Compliance
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The Compliance tab contains both program and code information. Code language is excerpted and summarized below. For exact code language, refer to the applicable code, which may require purchase from the publisher. While we continually update our database, links may have changed since posting. Please contact our webmaster if you find broken links.
ENERGY STAR Single-Family New Homes, Version 3/3.1 (Rev. 11)
National Rater Field Checklist
HVAC System.
7. Dwelling Unit Mechanical Ventilation Systems (&#;Vent System&#;) 45 & Inlets In Return Duct 46
7.4 System fan rated &#; 3 sones if intermittent and &#; 1 sone if continuous, or exempted. 51
8. Local Mechanical Exhaust - In each kitchen and bathroom, a system is installed that exhausts directly to the outdoors and meets one of the following Rater-measured airflow and manufacturer-rated sound level standards: 47, 57
National Rater Field Checklist: Local Mechanical Exhaust. (Source: ENERGY STAR Single-Family New Homes, Version (Rev. 11))
Footnote 45) As defined by ANSI / RESNET / ICC Std. 301-, a Dwelling Unit Mechanical Ventilation System is a ventilation system consisting of powered ventilation equipment such as motor-driven fans and blowers and related mechanical components such as ducts, inlets, dampers, filters and associated control devices that provides dwelling-unit ventilation at a known or measured airflow rate.
Footnote 46) Item 7.3 applies to any outdoor air inlet connected to a ducted return of the dwelling unit HVAC system, regardless of its intended purpose (e.g., for ventilation air, make-up air, combustion air). This Item does not apply to HVAC systems without a ducted return.
Footnote 47) The Dwelling Unit Mechanical Ventilation System air flows and local exhaust air flows shall be determined and documented by a Rater using ANSI / RESNET / ICC Std. 380 including all Addenda and Normative Appendices, with new versions and Addenda implemented according to the schedule defined by the HCO that the home is being certified under.
Footnote 51) Dwelling Unit Mechanical Ventilation System fans shall be rated for sound at no less than the airflow rate in Item 2.3 of the National HVAC Design Report. Fans exempted from this requirement include HVAC air handler fans, remote-mounted fans, and intermittent fans rated &#; 400 CFM. To be considered for this exemption, a remote-mounted fan must be mounted outside the habitable spaces, bathrooms, toilets, and hallways and there shall be &#; 4 ft. ductwork between the fan and intake grill. Per ASHRAE 62.2-, habitable spaces are intended for continual human occupancy; such space generally includes areas used for living, sleeping, dining, and cooking but does not generally include bathrooms, toilets, hallways, storage areas, closets, or utility rooms.
Footnote 57) Continuous bathroom local mechanical exhaust fans shall be rated for sound at no less than the airflow rate in Item 8.2. Intermittent bathroom and both intermittent and continuous kitchen local mechanical exhaust fans are recommended, but not required, to be rated for sound at no less than the airflow rate in Items 8.1 and 8.2. Per ASHRAE 62.2-, an exhaust system is one or more fans that remove air from the building, causing outdoor air to enter by ventilation inlets or normal leakage paths through the building envelope (e.g., bath exhaust fans, range hoods, clothes dryers). Per ASHRAE 62.2-, a bathroom is any room containing a bathtub, shower, spa, or similar source of moisture.
Footnote 58) An intermittent mechanical exhaust system, where provided, shall be designed to operate as needed by the occupant. Control devices shall not impede occupant control in intermittent systems.
Footnote 59) Kitchen volume shall be determined by drawing the smallest possible rectangle on the floor plan that encompasses all cabinets, pantries, islands, peninsulas, ranges / ovens, and the kitchen exhaust fan, and multiplying by the average ceiling height for this area. In addition, the continuous kitchen exhaust rate shall be &#; 25 CFM, per IRC Table M.3, regardless of the rate calculated using the kitchen volume. Cabinet volume shall be included in the kitchen volume.
Footnote 60) Homes shall meet this Item. Alternatively, the prescriptive duct sizing requirements in Table 5.3 of ASHRAE 62.2- / / are permitted to be used for kitchen exhaust fans based upon the rated airflow of the fan at 0.25 IWC. If the rated airflow is unknown, &#; 6 in. smooth duct shall be used, with a rectangular to round duct transition as needed. Guidance to assist partners with these alternatives is available at ENERGY STAR New Homes Guidance. As an alternative to Item 8.1, homes are permitted to use a continuous kitchen exhaust rate of 25 CFM per IRC Table M.3, if they are either a) PHIUS+ or PHI certified, or b) provide both dwelling unit ventilation and local mechanical kitchen exhaust using a balanced system, and have a Rater-verified whole-building infiltration rate &#; 1.0 ACH50 or &#; 0.05 CFM50 per sq. ft. of Enclosure Area, and a Rater-verified dwelling unit compartmentalization rate &#; 0.30 CFM50 per sq. ft. of Enclosure Area if multiple dwelling units are present in the building. &#;Enclosure Area&#; is defined as the area of the surfaces that bound the volume being pressurized / depressurized during the test.
Footnote 61) All intermittent kitchen exhaust fans must be capable of exhausting at least 100 CFM. In addition, if the fan is not part of a vented range hood or appliance-range hood combination (i.e., if the fan is not integrated with the range), then it must also be capable of exhausting &#; 5 ACH, based on the kitchen volume.
Please see the ENERGY STAR Single-Family New Homes Implementation Timeline for the program version and revision currently applicable in your state.
DOE Zero Energy Ready Home (Revision 07)
Exhibit 1 Mandatory Requirements.
Exhibit 1, Item 1) Certified under the ENERGY STAR Qualified Homes Program or the ENERGY STAR Multifamily New Construction Program.
Exhibit 1, Item 6) Certified under EPA Indoor airPLUS
International Energy Conservation Code (IECC)
Section 403.5 Mechanical ventilation (Mandatory). Automatic or gravity dampers are installed on all outdoor air intakes and exhausts.
, , , and International Energy Conservation Code (IECC)
Section R403.5 (R403.6 in , , and IECC) Mechanical ventilation shall meet the requirements of the International Residential Code or the International Mechanical Code. Automatic or gravity dampers are installed on all outdoor air intakes and exhausts. Table R403.5.1 (R403.6.1 in and IECC and R403.6.2 in IECC) Mechanical Ventilation System Fan Efficacy for range hood and in-line fans shall be at least 2.8 cfm/watt.
Retrofit: , , , , and IECC
Section R101.4.3 (in and ). Additions, alterations, renovations, or repairs shall conform to the provisions of this code, without requiring the unaltered portions of the existing building to comply with this code. (See code for additional requirements and exceptions.)
Chapter 5 (in , , ). The provisions of this chapter shall control the alteration, repair, addition, and change of occupancy of existing buildings and structures.
International Residential Code (IRC)
Section M.3 Ventilation rate. Kitchen fans should have an exhaust rate of 100 cfm intermittent or 25 cfm continuous.
IRC
M Range Hoods Range hoods should discharge to the outdoors through a metal duct made of galvanized steel, stainless steel, or copper; with a smooth interior surface that is air tight and equipped with a back draft damper. The duct should be independent of other exhaust systems and should not terminate in an attic, crawl space, or other inside space. Exhaust fans capable of exhausting &#; 400 cfm should be mechanically or naturally provided with makeup air at a rate equal to the exhaust air rate. The makeup air system should have a gravity or electrically operated damper that automatically opens when the system operates and that is accessible for inspection.
M Microwaves installed over a listed and labeled cooking appliance shall conform to the terms of the microwave&#;s listing and label and manufacturer&#;s installation instruction. The microwave oven shall also conform to UL 923.
M Open-top broiler units should have a min. 28-gauge metal exhaust hood with ¼-inch clearance between the hood and the underside of combustible material or cabinets. The hood should be at least as wide as the broiler, and extend over the entire unit, discharge to the outdoors, and be equipped with a back draft damper.
M Exhaust opening should terminate at least 3 feet from property lines, 3 feet from operable and non-operable openings into the building, and 10 feet from mechanical air intakes, except where the opening is located 3 feet above the air intake.
M The whole-house mechanical ventilation system shall consist of one or more supply or exhaust fans, or a combination of such and associated ducts and controls. Local exhaust or supply fans are permitted to serve as such a system. Outdoor air ducts connected to the return side of an air handler shall be considered as providing supply ventilation. The whole-house mechanical ventilation system shall be provided with controls that enable manual override.
The whole house mechanical ventilation system shall provide outdoor air at a rate equivalent to the minimum rates shown in Tables M.3.3(1) and M.3.3(2), which are based on the home's floor area.
Local exhaust rates (per Table M.4) Kitchen fans should have an exhaust rate of 100 cfm if operated intermittently or 25 cfm if operated continuously.
IRC
Same as . Duct length and diameters are specified in Table M.2 and are based on the fan flow rate, which should be in accordance with ANSIE/AMCA 210-ANSIE/ASHRAE 51.
and IRC
Section M Domestic Cooking Exhaust Equipment describes requirements for exhaust equipment associated with kitchens and kitchen appliances. Overhead range hoods and downdraft exhaust equipment with integral fans shall comply with UL507. M.3 Exhaust discharge states that domestic cooking exhaust shall discharge tot he outdoors through a duct. The duct shall have a smooth interior surface, shall be airtight, shall be equipped with a backdraft damper and shall be independent of all other exhaust systems.
Retrofit: , , , , and IRC
Section R102.7.1 Additions, alterations, or repairs. Additions, alterations, renovations, or repairs shall conform to the provisions of this code, without requiring the unaltered portions of the existing building to comply with the requirements of this code, unless otherwise stated. (See code for additional requirements and exceptions.)
Appendix J regulates the repair, renovation, alteration, and reconstruction of existing buildings and is intended to encourage their continued safe use.
American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) 62.2-, ASHRAE 62.2-, and ASHRAE 62.2-
ASHRAE Standard 62.2 Ventilation for Acceptable Indoor Air Quality in Low-Rise Residential Buildings (available for purchase at link above). The standard provides minimum requirements for mechanical and natural ventilation systems intended to provide acceptable indoor air quality in low-rise residential buildings.
American National Standards Institute (ANSI)/Residential Energy Services Network (RESNET)/International Code Council (ICC) 380-
Standard for testing Airtightness of Building Enclosures, Airtightness of Heating and Cooling Air Distribution Systems, and Airflow of Mechanical Ventilation Systems. Section 5.1 defines procedures for measuring the airflow of a mechanical ventilation system including a powered flow hood, an airflow resistance device, or a passive flow hood.
For more information, please visit kitchen exhaust fan supplier.
Most kitchen vent hoods are designed to remove grease from cooking fumes.
Having a vent hood in your kitchen has many advantages. First and foremost, it will decrease the possibility of a leak of the dangerous chemical carbon monoxide.
Additionally, vent hoods will improve the quality of the air within the structure.
This installation is designed to protect against grease fires. It will make cooking healthier and save you money. Another reason to get a vent hood is that it's highly aesthetically pleasing in kitchens.
If you're not sure whether or not you need a kitchen vent hood, then read on.
A vent hood pulls smoke and odors away from the area and pushes air into the kitchen to keep it clean and free of harmful gases. Unfortunately, you'll be subjected to daily inhalation of those foul odors if you don't install one.
The best way to find out if you need a kitchen vent is to check your local building codes. Some states require that all kitchens have them installed or at least adhere to the proper ventilation requirements. Other states only need them for commercial kitchens.
In some areas, you can get an exemption if you prove that you already have a ventilation system.
Kitchen vent hoods come in two basic types:
1) The exhaust type: These are used when there's no other source of fresh air available. They pull smoke and odors outside through ductwork.
2) The recirculation type: This kind of hood uses fans to push air back into the room where it was generated. It doesn't use ductwork to move air around.
Both kinds of hoods are suitable for removing odors and toxins. Still, they each come with their own set of benefits and drawbacks. Let's take a deeper look at each type.
These types of hoods are usually found in restaurants and large commercial kitchens. They're also known as "ducted" vents because they use ducting to carry the fumes outside.
Advantages:
Disadvantages:
These types of hoods are typically found in smaller homes and apartments. They're also called "fan-assisted" vents because they use fans to circulate air throughout the kitchen.
Advantages :
Disadvantage:
Kitchen vent hoods use fans to pull air through filters. Grease and other pollutants are trapped by the filters and then released back into the area. This makes them much safer than traditional exhaust systems.
But how does this actually happen?
It creates smoke when you cook with oil, grease, or fat. Smoke contains tiny droplets of water vapor. These droplets condense when they hit cold surfaces. That means they form tiny drops of water in your kitchen.
When these droplets fall onto the floor, they create puddles. So long as there's sufficient moisture in the air, these puddles will eventually evaporate. But the puddles will stay around forever if there isn't enough humidity.
That's where kitchen vent hoods come in. They draw air through their filters and release it outside. Then they push fresh air back into the kitchen. So, you'll be breathing in cleaner air instead of breathing in the smoke.
A range hood improves air quality and reduces grease buildup in kitchens. Cooking fumes are removed from the air and captured before they enter the home.
As a result, grease and moisture buildup on surfaces such as the stovetop, oven door, and countertops are easily cleaned off.
Here are more benefits of installing kitchen vent hoods listed below:
Some states require kitchen vent hoods or range hoods to be installed to meet ventilation requirements. Others allow exemptions based on existing ventilation systems. If you live in one of those states, make sure you know about the laws regarding kitchen ventilation.
If your local area does not require kitchen vents, you may still want to install one.
The cost of installing a kitchen vent hood varies depending on the size of your kitchen and how much work you plan to do yourself.
Check out these excellent custom range hoods that increase the home's worth and improve ventilation simultaneously. You can choose from several range hoods, some of which are made of stainless steel or copper, and you can even order custom hoods.
Cooking fumes can cause respiratory issues. A lack of ventilation makes kitchen environments more prone to water damage. Exhaust systems help prevent household pollutants from entering the home.
Kitchen ventilation systems remove harmful gases and aerosols from the air. This keeps them out of the home and away from people who spend time indoors.
When you cook, you create carbon monoxide (CO) gas. CO is colorless and odorless. But it's hazardous. Carbon monoxide exposure can cause headaches, nausea, vomiting, dizziness, confusion, seizures, coma, and even death.
When cooking with gas stoves, exhaust fans help prevent CO from building up inside the home. The fan pulls smoke and other combustion products through ductwork and out of the house.
Exhaust fans also help prevent water damage. Smokey smells, and soot can ruin wood floors and walls. An exhaust system removes this waste from the home.
In most cases, you'll need a kitchen exhaust fan if you have a gas stove.
In addition to the fan, you may also need a kitchen vent hood. If you own a commercial kitchen, however, you almost certainly will need to have some sort of vent hood or range hood.
A kitchen vent hood is required by law in many states. Some states only require a kitchen vent hood if you have a gas oven. Other states require a kitchen vent hood regardless of whether you use gas or electric appliances.
Most states require a kitchen vent connected to a chimney or exhaust to pull smoke and other combustion products out of the home.
While some states require a kitchen vent connected to the roof or ductwork. They draw the smoke and other combustion products outside the home.
Standard pizza ovens don't need hoods. Pizza ovens have different types of ventilation, and some lack exhaust fans. Others feature a bottom-mounted exhaust vent. Some have an exhaust fan.
Woodfire pizza ovens usually have a chimney to vent smoke. The size of your pizza oven could determine if you need a hood. Smaller ovens don't need them. Larger ones might.
A steam kettle doesn't have to be under a hood. Many manufacturers make kettles without a hood; some even come with a built-in venting system. If a unit doesn't have a hood, it won't emit carbon monoxide.
You probably don't, as you will be barbequing outside. As a result, the smoke and grease released during cooking will go out into the atmosphere and won't be trapped indoors. However, if you have a BBQ indoors or in a commercial kitchen, you will need a ventilation hood.
An induction cooktop is a good choice if you don't want to use a traditional stove. A range hood will help keep cooking odors out of the home and prevent grease buildup inside the cooktop. Induction cooktops produce less smoke than gas units, so they're considered safer options and usually won't require a kitchen vent hood.
No. Electric stoves are generally safe to operate without a kitchen vent hood. However, most models include a built-in exhaust system that pulls smoke and fumes away from the appliance.
Ductless hoods are effective at removing smoke and gases from kitchens. They work best when installed correctly. They can be expensive, but they do offer several advantages over conventional kitchen exhaust systems, including:
In conclusion, kitchen vent hoods aren't necessary if you have a well-designed kitchen. But if you're looking to add a little extra ventilation to your cooking space, they're definitely worth considering.
They can also save you money over time because they reduce the smoke and grease inside your home. And, when you consider that they're relatively inexpensive, they may even be a worthwhile investment.
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