- Energy Code Assistance
- Indoor Air Quality
- Energy Efficiency
- HVAC Design & Testing
- Building Science Training
Ventilation Design for Healthy Indoor Air!
Did you know the indoor air quality of your home can be 70 times worse than the air outside? When it comes to improving your indoor air quality, it’s a four step process:
- Seal your home up as tight as you can (our energy codes are making sure we do this).
- Remove anything that can pollute the home (anything that off gasses – Volatile Organic Compounds (VOCs), formaldehyde, harsh cleaning solutions, etc.).
- Dilute indoor air contaminants/gases left over with ventilation.
- Filter out particulates (dust, dander and other) with a Merv 13 or better filter.
Even though ventilation systems have been required by the code since 2012, many of the homes built today still lack proper ventilation. Priority Energy has been designing and installing cost-effective ventilation systems for new and existing homes across the United States for over a decade. We also influenced and helped write state requirements for ventilation.
Our IECC energy codes typically refer to ASHRAE standards for ventilation. The most common standard referenced today is ASHRAE 62.2, which is updated every three years. The ASHRAE standard is based on the size of the house in sq ft. and the number people living in the home (typically we base this on the number of bedrooms plus one).
When it comes to residential ventilation systems there are three choices:
Exhaust only systems – the most common means here is attaching a special switch to your bathroom exhaust fan which will make sure the fan runs enough to meet ventilation requirements.
Priority Energy is an industry leader, offering Mechanical Load Sizing services to maximize comfort and indoor air quality:
ACCA Manual J – A complete Manual J will give you the total heating & cooling load (necessary for the ACCA Manual S – Equipment Selection) along with room-by-room loads (necessary for an accurate ACCA Manual D – Duct Design) so the installed systems heating/cooling capacity can be appropriately distributed among the home to maximize comfort.
ACCA approved software must be utilized For ACCA manual J to be accurate (click here for a list of approved software programs). Priority Energy utilizes the latest version of Wrightsoft Right J8 for all load calculations.
ACCA Manual S – A total block load created with the ACCA Manual J will provide the designer the total heat loss for heating and the total heat gain (latent and sensible) for cooling. With the total heat load/gain, the designer will be able to select the exact furnace, AC/heat pump, and evaporator coil necessary to meet the home’s heating and cooling loads. This is required for permitting in the State of IL under the IECC 2015
ACCA Manual D – An ACCA Manual D will give you a duct diagram from the furnace/air handler to the registers, including all ductwork, connections/fittings and registers. A duct system designed with ACCA approved software will give you a quiet duct system that will extend the life of the furnace/AC and decrease comfort complaints from the buyers/homeowners.
Click here to see a sample of a complete Mechanical Sizing Report necessary for code compliance.
Other Resources on Mechanical Sizing
Priority Energy can provide an ACCA Manual J/D/S at competitive rates within 48 hours. Contact us to discuss your plans today.
Priority Energy was recently rated the No. 1 Aeroseal dealer in Chicagoland; proudly serving builders, HVAC companies, home owners, and commercial property owners since 2010.
The Newman Restoration Group just completed a workshop with Mr. Schildgen on insulation. weatherization and indoor air quality. The one-day curriculum led students through building science principles and a hands-on practice with props.