Caring for a certified zero energy home is a snap. The care taken to design and build a durable, high performance residence pays off in easy operation and less maintenance, repair, and service.
Although not necessary to achieving the goal of net zero energy use, many zero energy homes are smaller than average, meaning there is less area to clean. Air-tight construction and the fresh, filtered air from the ventilation system result in less dust. To the extent that the home design has followed suggestions to limit window area to reduce heat loss while locating them for optimal light and ventilation, there will also be fewer windows to clean. An induction cooktop, common in zero energy homes, has a glass top that never gets very hot, so the inevitable spills are easy to wipe up.
Mini-split heat pumps, which are commonly used in zero energy homes, should be set to one temperature during the heating season and another for the cooling season. Other than that, there isn’t much need to tinker with the thermostat. One setting keeps the temperature very stable. Automatic ventilation systems (HRVs or ERVs), once set, run continuously without any adjusting, other than the option to boost airflow when needed. Solar PV panels need no homeowner operation.
Because of careful design and construction, there is less opportunity for mold and water damage in a zero energy home, which can be a major cause of damage to standard homes. The heating, cooling and ventilation systems are very reliable and seldom need regular professional HVAC service or repair, other than what would be expected with any state of the art mechanical systems. Even the solar PV collectors need no servicing and rarely need repair. High performance systems mean just that. They perform at a high level and require very little upkeep.
Mini-splits: Air-based mini-split heat pumps have filters that do need to be cleaned regularly, just as would any air filter. Most mini-splits have two filters in the indoor unit that should be cleaned every few months. Check the owner’s manual for details. The outdoor unit has heat exchange coils that can be hosed down, if debris accumulates on the coils, taking care not to bend the aluminum fins. Inspect the tubes and wires once a year. If there is any sign of leakage or wear, call a professional for service.
Ventilation: For HRV or ERV ventilation systems the pre-filter should be cleaned every 3 to 4 months and the internal filter once every 6 months. Most ventilation systems recommend that the internal filters be changed every couple of years. External vents should be checked once a year to be sure no leaves or debris are blocking them.
Solar Collectors: If there is an extended period without rain, it’s a good idea to check your solar collectors, as the solar panels may accumulate an excessive amount of dust. If that is the case, the panels can simply be hosed down in the morning or evening when the panels are cool. Never spray water on hot panels, because thermal shock can break the glass. When you are in the garage, notice if the lights on the solar inverter are blinking. If they are, check your manual and call the solar installer if needed.
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