Btu Vent
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 Mr Heater 20000 BTU Propane Blue Flame Vent Free Heater VF20KBLUELP $99.99 Time Remaining: 28d 21h 11m Buy It Now for only: $99.99 |
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 KozyWorld 6000 BTU LP Gas Propane Infrared Vent Free Wall Heater $115.00 Time Remaining: 25d 19h 4m Buy It Now for only: $115.00 |
 Empire BF 30 Blue Flame Vent Free Heater 30000 BTU $399.95 Time Remaining: 24d 3h 9m Buy It Now for only: $399.95 |
 Kozy World KWN323 5 Plaque Infrared 30000 BTU Natural Gas Vent Free Wall Heater $229.99 Time Remaining: 13d 8h 7m Buy It Now for only: $229.99 |
 HearthRite Vent Free Ceramic Heater 10000 BTU LP $214.99 Time Remaining: 18d 1h 29m Buy It Now for only: $214.99 |
 EMPIRE 18000 BTU Vent Free LP Space Heater SR18T $349.88 Time Remaining: 8d 10h 36m Buy It Now for only: $349.88 |
 HearthRite Vent Free Thermostat Heater 10000 BTU NG $214.99 Time Remaining: 22d 1h 56m Buy It Now for only: $214.99 |
 New White Q Mark Wall Heater Vent 208 V 6000 BTU Model $193.35 Time Remaining: 15d 1h 1m Buy It Now for only: $193.35 |
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 PROCOM 20K BTU NATURAL GAS WALL HEATER VENT FREE TSTAT $134.95 Time Remaining: 1d 22h 30m Buy It Now for only: $134.95 |
 Kozy World KWP112 2 Plaque Infrared 10000 BTU LP Gas Vent Free Wall Heater $109.99 Time Remaining: 23d 6h 22m Buy It Now for only: $109.99 |
 Slim Profile Direct Vent Wall Heater 8K BTU Gas HWDV080DVN $429.99 Time Remaining: 8d 22h 8m Buy It Now for only: $429.99 |
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 Garage Heater MrHeater MHU45 45000BTU W Horz Vent Kit $518.95 Time Remaining: 27d 20h 34m Buy It Now for only: $518.95 |
 KozyWorld GGD328 30000 BTU Blue Flame Dual Fuel Vent Free Gas Garage Wall Heater $194.99 Time Remaining: 20d 6h 19m Buy It Now for only: $194.99 |
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 Garage Heater MrHeater MHU75 75000BTU W Horz Vent Kit $598.95 Time Remaining: 27d 20h 37m Buy It Now for only: $598.95 |
 COMPACT VENT FREE 30000 BTU SPACE HEATER NATURAL GAS $364.99 Time Remaining: 18d 20h 43m Buy It Now for only: $364.99 |
 KozyWorld 30000 BTU Natural Gas Infrared Vent Free Wall Heater $205.00 Time Remaining: 25d 18h 51m Buy It Now for only: $205.00 |
 Empire 18000 BTU Vent Free Natural Gas Heater SR18T $349.99 Time Remaining: 23d 8h 40m Buy It Now for only: $349.99 |
 Mr Heater 10000 BTU Propane Radiant Vent Free Heater VF10KRADLP $168.83 Time Remaining: 21d 20h 35m Buy It Now for only: $168.83 |
 HEATER LP or NG Vent Free 25000 BTU 1000 SF $438.00 Time Remaining: 8d 7h 31m Buy It Now for only: $438.00 |
 PRO COM MD300TBA DUAL FUEL BLUE FLAME VENT FREE WALL HEATER 30000BTU NEW $233.99 Time Remaining: 26d 19m Buy It Now for only: $233.99 |
 Williams Forsaire 40000 BTU Direct Vent Natural Gas Wall Furnace Heater 4007732 $99.99 Time Remaining: 6d 4h 26m |
 18000 BTU Natural Gas Infrared Vent Free Wall Heater $150.00 Time Remaining: 24d 22h 28m Buy It Now for only: $150.00 |
 KOZY WORLD KWN321 5 PLAQUES NATURAL GAS VENT FREE INFRARED WALL HEATER 30000 BTU $232.95 Time Remaining: 13d 29m Buy It Now for only: $232.95 |
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 HYDROTHERM 140 K BTU INTERMITTENT PILOT CAST IRON NAT GAS BOILER GRAVITY VENT $2,199.99 Time Remaining: 7d 21h 11m Buy It Now for only: $2,199.99 |
 KOZY WORLD KWP112 2PLAQUE INFRARED WALL HEATER LP PROPANE VENT FREE 10000 BTU $145.95 Time Remaining: 8d 20h 7m Buy It Now for only: $145.95 |
 Mr Heater MRHF255474 Vent Free 2044000 BTU Blue Flame44 Liquefied $247.34 Time Remaining: 23d 15h 9m Buy It Now for only: $247.34 |
 KOZY WORLD KWN111 2 PLAQUES NATURAL GAS VENT FREE INFRARED WALL HEATER 10000 BTU $145.95 Time Remaining: 13d 1h 2m Buy It Now for only: $145.95 |
 PROCOM ML100TPA 2 PLAQUE LP VENT FREE GAS WALL HEATER W AUTO THERMOSTAT 10K BTU $140.99 Time Remaining: 21d 1h 35m Buy It Now for only: $140.99 |
 Empire SR 10T Vent Free Radiant Gas Heater 10000 BTU $339.95 Time Remaining: 24d 3h 57m Buy It Now for only: $339.95 |
 Empire BF 30 Blue Flame Vent Free Heater 30000 BTU Blue Flame Free Shipping $349.99 Time Remaining: 2d 22h 47m Buy It Now for only: $349.99 |
 Williams 2203621 22000 BTU Direct Vent Wall Furnace Heater Propane LP In Stock $799.95 Time Remaining: 21d 22h 51m Buy It Now for only: $799.95 |
 ProCom 20000 BTU Dual Fuel Vent Free Blue Flame Heater with Blower Base NG LP $239.95 Time Remaining: 7d 29m Buy It Now for only: $239.95 |
 HYDROTHERM 175K BTU RESIDENTIAL GRAVITY VENT CONSTANT PILOT NATURAL GAS BOILER $1,849.99 Time Remaining: 4d 5h 46m Buy It Now for only: $1,849.99 |
 KOZY WORLD KWP322 VENT FREE INFRARED WALL HEATER 5PLAQUE LP PROPANE GAS 25000BTU $232.95 Time Remaining: 6d 4h 50m Buy It Now for only: $232.95 |
 CAST IRON NATURAL GAS SPARK PILOT WATER BOILER 125K BTU GRAVITY VENTED BRAND NEW $1,599.99 Time Remaining: 21d 20h 40m Buy It Now for only: $1,599.99 |
 HYDROTHERM HVX 70 RESIDENTIAL POWER VENTED CAST IRON NATURAL GAS BOILER 70 K BTU $1,479.99 Time Remaining: 3d 20h 42m Buy It Now for only: $1,479.99 |
 KOZY WORLD GWD104 DUAL FUEL MANUAL WALL HEATER VENT FREE 10000 BTU NEW $157.95 Time Remaining: 12d 23h 43m Buy It Now for only: $157.95 |
 Williams 6508732 Forsaire 65000 BTU Top Vent Counterflow Furnace Natural Gas $1,059.95 Time Remaining: 25d 57m Buy It Now for only: $1,059.95 |
 Williams 3003622 30000 BTU Direct Vent Wall Furnace Heater Natural Gas In Stock $849.95 Time Remaining: 21d 23h 19m Buy It Now for only: $849.95 |
 HearthRite Vent Free Thermostat Heater 30000 BTU LP $319.99 Time Remaining: 22d 1h 57m Buy It Now for only: $319.99 |
 HearthRite Vent Free Blue Flame Heater 10000 BTU LP $179.99 Time Remaining: 22d 1h 56m Buy It Now for only: $179.99 |
 KOZY WORLD KWP110 VENT FREE INFRARED WALL HEATER 1 PLAQUE LP PROPANE GAS 6000BTU $135.95 Time Remaining: 6d 4h 14m Buy It Now for only: $135.95 |
 Empire BF 20 Blue Flame Vent Free Heater 20000 BTU $349.95 Time Remaining: 24d 3h 46m Buy It Now for only: $349.95 |
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Design Your Own Kitchen-Here’s How Article #2-Ventilation Systems
by Jeremy Myers
This is a series of articles about kitchen design and the things that you should consider when either designing a kitchen from scratch or attempting a remodel of an existing kitchen that is outdated or inadequate for your needs. I am attempting to present the topics in the order that I would deal with them if I were acting as a paid kitchen designer.
In the last article Defining Goals-Storage Capacity,I explained in detail how to determine the overall storage needs of a kitchen in terms of cubic footage. I ended that article with a bulleted list of what could be done if it turns out that you really do need more storage capacity rather than just a simple update of the existing cabinets. That list was ordered from the lowest cost solutions and moving up with the most expensive solution of selling the existing residence and buying a larger one! This article deals with ventilation systems, the next logical item to consider in the design process.
I know this particular topic might not seem all that sexy to some people, but a kitchen without a well designed ventilation system is going to be an unhappy place in a stinky home. All those exhaust gasses, steam and cooking odors need to be vented to the outside-no doubt about it If they don’t go outside, they’ll be absorbed by your walls, clothing, carpets and anything else in the area with unhappy results.
When I was working as a paid kitchen designer I occasionally had clients who for a variety of reasons wanted to either eliminate or short-change the ventilation system despite my advise to the contrary. I was fine with that as long as they were willing to sign a document acknowledging that I advised them of the potential problems of a kitchen lacking adequate ventilation and asked them to remove my liability in that area, specifically and in writing. Needless to say, that usually changed their attitude about the topic.
Proper ventilation depends on a few key factors, that when you think about are not all the hard to understand. First, the cooking process generates heat, and heat rises. Second, the volume of ventilation required is dependent on how much heat (or stink) is being generated. So given the foregoing it’s pretty easy to size a venting system that will always be able to keep up with the demands placed on it.
A good rule of thumb is to size a venting system to provide one cubic-foot-per minute (CFM) of venting power for each 100 BTU being generated by the cooking appliance. Simply put, CFM is a measure of the volume of air being evacuated by the venting system each minute and BTU (British Thermal Units) is a measure of the amount of heat being generated by a cooking appliance. Fortunately for us, stoves and ranges are rated in BTU’s so it’s easy to get a handle on how much venting might be required for each situation.
Almost all hoods and vents are supplied with specifications as to venting capacity and ducting requirements for proper operation. The key thing to keep in mind is that moving air develops resistance as it travels through a ducting system. The smaller the vent pipe, the longer it has to travel (“the run”) and the more turns it takes all increase the amount of power that the venting system will have to supply to move adequate air. Manufacturer’s supplied specifications for all venting appliances should make all of this clear. I’ve found the manufacturer’s Reps and Customer Service people to be an invaluable resources when I have questions about this sort of thing so I always call to confirm my design parameters before ordering.
In terms of WHERE to run your ducting, I would recommend that you consult with a trusted general contractor. Even the simplest ducting plan should have the blessing of someone who has X-Ray vision and can see into walls and ceilings to determine how ducting pipes will twist and turn on their way from your stove to the great outdoors. Because the length and layout of ducting in part determines the fan sizing of the venting system you really have to get this nailed before any shopping takes place. Once you have the ducting plan in place, you can proceed with confidence.
All else being equal, the most efficient venting system is a range hood that is 6” wider than the stove it is venting and placed at an appropriate height above the cooking surface. Wherever possible this is the type of system that I strongly recommend to clients as their first pick. The over-range hood is the most efficient of all venting systems because heat rises and is easily captured by the sump of the hood where it can pumped out of the house by the vent fan. The range hood is also desirable because in many cases it is fully customizable for your needs. These days even low end hoods may give you a choice of fan sizing, lighting options, heat sensors to automatically control the fan power and other goodies.
All you really need to know to design a system with a range hood of this type is the maximum amount of BTU’s being generated by your range with all burners going plus considerations as to ducting as explained previously. It’s also worth paying attention to the amount of noise being generated by the fan system. Noise is measured in sones, the lower the sone rating the quieter the fan-it’s worth paying a little more to get those sones down! Again, I highly recommend that you contact the Manufacturer’s customer service department to confirm overall system design and capacity of any venting system that you are considering. As an aside, you may see very sleek looking euro-style hoods that lack a sump, meaning they have open sides and back-they don’t vent for beans, so forget them.
If you are unable to design with a vent hood, the next choice in my view the is the venting microwave which is quite a step down from a real hood. A microwave venting system is far less optimum than a true vent hood because it has no sump to collect exhaust gasses, has a low exhaust capacity and is very noisy for the amount of air being moved. Many of them are erroneously installed as recirculating units, meaning they just blow exhaust gasses right back in your face after passing the air through a tiny activated-carbon filter panel. Most over-range microwaves can be installed to externally vent, but you have to make sure this is done correctly by the installer. I don’t know how many of these I’ve seen installed to vent back into the house……yuck!
In my considered view, the most inneficient venting system is the down-draft fan unit that comes with some ranges. These operate by pulling air across the surface of the range and exhausting it down and through ducting to the outside of the residence. Aside from the fact that you loose practically all of your under range storage, they are noisy as the devil and don’t really do anything except pull all the heat off the range and away from the food your are trying to cook. You may have one of these things once, but after that it’s over, baby.
One final note and a safety warning. All ventilation systems are pumping air out of your home and that air has to come from somewhere. In the case of the larger systems you could be moving up to 500 cubic feet per minute or more which is quite a lot. You need to crack a window or door near or in the kitchen to provide so called 'makeup air' to enter the residence. If you don't provide a handy source of makeup air when running the vent system you could be creating a real carbon monoxide hazard as explained below.
If you run your fan system with all doors and windows tightly closed, fresh air will be pulled down through an open chimney flue, or more dangerously down through the venting system of your gas fired water heater or space heater. This is known as 'back drafting" and is a dangerous condition because there is the potential to pull carbon monoxide back down into the residence. Carbon monoxide is invisible, odorless and deadly in high concentrations. I would strongly recommend that you install a carbon monoxide alarm in your utility room so that if back drafting IS pulling poison gas back down a flue, you'll know about it.Better yet, always remember to open a window or door to provide makeup air when running your vent system!
In the next article we’ll talk a little more about appliance choices. Then I’m going to show you how to layout a proper kitchen on paper and begin to formalize plans for construction.
About the Author
Jeremy Myers is a wedding officiant and owner of Lyssabeth's Wedding Officiants. Visit his websites at Lyssabeth's Oregon Wedding Officiants , Lyssabeth's Monterey Wedding Officiants and Lyssabeth's Colorado Wedding Officiants.