 million in total revenue, including $67.2 million from Bitcoin mining, which dropped 23.9%, due in part to a decline in BTC price and in part to an increase in average network difficulty, though it was partially offset by higher average operational hashrate following the completion of Paraguay Phase 3.

Meanwhile, HPC revenue was $4.6 million, slightly below Q3 FY2026 but up 54% YoY from $3 million in Q4 FY2025.

“Looking ahead, HIVE sits at the intersection of two powerful technology trends: Bitcoin and AI. Our mandate remains unchanged: disciplined, high-ROIC growth powered by 100% green energy. We believe the investments we have made over the past several years position HIVE for one of the most significant growth periods in our history.”

– Holmes

Conclusion

Cryptocurrency mining may be an energy-intensive process to secure a crypto network, but it offers a compelling opportunity to support building efficiency and sustainability.

As the study has shown, Bitcoin miners shouldn’t be seen as simply high-power computing devices but as flexible electrical loads and valuable sources of recoverable thermal energy. By pairing them with building energy management, operators can improve economic performance, enhance operational flexibility, and promote more efficient utilization of local energy resources. This transforms crypto mining from an energy problem into an important piece of the energy solution.

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References

1. Motlagh, A. G., Renani, M. A., Hajiaghapour-Moghimi, M., Vakilian, M. & Setayesh Nazar, M. Optimization of building thermal and electrical energy consumption through heat recovery from cryptocurrency miners. Next Energy, 100771 (2026). https://doi.org/10.1016/j.nxener.2026.100771