A plain-language guide for residents of the fictional 240-home Harbor Loop neighborhood before installation begins.
What is being installed, and what should residents expect?
The Harbor Loop network moves useful heat from the ground, upgrades it with shared electric heat pumps, and delivers normal heating and hot water while homes keep their radiators and thermostats.
Source: user brief. Harbor Loop, the utility and all numbers are fictional.
Twelve sealed boreholes exchange heat with the ground through water loops 190 metres deep.
Water circulates around Harbor Loop at 9°C to 18°C, carrying low-temperature heat between buildings.
Each building’s central heat pump raises heating water to 52°C for space heating.
The network does not create heat by burning fuel in each home. It collects existing heat and lifts it to a useful temperature.
Same vocabulary we will use throughout: boreholes, shared ambient loop, building heat pump, domestic hot-water booster, smart controls.
190 m deep, sealed water loops exchange heat with the ground.
Water circulates around the neighborhood at 9°C to 18°C.
One central unit in each of six buildings raises heating water to 52°C.
Domestic hot water reaches 60°C, with a weekly 65°C hygiene cycle.
Flexible heating shifts away from the 17:00 to 20:00 grid peak.
No borehole fluid enters household water. The ground loop, heating loop and domestic-water loop are hydraulically separate.
Your exact one-day connection slot is chosen later, after survey access is confirmed.
| Month | Useful heat | Electricity | Average loop temperature | Plain-language reading |
|---|---|---|---|---|
| January | 78 MWh | 25 MWh | 9°C | Highest heating need, coldest loop. |
| April | 42 MWh | 12 MWh | 12°C | Spring demand drops. |
| July | 18 MWh | 5 MWh | 17°C | Mainly hot-water demand. |
| October | 46 MWh | 13 MWh | 13°C | Heating season starts again. |
Source: user brief, representative building model.
More heat is drawn from the loop. January average loop temperature: 9°C.
Demand eases. April and October sit around 12°C to 13°C.
Less space heating. July loop average rises to 17°C.
Seasonal performance factor: 3.5 units of heat delivered per unit of heat-pump electricity.
Source: user brief. Values are modeled for the fictional project.
The service charge is indexed annually, capped at consumer inflation plus 1 percentage point for the first five years.
Source: user brief. Emissions use the fictional project’s stated electricity factor.
You set the thermostat. The building heat pump supplies lower-temperature heating water for longer, steadier runs.
Controls may pre-heat by up to 0.7°C before the evening peak, never above your chosen set point.
Hot water is boosted to 60°C. Modeled nighttime level at the nearest bedroom facade is 24 dBA.
No fluid from boreholes enters household water. Water hygiene is verified before handover.
Backup electric boilers cover the coldest 18 modeled hours a year and provide N+1 resilience during maintenance.
A 24-hour support line responds within 30 minutes and targets restoration within four hours.
Each borehole is pressure-tested twice before service.
Performance and outage data will be published monthly on the resident portal.
Workdays 08:00 to 18:00.
Twelve sealed boreholes installed and tested.
Central heat pumps and boosters installed.
One working day per home.
Network begins full service.
Allow the project team to check the home connection requirements.
Pick the one-day home connection appointment when offered.
Keep space around radiators clear before the connection day.