is the square footage to be calculated to purchase the right size that of the attic or of the whole house?
1463067
The Natural Light Solar Attic Fan roof mounted recommended capacities are: 10 watt: up to 850 Cubic Feet per Minute recommended for up to 1200 Square Foot attic areas, 20 watt: up to 1275 CFM up to 2000 Sq. Ft. attic areas, 30 watt: up to 1550 CFM up to 2500 Sq. Ft. attic areas, 50 watt model: up to 1900 CFM up to 3100 Sq. Ft. attic areas.
535509
In response to your question, this item is generally 8 inches by 8.5 inches if I remember correctly. In either unit that you decide to buy keep in mind as I learned these items are meant to be installed from the attic for a perfect fit. My attic was inaccessible; in my case, I went in through the bathroom. I did have to make some incisions for the tabs to slide in but they were not visible once the outer circular cover is installed. I must want you. Be prepared for the unexpected. In my case my electrical wires were too short and there was not exhaust hose leading outside of the attic. You only need this hose if you will be using it to extract moisture. In response to your question, this item is generally 8 inches by 8.5 inches if I remember correctly. In either unit that you decide to buy keep in mind as I learned these items are meant to be installed from the attic for a perfect fit. My attic was inaccessible; in my case, I went in through the bathroom. I did have to make some incisions for the tabs to slide in but they were not visible once the outer circular cover is installed. I must want you. Be prepared for the unexpected. In my case my electrical wires were too short and there was not exhaust hose leading outside of the attic. You... » Read More In response to your question, this item is generally 8 inches by 8.5 inches if I remember correctly. In either unit that you decide to buy keep in mind as I learned these items are meant to be installed from the attic for a perfect fit. My attic was inaccessible; in my case, I went in through the bathroom. I did have to make some incisions for the tabs to slide in but they were not visible once the outer circular cover is installed. I must want you. Be prepared for the unexpected. In my case my electrical wires were too short and there was not exhaust hose leading outside of the attic. You only need this hose if you will be using it to extract moisture. « Show Less
1415896
You can either purchase one unit by itself for a certain price or purchase a 2 count which will represent two of these units or you can purchase four of the units. The size of unit does not change just the number of these that you wish to purchase for different areas of your home. I hope this helps!
491472
Yes, I would recommend 2. We have a neighbor who has a house similar in size and two are adequate for this square footage
674571
Good afternoon,One test will cover approximately 2000 square foot. If your home is larger than that I would recommend sampling one on each level. If it's smaller one near the stairwell will work. Please let me know if I can assist with anything additional.Regards,Rebekah ArmentroutHome Air Check
676188
probably, but i would measure the closed dimensions and open dimensions of the old units, before purchase
2015625
I choose the 800 because of the size of our family room and the ceiling height. The 800 is better suited to a larger room and vaulted ceilings.
778878
I don't believe square footage matters. It's the amount of air that flows through your system. Almost all residential systems are within the limits.
14019
The half pint should be sufficient. I covered a little more than that square footage on a few medium-sized cabinets (two coats) and used about 1/3 of a pint.
541804
No. If you are putting it in the attic, you should get the indoor model, and install according to the instructions.
2183021
1 square foot. The piece is made up of pieces that are 1"x2". Measure your area in inches (height times width and then divide by 144). This will give you the proper amount of pieces to buy but always round up and get an extra piece.
1131558
Assuming the attic is insulated pretty well & no taller than 8 ft., I would estimate each unit is good for about 300 sq. ft. Think in terms of the amount of heat coming off a 100 watt light bulb. It isn't hot but does provide a small steady source of heat. If you lose heat from a draft or uninsulated windows, then you will need more units. For the amount of space you have, I would look for an option that has a fan. 2,000 sq ft with an 8 ft. ceiling is 16,000 cubic feet to heat. That sounds unrealistic for a passive unit that relies on natural convection.
1577851
Depends on the size of area. I would say 8x10 ft room then 1 is good. Bigger then that get 2
270790
You have to calculate your total square footage. Each tile covers 1 square foot. Then you can calculate how many boxes you will need.
180957
Order by the model, or are asking about the square footage cleaned by the unit?
436526
First, the product you're referring to is a bit different than what I used. Second, the box says 250 sq ft...I'd measure my garage to see how large it is.
491475
Judgement call; more always better but hard to justify the cost. I think I'd do just one and make sure the attic is well vented otherwise to move air easily. And adjust the angle appropriately for summer at your latitude (about 10 degrees off of flat horizontal - that is, tilt it just a little bit due south).