Renewaire – Why do I need an ERV?

Nothing is more important than the health of family and home

• Today’s homes are airtight.
• The need for ventilation has never been more important.
• RenewAire is uniquely qualified to provide this critical indoor component.

RenewAire’s advanced ventilation products are based upon a simple principal – bring equal amounts of healther, fresh air into your home while exhausting the same amount out, and do this in the best energy-efficient manner as possible. Unlike ordinary residential ventilation systems, RenewAire handles both exhaust and fresh airstreams while also moderating humidity and temperature extremes during summer as well as winter. This results in the very efficient delivery of fresh air while exhausting unhealthy stale air, including odors, excess carbon dioxide, formaldehyde, and other harmful gaseous pollutants, regardless of the time of year or where you live.

Renewaire has a complete lineup of ERV’s suitable for every house, condo or loft.  It provides the most cost efficient way to ventilate your home to keep the contaminant levels inside the house to the minimum.  So how do we determine the amount of air that we need to ventilate in a home?  ASHRAE has created a standard for us to follow.  Below is a brief summary of the ASHRAE 62-2003 standard

The first thing people tend to took at in a ventilation standard are the rates, specifically the whole-house ventilation rates.  From 1989 the whole-house rate in 62-2001 is set at 0.35 air changes per hour, but no less than 15 cfm/person (7.5 l/s/person).  The default number of people was assumed to be two for the first bedroom plus one for every additional bedroom.  In 62.2-2003 the committee decided to make the target ventilation rate comprise a sum of the ventilation necessary to dilute background sources and sources attributable to occupancy.  To find the total amount of outside air needed one needs to add 3 cfm/100 sq. ft. (15 l/s/100 sq. m.) to the 7.5 cfm/person (3.5
l/s/person).  Thus the air change rate requirement will vary by the size of the house and the occupancy.

You can follow the rule of thumb below:

Renewaire Residential ERV Models

MODEL                        RESIDENCE SIZE                    AIRFLOW (MIN-MAX)
BR70                            up to 1500 sqft                          40-70 CFM
EV90, GR90, EV90P    up to 2000 sqft                          40-110 CFM
EV130, BR130             up to 2700 sqft                           50-140 CFM
EV200                          up to 4000 sqft                           100-200 CFM
EV300                          up to 6000 sqft                           150-300 CFM