Rob Will
01-13-2008, 1:32 PM
In Phil Thien's excellent ongoing thread about measuring shop air quality, the question came up about using a forced air furnace to clean shop air. This is something that I would like to discuss further but I don't want to hijack Phil's thread so here's a new one.
Al Willits brings up a very good point in the other thread:
"Just a note for those of you who think your furnace is supposed to keep your air clean too, be careful, as furnace filters were designed to keep furnaces clean...period.
Furnace & A/C units are designed to work with a certain air flow, the company I work for makes a tidy profit from replacing heat exchangers and A/C units from units being misused with too restrictive a filter.
Make sure your filters will pass the required amount of air."
Al[/quote]
Thanks for the reminder Al.
Just to be sure, I may install an extra Dwyer gauge on the filter plenum.
What would be a typical negative pressure (inches of H2O) between the filters and blower?.... 0.1"? .... 0.5"?
I really like using my HVAC for air cleaning and will do whatever it takes to protect the furnace (Lennox Pulse furnace 80K BTU / 3 ton AC). This includes installing multiple filters.
Anybody had any experiences (good or bad) with using the HVAC for dust control?
BTW: That particulate counting meter in Phil's thread sure looks interesting:cool:.
http://www.sawmillcreek.org/showthread.php?t=73486
Thanks for your input,
Rob
Al Willits brings up a very good point in the other thread:
"Just a note for those of you who think your furnace is supposed to keep your air clean too, be careful, as furnace filters were designed to keep furnaces clean...period.
Furnace & A/C units are designed to work with a certain air flow, the company I work for makes a tidy profit from replacing heat exchangers and A/C units from units being misused with too restrictive a filter.
Make sure your filters will pass the required amount of air."
Al[/quote]
Thanks for the reminder Al.
Just to be sure, I may install an extra Dwyer gauge on the filter plenum.
What would be a typical negative pressure (inches of H2O) between the filters and blower?.... 0.1"? .... 0.5"?
I really like using my HVAC for air cleaning and will do whatever it takes to protect the furnace (Lennox Pulse furnace 80K BTU / 3 ton AC). This includes installing multiple filters.
Anybody had any experiences (good or bad) with using the HVAC for dust control?
BTW: That particulate counting meter in Phil's thread sure looks interesting:cool:.
http://www.sawmillcreek.org/showthread.php?t=73486
Thanks for your input,
Rob