13.1 - AIR QUALITY IMPROVEMENT IN THE DWELLING
  Number of households by region
Canada Atlantic Quebec Ontario
Methods used to improve air quality of dwelling:
 
Opened windows more
Yes 12,745,964 A 919,132 A 3,191,659 A 4,745,697 A
No 1,218,879 A 76,017 A 348,506 A 423,113 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
Floor/ceiling fan
Yes 8,646,018 A 703,717 A 1,922,803 A 3,437,029 A
No 5,318,825 A 291,432 A 1,617,362 A 1,731,782 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
Air conditioner
Yes 2,165,089 A 130,454 A 550,189 A 972,779 A
No 11,799,755 A 864,695 A 2,989,976 A 4,196,032 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
Used a dehumidifier
Yes 4,541,570 A 502,565 A 1,310,991 A 2,033,576 A
No 9,423,274 A 492,584 A 2,229,174 A 3,135,234 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
Used a humidifier
Yes 3,407,141 A 136,543 A 459,914 A 1,771,184 A
No 10,557,703 A 858,606 A 3,080,252 A 3,397,626 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
Non-ionizing air cleaning system used
Yes 1,868,779 A 211,682 A 551,421 A 638,356 A
No 12,096,064 A 783,467 A 2,988,745 A 4,530,455 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
High quality filter used in furnace
Yes 3,528,281 A 56,274 M 205,826 A 2,016,075 A
No 10,436,563 A 938,875 A 3,334,340 A 3,152,736 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
Furnace fan/heat recovery ventilation system
Yes 4,033,013 A 271,059 A 691,736 A 1,896,615 A
No 9,931,831 A 724,090 A 2,848,429 A 3,272,196 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
Used air fresheners
Yes 4,302,827 A 308,226 A 985,075 A 1,860,098 A
No 9,662,017 A 686,923 A 2,555,090 A 3,308,713 A
Don't know - U - U - U - U
Not stated 203,090 M     - U - U
Frequency windows opened during winter
Every day 3,760,326 A 168,126 A 832,328 A 1,286,418 A
At least once a week 3,791,575 A 240,578 A 1,079,802 A 1,551,091 A
A few times during the season 3,457,971 A 336,228 A 823,808 A 1,340,634 A
Never 1,667,518 A 167,625 A 451,729 A 541,450 A
Valid skip 1,218,879 A 76,017 A 348,506 A 423,113 A
Don't know 36,949 M - U - U - U
Not stated 240,590 M - U - U - U
Frequency windows opened during summer
Every day 10,297,441 A 785,115 A 2,650,957 A 3,418,133 A
At least once a week 1,716,502 A 89,995 A 319,109 A 1,009,329 A
A few times during the season 536,637 A 23,596 M 183,559 M 223,887 A
Never 112,384 M - U - U 61,704 M
Valid skip 1,218,879 A 76,017 A 348,506 A 423,113 A
Don't know 44,178 M - U - U - U
Not stated 247,786 M - U - U - U

Legend:

The letter beside each estimate classifies its quality as follows: A–Acceptable, M–Use with caution, U–Too unreliable to be published.

Notes:

Valid skips are households that have answered that they do not take any measures to improve the quality of air in their dwellings.
Due to rounding, the numbers may not add up and may differ slightly among tables.

Source:

2015 Survey of Household Energy Use