Exergy

The following resources are free for anyone considering building-integrated mining:

• Online calculators to estimate savings and size a system (calc.exergyheat.com)
• Open-source smart home integrations and documentation (docs.exergyheat.com)
• Weekly office hours on Wednesdays at 10am Mountain Time
• Community support forum
• A free 15-minute intro call to discuss your situation

These tools let you explore the economics and technical approach before committing to paid services.

Tier 1 – Self-Serve (DIY)

Designed for owners who want to build and run their own system:

• Use the free calculators to check building fit and size your system
• Review Exergy's open-source Home Assistant integrations and docs
• Install and configure your own hardware and controls
• Get help via the forum, documentation and weekly office hours

This path is best for technically comfortable customers who want maximum control and are willing to do their own integration work.

Tier 2 – Guided (remote consulting)

For customers who want expert design and remote guidance while using their own local trades:

• Exergy Audit to quantify economics, system size and expected savings/earnings
• Full integration design – system sizing, control strategy, Home Assistant configuration and an install playbook
• Hardware sourcing – Exergy recommends and supplies vetted hardware and ships it to you
• Remote coordination – Exergy works alongside your HVAC, plumbing and electrical contractors to answer questions and refine the setup during install and commissioning

Guided services and Exergy Audit are available anywhere in the United States via remote delivery.

Tier 3 – Done-For-You (full installation)

For customers who want Exergy to handle the entire project end to end:

• Detailed audit and system design
• Hardware selection and procurement
• Coordination of all required trades (mechanical, plumbing, electrical, networking and controls)
• On-site installation, commissioning and handover of a working system

Done-For-You installation is available locally to Denver, Colorado, typically within roughly a 100-mile radius.

Commercial and project-based work

For commercial buildings and new construction projects, Exergy typically joins the existing project team as the building-integrated mining specialist:

• Works alongside architects, MEP engineers and general contractors
• Handles mining system sizing, economic modeling and integration design
• Coordinates with project trades for the mining and controls scope

Exergy Relay as an add-on

Exergy Relay is an optional remote monitoring and support service that can be added to systems built through any tier. Details on what it includes and how pricing works are covered in the separate pricing and Exergy Relay document.

The following resources are free of charge:

• Online calculators for sizing systems and estimating economics (calc.exergyheat.com)
• Open-source Home Assistant integrations and technical documentation (docs.exergyheat.com)
• Weekly office hours on Wednesdays at 10am Mountain Time
• Community support forum
• A 15-minute introductory call

Exergy Audit fees

Exergy offers a detailed thermo-economic audit of your home or building. As described on the site:

• Residential Exergy Audit: $500 (USD)
• Commercial Exergy Audit: $2,500 (USD)
• The audit fee is credited toward hardware if you proceed with a system based on Exergy's recommendations.

The audit typically includes:

• A monthly-resolution model of your building's heat load using heating degree days
• Modeling of Bitcoin mining economics under current network conditions
• Recommended system sizing and expected Bitcoin earnings
• Estimated savings compared to your current heating setup
• ROI projections based on your actual energy costs and usage

System, hardware and installation pricing

System design, hardware packages and installation work are quoted individually. Important points:

• Exergy tests and validates third-party mining hardware but does not publish a public hardware catalog or fixed prices.
• Hardware models, availability and pricing change frequently.
• Installation scope and cost vary significantly by building, integration type and local contractor rates.

Because of this variability, Exergy does not state fixed prices for complete systems or installations on the website. Customers should contact Exergy directly to receive a current quote tailored to their building and integration plan. The agent must not estimate or infer hardware, installation or package pricing beyond what is explicitly published here.

Exergy Relay pricing and terms

Exergy Relay is an optional remote monitoring and support service available to customers in any service tier.

What Exergy Relay includes, as described on the site:

• Customer portal at exergy.me that links to your Home Assistant instance, support forum and documentation
• Secure remote access to your Home Assistant dashboard via a custom exergy.me subdomain
• Real-time performance monitoring of your system
• Automated alerts for hashrate drops, temperature anomalies and connectivity issues
• Monthly mining performance report (output, value earned and net heating cost)
• Priority support and remote intervention when needed

How Exergy Relay is charged:

• No subscription, invoice or credit card billing
• Cost is a 5% hashrate split – 5% of your mining rewards go to Exergy; the remaining 95% go directly to your wallet
• Example from the site: if your miner earns $200/month in Bitcoin, Relay costs you $10/month via the 5% share
• You can disable Relay at any time; the system continues heating and mining normally, but you lose the remote visibility and reporting.

Important notes for pricing questions

• Only the Exergy Audit fees and the Exergy Relay 5% hashrate split are published as specific prices.
• All other pricing (hardware, installation labor, bundled systems, CTRL1 standalone hardware, and similar items) is determined by quote.
• For any question about exact current pricing or availability, customers should be directed to contact Exergy directly rather than relying on estimates.

• Email: contact@exergyheat.com
• Mailing / office address: 3700 N Franklin St, Denver, CO 80205, United States

Calls and meetings

• Exergy offers free 15-minute introductory calls that can be booked via the calendar link on their website.
• Longer calls or project discussions are typically scheduled after an initial qualification call or as part of an Exergy Audit or consulting engagement.

Office hours and response times

• Exergy hosts weekly office hours on Wednesdays at 10:00 am Mountain Time.
• Office hours are free and open to anyone who wants to ask questions about building-integrated mining, Home Assistant integrations or specific projects.
• The website notes that Exergy aims to respond to emails within one business day.

Service areas

• Exergy's remote services (including Exergy Audit and Guided consulting) are available anywhere in the United States.
• Done-For-You installation is offered locally around Denver, Colorado, typically within roughly a 100-mile radius of the city.

For any question that requires a quote, a custom design or confirmation of current availability, customers should be directed to contact Exergy directly using the email address or contact options above.

Colorado Mountain Home

• Location: Colorado mountain region (residential home)
• Size: 2,396 sq ft
• Configuration:
• A single water-cooled miner installed in the existing mechanical room
• Hot water from the miner circulates to a radiator inside the furnace return duct
• The existing air handler distributes warm air through the ductwork
• Results reported on the site:
• Heat share: 98.6% of the home's heat demand over a full heating season came from the miner
• The gas furnace ran for about 4.4 hours total across 43 days
• The miner effectively acted as the primary furnace
• Payback period stated as less than 2 years

All-Electric Mountain Home

• Location: mountain-region home using electric resistance heat
• Size: 3,966 sq ft
• Configuration:
• Two miners in an immersion tank
• Miners replace a 40 kW electric boiler as the primary heat source for radiant floors
• No new thermostats, wiring or contractors beyond a plumber were required
• Results reported on the site:
• Effective heating cost reduction: 45% lower than straight electric resistance heating
• Payback period stated as approximately 18 months

Solar Home

• Size: 900 sq ft
• Starting point:
• Existing furnace was failing and quoted at $10,000 for replacement
• The home's solar system exported excess energy to the grid for about $0.01 per kWh
• Configuration:
• A building-integrated mining system installed for about $4,000 (installed cost)
• Results reported on the site:
• Furnace replacement was deferred indefinitely
• Excess solar routed through the miner earned 3.3× more value than exporting to the grid at the published net-metering rate
• Payback period stated as less than 1 year

Commercial / mixed-use case study

Commercial Building (Exergy demo site and office)

• Type: commercial building and Exergy's Denver demo site
• Size: 5,250 sq ft
• Configuration highlights:
• Five miners across four zones
• Liquid-cooled "Bitcoin boiler" serving radiant floors
• Bitcoin-heated hot tub
• Solar-to-mining arbitrage for excess solar generation
• Home Assistant–based control system that evaluates the cost of every available energy input in real time
• Results reported on the site:
• Building gas usage described as nearly eliminated
• Bitcoin earnings are ongoing rather than summarized as a simple payback figure

How to use these examples

• These case studies are examples, not guarantees.
• They show configurations that have been built and measured by Exergy in specific buildings with specific energy prices.
• Actual economics and performance depend on your own building, fuel and electricity costs, solar configuration and Bitcoin network conditions.

Prospective customers should use Exergy's calculators and/or an Exergy Audit to get building-specific projections rather than assuming these example paybacks will apply directly to their situation.

Based on Exergy's descriptions and case studies, strong candidates often include:

• Buildings heated with propane or heating oil – especially where fuel costs are high
• Buildings with expensive electric resistance heat
• Homes and buildings with solar and low net-metering rates (for example, around $0.01 per kWh)
• Properties with sustained heat loads, such as:
• Pools and hot tubs
• Radiant floor heating
• Large or continuously occupied spaces

In these situations, building-integrated mining can significantly reduce effective heating cost and/or increase the value of excess solar generation.

Weaker-fit situations

Exergy identifies some cases where the economics may be less compelling:

• Cheap natural gas combined with relatively higher electricity prices
• Heat pumps in mild climates where electricity is already used efficiently for heating
• Buildings that rarely need heat, so there is little heating load to displace

In these scenarios, Exergy systems can still function, but they are more often framed as a way to accumulate Bitcoin while heating rather than primarily as a cost-saving measure.

Typical paths to get started

Exergy suggests several ways to begin exploring whether a system is right for you:

1. Run the calculator

• Use the free online calculator at calc.exergyheat.com
• Enter your heating fuel, electricity rate, solar details and building characteristics
• See estimated economics, system sizing and payback based on your actual inputs

2. Join weekly office hours

• Free, open office hours each Wednesday at 10am Mountain Time
• Held online; intended for Q&A about Home Assistant integrations, system design and fit

3. Book a free 15-minute intro call

• Short consultation to understand your situation and recommend a service tier (Self-Serve, Guided or Done-For-You)

4. Request an Exergy Audit

• Detailed thermo-economic model of your building and system design recommendations
• Offered for both residential and commercial properties (see pricing document for current audit fees)

5. Contact Exergy directly

• Email and contact details are listed in the contact document
• Suitable when you already know your project scope or have specific technical questions

How Exergy frames outcomes

Exergy emphasizes that:

• A miner does not need to be industrially "profitable" to be worthwhile; it needs to be useful by lowering effective heating cost, capturing excess solar or stacking Bitcoin on the margin.
• Every joule of electricity used by a miner becomes heat; in many buildings that heat is required anyway.
• For some customers, especially on expensive fuels, the net monthly economics can be strongly positive before even counting Bitcoin price changes.

Exact savings and payback are building-specific and modeled through the calculator and Exergy Audit rather than stated as universal figures.

The CTRL1 Hub is Exergy's purpose-built Home Assistant control hub:

• Raspberry Pi 5–based controller with NVMe SSD storage
• Zigbee antenna and support for common smart home protocols (including Zigbee and Z-Wave)
• Aluminum case with a front display that shows the local network address
• Ships pre-loaded with Exergy's open-source Home Assistant integrations
• Designed to connect your Bitcoin miner, thermostat, solar inverter and other devices
• Runs locally on your network with no cloud dependency or subscription

The CTRL1 Hub is currently included with Tier 2 (Guided) and Tier 3 (Done-For-You) service installs. Standalone purchase is planned for the future but is not yet generally available.

Open-source smart home integrations

Exergy maintains open-source Home Assistant integrations that make a Bitcoin miner behave like a smart, thermostat-aware device rather than a standalone appliance.

Key characteristics:

• Available free via the Home Assistant Community Store (HACS)
• Runs entirely on your local Home Assistant instance
• Reads heat demand and adjusts miner output automatically
• Responds to solar generation in real time
• Switches operating modes based on rules you configure
• Does not require the CTRL1 Hub for DIY installs when you provide your own Home Assistant hardware

Supported platforms and related tools include (as published on the site):

• Braiins OS
• LuxOS
• Whatsminer
• BitAxe
• Ocean Pool
• Public Pool
• DATUM
• Bitcoin economics data sources

Integration types Exergy supports

Exergy designs systems around five primary integration patterns, so they can adapt to the way your building already distributes heat:

1. Smart zone heaters – standalone miners used as space heaters for individual rooms, garages, workshops or cabins.
2. In-duct / forced air – miners installed in the HVAC return duct, with the existing air handler distributing warm air through the building.
3. Hydronic / radiant – miners heating a water loop that feeds radiant floors, baseboard radiators or fan-coil units.
4. Water, pool and spa – miners dedicated to heating pools, hot tubs, domestic hot water or tank-style water heaters.
5. Excess solar – miners used as a dispatchable electrical load that ramps up when solar production exceeds building usage and backs off when demand rises.

Every building is different; Exergy chooses the integration type that fits the existing HVAC and water-heating infrastructure.

Third-party mining hardware

Exergy does not manufacture ASIC miners themselves. Instead, they:

• Research available mining hardware on the market
• Buy and test specific models
• Validate performance across all five integration types
• Check thermal behavior, firmware compatibility with Home Assistant, noise levels and physical fit for the intended application

Examples of applications include space heating, in-duct heating, hydronic and radiant systems, pool and spa heating, and excess-solar load absorption.

Hardware models, availability and pricing change frequently, so Exergy does not publish a fixed catalog or price list. Customers are asked to contact Exergy directly for current recommendations and pricing for their specific integration type and building.

• Uses Bitcoin miners as part of a building's primary heating infrastructure, not just as side-project hardware.
• Every watt of electrical power going into a miner becomes heat at the point of use (100% conversion), similar to any electric heater.
• The difference vs. conventional electric heat is that miners also earn Bitcoin for the same electricity, so each joule of energy becomes heat plus Bitcoin.

Exergy focuses specifically on Bitcoin because it is the only proof-of-work network large and stable enough for this kind of heating use case.

Relationship to your existing heating system

• Miners are typically integrated as stage 1 heat, with your existing furnace or boiler acting as stage 2 backup.
• A miner is usually sized for the average heat load, not the absolute coldest day.
• On very cold days, the backup system picks up the difference (the "buddy system").
• Control logic is handled by Home Assistant, which decides when to run the miner, when to call for backup heat and when to shut systems off.

In real-world installs cited on the site, backup systems fire relatively rarely because the miner covers most of the heating season.

Noise and maintenance

• Liquid-cooled systems (such as boiler-style miners) are described as nearly silent; the miner itself is quiet and only the circulator pump produces sound.
• Air-cooled systems are similar in noise level to a forced-air furnace fan. In-duct installations place the miner in a mechanical room so living spaces remain quiet.
• Maintenance points include:
• Periodic cleaning or replacement of air filters on air-cooled units
• Occasional firmware updates
• General visual checks for dust, airflow and coolant where applicable

Exergy notes that miners have fewer moving parts than gas furnaces and that Exergy Relay monitoring can alert owners to issues before they notice them.

Home Assistant and the CTRL1 Hub

• Home Assistant is open-source, local smart home software used as the control layer in Exergy systems.
• It reads thermostat calls, solar generation data, miner performance and pricing inputs, and makes real-time decisions about how the system should operate.
• For Self-Serve customers, you set up and manage Home Assistant yourself.
• For Guided and Done-For-You customers, Exergy designs and configures the Home Assistant setup for you.

The CTRL1 Hub is Exergy's pre-configured Home Assistant device that simplifies this setup by bundling the necessary hardware and integrations.

Operating modes

Exergy describes four main operating modes for systems built on their integrations:

1. Mine to Heat – miners run whenever heat is called, maximizing Bitcoin accumulation for required heating.
2. Cheapest BTU – Home Assistant selects the lowest-cost heat source in real time (for example, comparing gas, standard electric and miner-powered heat).
3. Solar First – miners prioritize absorbing excess solar production before drawing power from the grid.
4. Always On – miners run continuously, treating heat as a byproduct; suitable for customers focused on maximum hashrate uptime.

Most real systems use a mix of these modes depending on season, time of day and electricity pricing.

Solar integration

• Exergy systems can integrate with rooftop or ground-mounted solar.
• When panels produce more power than the building uses, excess power is often exported to the grid at relatively low net-metering rates.
• Exergy's case studies include an example where routing surplus solar through a miner produced 3.3× more value than grid export at a $0.01/kWh net metering rate.
• Miners can be controlled to match surplus solar output, so they absorb exactly the excess power rather than importing additional grid power when undesired.

Environmental framing

• Building-integrated mining typically replaces or reduces fossil fuel heating (such as propane or fuel oil) with electric heat that also earns revenue.
• Every joule of energy used by a miner becomes useful heat, and the Bitcoin it earns helps offset the electric cost.
• For solar owners, miners convert otherwise under-valued or curtailed solar energy directly into Bitcoin.

Exact environmental impact and economics depend on the building's current fuel mix, grid intensity, solar configuration and local rates.

Ask anyway — the agent will say plainly that it is not published rather than guess.