Sexually transmitted diseases -- or STDs -- often are silent, meaning there are no symptoms. Women may not notice any symptoms until they have developed serious complications. Be on the lookout for: A drip or discharge from the penis, urethra, vagina, or anus; the color may be white, yellow, green, or gray.
An energy recovery ventilator (also abbreviated ERV) is a type of air-to-air heat exchanger that not only transfers sensible heat but also latent heat.Because both temperature and moisture are transferred, ERVs can be considered total enthalpic devices.he benefit of using energy recovery is the ability to meet the ASHRAE ventilation & energy standards, while improving indoor air quality and reducing total HVAC equipment capacity.
An HRV or ERV has two fans, one to exhaust stale air from the house, one to supply fresh air into the house, and a heat exchanger to transfer heat or energy from one airstream into the other.Depending on the unit selected there will be a choice of controls to operate the unit in properly.During the heating seasons, heat is transferred from the warm indoor exhaust air into the cold outdoor supply air inside the HRV heat exchanger.epending on the unit selected there will be a choice of controls to operate the unit in properly. During the heating seasons, heat is transferred from the warm indoor exhaust air into the cold outdoor supply air inside the HRV heat exchanger.