Search found 19 matches

by JTRFLASH
Tue Mar 05, 2013 1:25 pm
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

Hi freon, still deciding whether to order the grilles and filters, a bit of a pain ordering them from Canada, a few unknowns it will be about $300. Also I have come up with a simple circuit for the HRV to interlock with the furnace at the low speed. The probelm is the blower motor can only have one ...
by JTRFLASH
Fri Mar 01, 2013 12:34 pm
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

Thanks for everything. So I have had a discussion with the manufacture technical support, they have helped me somewhat in saying I have a restriction (no kidding), I asked well can you tell me where the restriction is based upon my tests. They sent me a picture of a manometer, one end on the return ...
by JTRFLASH
Wed Feb 20, 2013 11:01 am
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

HI, ok interesting. I measured my present returns and they are all 14 x 10, between the studs is the plenum, but I thought I would expand to 14 x 20 grilles, I can expand upward and remove the drywall for the larger opening. There is only 14.5 inches between studs on 16 inch centres. The grilles I l...
by JTRFLASH
Wed Feb 20, 2013 10:22 am
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

Hi Freon, I will look for them also, I found a place called HVAC something. 14 x 20 grlles are about $22 each I would need 6, they are called TRUaire 190s, also I found the MBR 600 - MERV 8 filtes for the grilles. They will delever to Canada, perhaps the place you mention I can purchase the filters ...
by JTRFLASH
Thu Feb 14, 2013 12:18 pm
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

Thanks again, MERV 8 it is.

Funny I notice that a reply I sent to you is missing, I wonder if others have not be sent also.

Did you see the one at the end asking you for recommendations on filter grill vendors.
by JTRFLASH
Thu Feb 14, 2013 10:43 am
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

ok I think I got it.

By increasing the area of filtration you have reduced the friction and than the air can move more freely. I had it reversed thinking by adding more filtration I am reducing flow, this is all very interesting.

Am I on the right track now.
by JTRFLASH
Tue Feb 12, 2013 7:58 pm
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

HI Freon, ok I have looked around but I don't understand what the differnce would be where the filtration is located in the system, whether at the furnace or at the grills does it still not give the same restriction. When I think about it if I had 6 grills with 6 filters that would that be a lot mor...
by JTRFLASH
Tue Feb 12, 2013 10:37 am
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

Hi Freon, just to add, I didn't understand what you meant by installing a filter in the return ducts. In Ontario Canada I have never seen return grills installed to accomodate a filter. Our return grills are permanently screwed into the studs and a filter of any type cannot be added, well not easily...
by JTRFLASH
Mon Feb 11, 2013 9:27 pm
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

Update - I was wrong about the filter, it is a lot better than I thought. It is a 3M Filtrate Alergen, an MBR rating of 1500 which is apparenty equivelent to a MERV 12. Is that too much filter? I believe if I go to an MBR 1000 that is equiv to a MERV 8. I have UV lamps in the ducts so perhaps MBR 15...
by JTRFLASH
Mon Feb 11, 2013 12:46 pm
Forum: Residential
Topic: Blower Fans Speeds
Replies: 32
Views: 17819

- Blower Fans Speeds

Thanks Freon, it makes sense in what you say, run the furnace with the blower door off, removes any air restrictions on the return side, more air in then we would expect temp rise to be lower. I will try this tonight when I get home and yes easy to tape off the switch. If that is the case above, the...