Every house needs some air to circulate to allow for particulates to filter and more importantly the residents able to breathe fresh air. This is referred to as the Minimum Ventilation Rate (MVR) of a house. It is calculated by using several house characteristics, such as square footage and the number of levels, to provide a number that the PosiGen Energy Efficiency Upgrade crew can’t go below. Doing so has the potential to cause latent health and safety issues. While the most important work that is performed is air sealing the house, there are cases where the house is already too tight (or close to it) and alternative energy efficiency upgrades are recommended.
In certain cases the upgrade crew will decide it better to cancel the energy efficiency portion of the contract. If the crew thinks the homeowner will not see a net benefit they will recommend cancelling. This is to say that the improvements would not save more than the homeowner pays each month for energy efficiency. PosiGen aims to provide the best value to its customers, and if a house is in good shape, there is no reason to have a homeowner pay for savings that will not be seen.
There are still options for homeowners to save some money on their bills. Lightbulbs, smart power strips and a properly used programmable thermostat each provide some savings, but together can add up to a few dollars per month. In addition, knowing where the energy is being used in the house is critical. Remembering to turn off the lights when leaving a room or turning down the thermostat when no one is around can add up to even more. With these actions homeowners can see savings without any work performed.
In extreme cases there may require mechanical ventilation. This is a fan assisted outside air source. The air is filtered from outside for debris or pollen and improves the comfort and safety of the inside air.