Humidity and Ventilation
Heat Recovery Ventilators - HRV
Moisture Generated in the House can come from many sources - people, pets, cooking, showering, fish tanks, drying cloths
born moisture can be produced and all this moisture which is captured in the air as humidity should be directed outside, if
not then there is a real possibility that this high level of humidity can condense on cold surfaces such as windows, behind
cold toilet tanks, on cold water pipes or cold surfaces such as exterior facing walls and possibly produce condensation or
water and long term it may produce mold and damage building components.

Controlling the
Humidity Generated in the House is key, too high and you may produce moisture related problems like mold,
musty smells and or water damage, too low and you may feel dry throat, breathing problems, static shocks etc. In New
Construction - Homes are even more susceptible to moisture, due to the amount of water used in construction materials
which will evaporate over the first few years - can damage wood floors, cabinets and produce very high levels of moisture in
basements behind insulation and on cold water pipes.
HRV's Heat Recovery Ventilators are also being installed in many of
the newer homes to help reduce the humidity/moisture levels. In some cases
Dehumidifiers may be required in basements.

Where do you Ventilate:

1. Washrooms
- Fans in washrooms should always be left on for approx 25-30 minutes especially after showers or the
very least a window should be left open to help draw that moist air outside. You may want to provide a timer for the fan. I
find timers to be more useful since it's easy to push a button and walk away. Some people feel connecting the fan switch to
the light switch is an option. Personally I don't like this since most people will turn off the light switch when they finish in the
washroom, however you may still need more time to reduce the humidity level in the washroom. For more info click the
following links;
HVI Washroom Fan Guide, CMHC Washroom Fan Guide and Choosing an Energy Efficient Fan.

2. Kitchens - Range Hoods should also be used during and after cooking. Some earlier construction used flow through
range hoods which only captures the grease and not the humidity. Ideally range hoods should vent DIRECTLY outside. For
more info click the following links;
HVI Kitchen Range Hood Guide, CMHC Range Hood Guide and Choosing an Energy
Efficient Fan

3. Laundry Rooms - If you have a laundry room with a ceiling fan, you should be running this fan during the drying cycles.

4. Cold Cellars (Cantina) - Basement cold cellars will typically have a window or a vent hole - this is used to allow fresh air
into the cold cellar to help reduce the humidity level, which can condense to moisture when the temperature starts to drop.
Don't block these holes or you may get musty smells and or water damage.

5. Basements - Already indicated above - may require a Dehumidifier which can help reduce the moisture levels.

6. Attic - Most attic's will have roof venting and or soffit venting, some will have turbines and some will have fan's inside the
attic which will have either a manual switch or controlled by humidity levels. Attic ventilation or venting is required to reduce
the possibility of humidity condensing on the attic walls causing water related damages such as
attic mold.

FYI - have you noticed a switch directly above the furnace thermostat, usually located on the main floor family room, and
when you turn it on nothing happens, well the next time you turn it on see if the upstairs bathroom fan turns on. This is
called a Ventilation Fan Switch and what it does is it controls the upstairs bathroom fan so when the hot moist air rises the
fan can help suck it outside. It should be a three-way switch which means the fan can be turned on/off upstairs and or at
the switch above the furnace thermostat. Fell free to use it on those cold days when you don't want to open the window but
make sure the bathroom door is open.
Humidity and Ventilation
Why We use HRV's
A long time ago, homes were not as tightly insulated. Due to outside winds many air exchanges through the house would occur
which would allow fresh air to be circulated inside the house and at the same time remove humid moist air. As energy prices
insulation...although this began to cut down on energy bills another issue began to emerg...to much moisture was developing
inside the house, this moisture would condense on colder surfaces and begin to cause mold/rot damages.

A Heat Recovery Ventilator was developed which would take the warm moist air from inside of the house, channel it through an
HRV unit which would pass the air next to another channel of fresh air from the outside, thus heating the outside air up before it
comes back into the house. Heating the air this way saves on energy costs because you don't use your furnace to heat the
incoming air.

About HRV'S
Canada Mortgage and Housing Corporation CMHC has much more information on their website
Heat Recovery Ventilator which
will provide the benefits, description, how much you may save and design in much more detail. You can also look over the
Natural Resources Canada NRC guide on
Heat Recovery Ventilators.

It's also important that you keep these HRV units clean. There are filters inside which get dirty and require changing, as well as
the unit itself may require cleaning due to the dirt and dust carried by the moisture collecting inside. CMHC has a video on
Maintaining your Heat Recovery Ventilator which I encourage you to watch.

Using an HRV
Many times people would ask me when do I use this HRV. It depends on your house and how air tight it is. There is a control
which is usually located near the thermosts for the furnace, sometimes the control is located near the HRV unit. There are a few
settings which can be used - Intermittent, Low and High. If you read
chapter 4 page 17 of the NRC Guide it will help you decide
which setting is best for your specific needs.
Heat Recovery Ventilators - HRV
Air Pollution - City Wide Map!
Did you know that based on an April 2014 Toronto Public Health Report (Path to Healthier Air: Toronto Air Pollution
Burden of Illness Update) report that more than half of Toronto's air pollution is emitted within the city's boundaries itself.

Toronto Public Health estimates that air pollution in Toronto currently contributes to 1,300 premature deaths and 3,550
hospitalizations annually. This represents a decrease of 23% in premature deaths and 41% in hospitalizations as
compared with 2004.

A not-for-profit environmental watch dog,
Toronto Environmental Alliance or TEA and Environment Hamilton have teamed
up to launch the
 INHALE - Initiative for Healthy Air & Local Economies Project. They have devised a unique approach to
monitoring the air quality. By using compact and easy to operate air quality monitors and GPS devices which can be
strapped to backpacks, bicycles, strollers and wheelchairs the devices can automatically draw in air and count the
volume of fine particulates which in turn can provide a guide to the air quality for that specific area of the city and TEA
has also gone one step further by actually mapping those findings on a city wide map
(Fresh Air Finder Map) (as of today
South Etobicoke, Toronto and Hamilton have been mapped)...I highly recommend you read the full article in the
York Mirror Thursday June 23, 2016 edition by Cynthia Reason and check out the Fresh Air Finder Map..
Air Pollution - City Wide Map
Noise Pollution - Aircraft
Noise Pollution - Aircraft
Webtrak is an online tool which provides real-time and historical flight path data so you can investigate aircraft operations.
Webtrak makes it easier for you to see what plane is overhead and to submit a noise complaint.

You could also plug in your home or office address and see if airplanes are in your flight path. This is a very cool site - I
plugged in my home address and it showed me a plane flying near my house in real time. You can even type in a specific
day and time to see what planes were flying overhead at that time.

I ran my mouse over the plane and it showed me the height or altitude of the plane as well as the origin of the flight, the
type of plane and destination...click on
Webtrak to go to the site. Be sure to read the left side tab at the top "Start Here"
and the tab "Flights and Complaints" will allow you to enter your address. Be sure to investigate all the tabs and sections
there's a lot you can do with this site.

Aircraft noise has been a long standing issue in Toronto as well as most major and inter-city airports. As the population
increases in any given city the air traffic tends to increase. Most people know that aircraft can produce very loud noises,
but living in the flight path to a major airport may produce loud noises over a period of time which can have a more
Typically noise is measured in Decibels (db) but how do you measure aircraft noise, over a period of time, type of aircraft,
night or day operation, weight etc. etc....many variables have gone into finding a
formula to come up with the effective
perceived noise level. The NEF or Noise Exposure Forecast was introduced by
Transport Canada to provide a guide and
a contour map was designed to visually identify the NEF rating around Toronto International Airport.

contour map will give you the NEF rating - look very closely at the black lines and you will see a NEF Rating -
(25,30,35,40). The contour map doesn't give you the community response (Basically at what number will the community
respond, such as noise complaints based on the individual number) the higher the number the louder the noise.
This is
important if you want to buy a house in an area defined by the contour map.

So I found Transport Canada's Definition, scroll down to 4.8 Recommended Practices and review Table 1 - Community
Response Prediction.

1 (over 40 NEF) Repeated and vigorous individual complaints are likely. Concerted group and legal action might be

2 (35-40 NEF) Individual complaints may be vigorous. Possible group action and appeals to authorities.

3 (30-35 NEF) Sporadic to repeated individual complaints. Group action is possible.

4 (below 30 NEF) Sporadic complaints may occur. Noise may interfere occasionally with certain activities of the resident.

For more publications and links visit Toronto Pearson website
Toronto International Airport - Webtrak
Noise Pollution - Trains
Noise Pollution - Trains
If your thinking about buying a home or you already own a home near a railway line or yard there are some important CP
I also wanted to provide additional information and links, see below, which you may or may not find on CP and CN's
brochure and or web page. The Canadian Rail Atlas is very useful in zeroing on your actual community or street level and
identifying if a rail line is near by.

Canadian Rail Atlas - a
website with a detailed map that outlines almost 45,000 Kilometers of railway network in Canada
where you can view class 1, short-line, tourist, commuter and intercity passenger railways. Make sure you read the
MANUAL first its very helpful in understanding the full use of the map, or go directly to the MAP.

Rail and Reason - A community blog for people affected by railway noise pollution.

Railway Noise Measurement and Reporting Methodology - was prepared to guide railway companies, citizens, and to the
Guidelines (see Guidelines below), the Methodology sets out procedures for the assessment of noise levels from existing
rail installations and installations under construction. The Methodology may be used by the Agency in reviewing noise
assessment submissions provided in support of cases for adjudication

Guidelines for the Resolution of Complaints over Railway Noise and Vibration - The Guidelines set out the collaborative
measures that parties must follow before the Agency will investigate a complaint. They also set out the elements the
Agency will consider in determining whether a railway company is in compliance with the noise provisions of the CTA and
the process to be followed in filing a complaint and the information to be submitted

Transport Canada - Website outlining railway safety - Acts, Regulations, Rules, Standards etc.
Heat Recovery Ventilator - Internal
Heat Recovery Ventilator - Control Panel
Condensation on window and mold