Needs a check
One room is cooling quickly.
17°F drop in 2½ hours
In this simulation, the room cools from 62°F to 45°F over 2½ hours.
Outside: 14°F. Nearby rooms remain warm.
Next stepCheck Room 204’s windows and heating.
Terrestream for Facilities
Know which rooms need attention.
Even when campus is empty. Holiday closures. Sudden cold snaps. An open window in an empty room. Bring room conditions and outdoor weather into one prioritized campus view, so your team knows where to go and what to check first.
HECVAT & accessibility documentation availableLower operating costs. Lower institutional risk.
Aerodyne Inc. has worked with more than 50 universities across the United States. Aerodyne reports the following results from one heating season on a Midwestern campus that stayed mostly empty over the holidays.
21%lower HVAC and maintenance costs
Year over year, reported by Aerodyne as measured by the university.
15fewer walkthroughs a month
Rooms checked from the dashboard instead of on foot.
35sensors
Five buildings. One heating season. No hubs or gateways to install.
One nightover winter break
With campus nearly empty, staff reached a room as its temperature approached freezing.
These owner-reported results describe one campus and one heating season in Aerodyne’s facilities work. A detailed baseline and measurement method are not published here; the figures have not been independently verified and do not establish savings for a new Terrestream installation. Savings and outcomes vary; similar results and loss prevention are not guaranteed.
Start with one building
Five rooms. A clearer picture.
Put coverage where your team needs it most. Five sensors, yours to keep, with 12 months of monitoring included.
$1,000Standalone pilot purchase
The checks that matter
From room conditions
to a maintenance priority.
Choose a concern to see the signal, the rooms it can affect and the first check to make.
What you see
Room temperature is falling while outdoor conditions are below freezing.
First check
Check heat delivery and exposed plumbing in the affected room.
Explore the campus connections
Buildings connect to monitored rooms and the inspection priorities described below.
The six priorities your team would investigate
Freeze risk
Room temperature is falling while outdoor conditions are below freezing.
First check. Check heat delivery and exposed plumbing in the affected room.
Open window suspected
One room cools rapidly toward outdoor temperature while nearby rooms stay stable.
First check. Inspect windows, exterior doors and drafts; confirm the cause on site.
HVAC fault suspected
Rooms served by the same system fail to maintain their expected temperature range.
First check. Check the thermostat, local equipment and heating or cooling delivery.
Excess heating or cooling
Room conditions suggest unnecessary conditioning during scheduled unoccupied hours.
First check. Review operating schedules and temperature setbacks against actual room use.
Dampness & mold risk
Persistent high humidity or condensation risk calls for a moisture check.
First check. Inspect for damp surfaces and moisture sources; review ventilation and dehumidification.
Ventilation shortfall
COâ‚‚ remains elevated during occupied periods.
First check. Review occupancy and outdoor-air delivery; check the ventilation system.
- Residence hall
- Room 218 → Freeze risk, Open window suspected
- Room 312 → Freeze risk, HVAC fault suspected
- Science building
- Lab 106 → HVAC fault suspected, Excess heating or cooling
- Seminar 214 → Ventilation shortfall
- Library
- Archives → Dampness & mold risk
- Study room → Ventilation shortfall
- Administration
- Office 204 → Excess heating or cooling, Open window suspected
- Lower-level storage → Dampness & mold risk
Simple to place. Useful all year.
Start in the rooms
you worry about most.
Temperature and humidity reveal changing conditions. COâ‚‚, particulate matter and gas indexes help your team investigate ventilation and air quality long after heating season ends.
- 01Power and connect.
Plug into continuous USB-C power and join approved campus Wi-Fi with the Terrestream app.
- 02Give every sensor a place.
Choose its building and room. Prepare locations in the dashboard or add them as you install.
- 03Confirm readings. Start reviewing.
Your team shares one campus workspace, with room history and a record of checks and recovery.
Measurements & network requirements
- Room measurements
- Temperature, relative humidity, COâ‚‚, PM1, PM2.5, PM4, PM10, VOC and NOx indexes, barometric pressure and ambient light.
- Sensor components
- Sensirion SEN66 · Bosch BMP390L · TI OPT3001.
- Campus network
- Approved 2.4 GHz Wi-Fi; WPA2-Personal recommended. Ask IT for an IoT network without a captive portal. The app does not provision enterprise 802.1X credentials or certificates. Full power and network requirements are in the IT sheet.
Your campus, in numbers
See the investment.
Explore the return.
$249 each · $199 at 11+
Use the budget for the areas you plan to cover.
Enter your own estimate to see a modeled return.
First 12 months of monitoring included. Then $49 per monitored sensor per year, billed annually.
Adjust installation, maintenance & risk assumptions
Three-year view · USD
- Sensor hardware
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- Installation budget
- $0
- Monitoring · year 1
- Included
- Monitoring · each of years 2 and 3
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- Total modeled investment
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- Modeled operating benefit · 3 years
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- Modeled net · 3 years
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Costs, assumptions and cash break-even in one PDF.Save PDF
Compare savings scenarios & view the cash-flow chart
Explore potential HVAC savings.
Compare the return using the same campus costs. Select a scenario or enter your own percentage above.
- Operating benefit / year
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- First break-even
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- Net benefit / 3 years
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- Operating benefit / year
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- First break-even
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- Net benefit / 3 years
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- Operating benefit / year
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- First break-even
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- Net benefit / 3 years
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Illustrative outcomes depend on the changes your team makes in response to findings.
Watch the costs and benefits meet.
Operating benefitInvestment + fees
Published industry examples
Results from other providers show what identifying waste and acting on it can achieve. They describe individual projects and operational changes.
- 26% less energy in one year. Airthings reports that Toma identified unnecessary weekend heating and corrected it. Read the Airthings case study
- 20% lower energy costs. Airthings reports that Proptech Bergen reduced nighttime and weekend temperatures, using sensors with existing building infrastructure. The project also avoided approximately €18,000 in HVAC specialist visits. Read the Airthings case study
Compliance & procurement
Ready for your
institution’s review.
Scope your rooms. Get IT sign-off. Submit a purchase order or request NET 30 invoice review.
Higher education documentation
Completed HECVAT 4.1.6 and an Accessibility Conformance Report prepared using VPAT® are available on request.
Request compliance documentsAccessibility statementDocumented security controls
Our documentation maps information security controls to ISO/IEC 27001 and 27002 and SOC 2 control themes, and selected device capabilities to NISTIR 8259A, ETSI EN 303 645 and NIST CSF 2.0. These are documented alignments, not third-party certifications.
For facilities, IT, and procurement
Clear answers.
A confident start.
Does it know that a window is open?
It measures room conditions. Cooling patterns and outdoor conditions can suggest heat loss; a person checks the window, heating, and other possible causes.
Does this replace our inspection program?
No. Monitoring helps prioritize checks. Required inspections, heat protection, maintenance, and insurer requirements remain part of your program.
What if a sensor goes offline?
The room view shows missing or stale readings as unknown. Use a fallback check when reliable readings are unavailable.
Are email and text alerts available?
Yes. Alerts are sent to a verified primary contact by email and text message. If no one acknowledges an urgent alert, a backup contact gets it after the delay you set. Alerts go out only during the coverage hours your team chooses, around the clock or on a weekly schedule; an alert raised outside those hours waits until coverage starts. Administrators can see delivery status, and each incident records who acknowledged it.
Can our team use the data elsewhere?
The Facilities workspace exports incidents and their activity log as CSV files. Optional local HTTP and MQTT access support your own network integrations. Discuss hosted API access and any building-management integration requirements when scoping your order.
Start with one building
Put your priority rooms in view.
Tell us about your buildings, rooms, and what your team wants to learn.