The majority of range hoods have the blower located inside of the range hood itself – internal blowers.
Typically a remote blower is called for when ...
All about range hoods
blog.Custom Range Hoods
Ventless Range Hoods
| A ventless hood is the last resort if you cannot find a way to get the fumes from cooking on the range to the outside. While such a hood will trap grease and will kill odors (while the charcoal in the filter is still active - very important - charcoal filters have a limited lifespan) it will not reduce the condensation and smoke caused by cooking. This is especially a problem if you cook with gas that generates a lot of condensation. Depending on how ... |
How high should a rangehood be installed
Determining the proper height for
your rangehood is a simple matter as long as you know the height of your ceiling. Let say for example that your ceilings are 9ft high, that’s 108 inches.
...Factors effecting range hood noise
The critical factors in noise reduction are:
- Type of filters
- Quality of duct work – appropriate size for the airflow, length and number of bends
- Quality and size of blower used
Filters:
There are in essence two types of filters – mesh and baffle. Baffle filters are quieter, 96% efficient and excellent fire travel blockers. Mesh are only recommended in lower cfm applications around 400cfm to 600cfm and over electric style cook tops.
Quality of ductwork:
The most critical element is the size and quality of duct material relative to the maximum airflow you try to move down that duct – for 400cfm internal blowers we recommend 7”, for 600cfm internal blowers 8” and 1200cfm internal blowers 10”. Inline blowers between 600 and 1000cfm need 8” duct and external blowers of 1000cfm 8” duct. Rigid metal duct is strongly recommended – flexible ribbed ducting will be noisy because the air is “tripping” of the ridges and makes noise.
The average duct length and number of bends found today is not too much of an issue – if bends and length is excessive then external blowers and more powerful blowers should be used – if a blowers is trying to “PUSH” a high volume of air down a long and wavy duct run the motor needs to work harder and of course will be noisier.
Blowers:
These come in all forms of quality – the quality blowers have less mechanical noise because they are well made and balanced
Contact us if you have any questions on how to ensure your range hood installation is as quiet as possible
Blackened Steel and Stainless Range Hood
PS26 style range hood 54" wide with
blackened steel body, brushed stainless steel straps and 4" lip. Professional style stainless steel baffle filters. 1000cfm infinite speed rheostat controlled external range hood blower and dimmable
50W halogen lights. Made by Modern Aire Ventilating.54" Wide, 30" High and 24" Deep wall ...
<< MORE >>
Mantel Style Range Hood Insert
This wooden range hood canopy - otherwise known as a mantel hood - posed some challenges as it was only 14" deep and 72" wide and was over a 27" deep by 48" wide professional range with a griddle and the client BBQ's extensively indoors during the cold Ontario winters. The challenge comes in that ideally there should be full coverage over the burners otherwise any cooking that took place on the ... << MORE >>
Range Hood Terminology explained
Common Range
Hood Terms
A very common term used in ventilation is cfm –
cubic feet per minute – this typically measures the volume of air that the hood can process in 1 minute and is an
important metric in sizing the ventilation to your particular cooking environment.
You may also hear of a term static pressure – very basically this is like ...
<< MORE >>Range hood duct installation how to
Firstly we need to understand a critical element in range hood ducting – static pressure in the kitchen hood duct configuration
Follow this link to the author for additional useful range hood installation information
Static Pressure: Inside every duct, there is a constant pressure being exerted at any point from all directions. When an range hood fan moves air through the duct, the air counters resistance from this pressure which is known as static pressure. Thus, kitchen venthood fan has to have the ability to overcome the static pressure in a duct so as to effectively duct stale air to the outside of your home. This can be done by calculating the equivalent duct length of any duct for the range hood ducting.
Calculating Equivalent Duct Length (EDL): Simply measuring the length of a duct is not enough to know how much static pressure an exhaust fan has to overcome. Ducts may have one or more elbows, turns, or wall caps which add to the static pressure in a duct. Thus, you have to calculate the equivalent duct run and not the actual duct run so as to size an exhaust fan properly.
The static pressure in any duct run differs according to the material of the duct, number of elbows and turns, exterior wall cap and wall jacks etc. Listed below are the standard values for different duct components.
- Smooth metal duct: Actual duct length x 1 (eg. 3ft of duct = 3EDL
- Flex aluminum duct: Actual duct length x 1.25 (for 4”diameter duct)
Actual duct length x 1.50 (for 6”diameter duct)
- Insulated flex duct: Actual duct length x 1.50 (for 4”diameter duct)
Actual duct length x 2.00 (for 6”diameter duct)
- Wall caps/roof caps/back draft dampers: 30 feet for each cap (for 4”diameter duct)
40 feet for each cap (for 6”diameter duct)
- Elbows and turns: 15 feet for each (for 4”diameter duct)
20 feet for each (for 6”diameter duct)
For example assuming 6” ducting for the kitchen range hood:
|
10ft of straight rigid duct |
|
10 |
|
2ft of flexible alum duct |
1.5 x 2’ |
3 |
|
2 elbows |
2 x 20’ |
40 |
|
Wall cap |
1 x 30’ |
30 |
|
Back draft damper |
1 x 30’ |
30 |
|
Total EDL |
|
113EDL |
A rule of thumb is that a duct run for a range hood should not exceed 100EDL
Using the above values, you can calculate the equivalent straight duct length that an exhaust fan has to overcome so as to push stale air outside your home and counter static pressure effectively.
Inline and exterior range hood blowers
Inline and external range hood blowers
Remote range hood blowers – also referred to as external or inline blowers
The majority of range hoods have the blower located inside of the range hood itself – internal blowers.
Typically a remote blower is called for when ...
<< MORE >>
The majority of range hoods have the blower located inside of the range hood itself – internal blowers.
Typically a remote blower is called for when ...
How to fix that basic undercabinet range hood
Basic builder version under cabinet hood
A common situation we come across is new homes with the basic builder version under cabinet hood. Consumers mostly
say the following:
<< MORE >>
- Its noisy
- It doesn't capture the smoke or vapour
- Its difficult to keep clean
- Grease accumulates on the cabinets around the range hood
- Builders are under pressure to keep costs ...
Interesting discussion on the magic lung vs baffle filters
Follow this link to read unbiased consumer discussions on the magic lung filter system vs the baffle filter system - we run into this issue all the
time with range hood filters - people are sold on the "magic lung koolaid" as someone put it, the less expensive hood and don't appreciate that baffle filters are by far the best form of
filtering a range hood:
- Easy to clean
- 96% efficient ... << MORE >>
- Easy to clean
- 96% efficient ... << MORE >>
