1624 HOYT AVE B 2024-08-02 - Laserfiche WebLink

From The Ground Up Home Inspections Robayo 1. Building Enclosure Performance This section contains the testing results of conducting a Blower Door Test.This test measures how much air is leaking in or out of your home by the hour"Air Changes per Hour or ACH", and helps locate the area or areas where these thermal breaks occur. It also determines how much air your home needs (Minimum Ventilation Requirements MVR ASHRAE 62.2) based on the volume, occupants and number of bedrooms.The remaining air beyond the MVR are leaks. For every cubic foot of conditioned ($) air that leaks out of your home, another cubic foot of air(unconditioned) must come in. Positive and negative pressures in the home either natural, or created can be from wind driven air leaks, door locations, home design, fans and duct design. By sealing air leaks and even pressures between rooms, home owners can not only visibly reduce their power bill, but can add comfort. Comfort can also be improved in the home by air sealing and steps to even room pressures that can eliminate hot and cold spots or wide swings in room temperature. Homes with duct piping can cause positive or negative pressure in a room either through leaks in the duct system or the design of duct system such as a lack of return air in each room. Leaky ducts in unconditioned space like a basement or crawlspace can bring in moisture, odor and unhealthy air.A leaky return air in the attic can bring in 110 degree temperature or more into the cooled conditioned air which now has to be cooled (or vice versa for heat) all the while wasting energy and causing discomfort.The air handler(that blows the cool or heated air into the home through the ducts) requires the exact amount of air that it supplies, to return to it. If the supply duct is leaking,the return air will pull the air it needs from the Building Enclosure(through light fixtures, cracks, cavities, cut-outs in ceiling walls and floors, and this air is not conditioned or clean as it brings in dust particles from attic and wall cavities along with unconditioned air that the heat system (or cooling in summer) must condition. General Scale of NATURAL AIR CHANGES PER HOUR ��I 111 LEAKY HOME 1.00 15 2 .35 )5 AIRTIGHT HOME Whole house uedlatioll 02W HomeGauge.com requited or recommended. Styles & Materials Square feet of Conditioned Living Space: Average Ceiling Height: Volume of Condtioned Living Space: Total Square feet (all levels) 325 7 feet 2,275 Cubic Feet Blower Door Diagnostics: Measurement at CFM50= 187 Air Changes per hour ACH50= 4.93 Items A. Air Leak measurement for this Home (Building Enclosure) A Blower door was used to measure how much air is being pulled in from Air Leaks in your homes' "Building Enclosure" which was 187 CFM50. Another formula was then used to determine how much air changes in your home per hour with the blower door which was 4.93 ACH50. This home passes the standard WSEC of under 5 ACH50. Our measurements of square feet were based on conditioned living spaces with some estimating mainly for the purpose to determine the volume of air in the building and is not accurate enough or intended to be used for real estate value. Because of the concern about radon we recommend a radon test after Air Sealing any home. If you have not performed a radon test recently it is recommended regardless of whether or not your home is Air Sealed.The measurements given for minimum ventilation for your home may need to be adjusted if tobacco smoke or several pets exist in the home. 1624 Hoyt Ave. Unit B Page 5 of 6