The easiest way to measure the tightness of houses iswith a diagnostic device called Blower Door🇧🇷 The blower port consists of a powerful calibrated fan temporarily sealed in an external port. The fan blows air out of the house to create a slight pressure difference between inside and outside.... read more ›
This measurement describes how often air is exchanged in a given room. In an energy efficient home, this number should drop below 0.50 ACH. However, building codes suggest thisat least 0.35 ACH, whether the air is brought into the house through fans or is the result of natural air leaks.... see more ›
To answer our original question, can you seal a house too tightly? The answer is:¡No!With the right residential ventilation systems, a hermetically sealed East Coast home offers excellent control over your home's performance, from increased energy efficiency that keeps your energy bills low to improved indoor air quality.... see more ›
Have you ever heard that because a house needs to breathe, you shouldn't seal it too tightly? It's a common myth, but that's what it is: a myth.Houses DO NOT need to breathe.... read more ›
Check exterior weatherstripping around doors and windows and make sure exterior doors and front doors close tightly🇧🇷 Check windows and doors for air leaks. See if you can shake them off, as movement means possible air leaks. If you can see daylight around a door or window, then the door or window has a leak.... see more ›
- Increased static electricity.
- Frequent nosebleeds.
- Dry skin.
- Chapped Lips.
- Dry throat and nose.
When a home is compromised by poor ventilation, residents often experience physical symptoms. You can tellYour nose runs more often or you lie still at night🇧🇷 Watery and itchy eyes; Sore throat; and skin rashes can be caused by insufficient fresh air.... see details ›
A test between 3 and 5 m3h-1m-2 would generally be acceptable to the site inspector and your SAP consultant. A reading of less than 3m3h-1m-2 could mean that the building is too airtight. This can lead to condensation and mold, so it must be accompanied by an adequate ventilation system.... see more ›
About Air Leakage Units
I prefercfm50 per square foot building envelope, or rather cfm50 per hundred square feet of building envelope (sfbe). (One cfm50 is one cubic foot per minute at a pressure difference of 50 pascals between inside and outside.)... read more ›
How to calculate the required fan size. To calculate the required extraction power, multiply the subfloor length x width x height. This will give you the basement area in m3. For underfloor ventilation, we recommend pointingbetween 6 and 10 air changes per hour, but it depends on the severity of the problem.... continue reading ›
The air intake is inside the house (usually a vent coming out of the firebox), so the air is actually coming in from inside the house. You don't have to do this for hours;15 to 20 minutesIt is enough to make a difference.... view details ›