Hello everyone, here is my situation. I bought a house in late 2011 and it had an older Lennox sig. series Pure Air already installed. We haven't put a new filter or bulbs or anything in it since we lived here. I just ordered and received the replacement kit with the 4 tubes, the metal/ titanium filter and the 4" thick MERV 10 filter. We don't really have any allergy issues I know of, or mold situation, again, "that I know of", or any weird odors in our house. As soon as we bought it we put a new furnace/A/C coil in as the existing one had a cracked exchanger, and the new one is a Maytag 904641L. I'm not sure if that is the right number, but I don't see much info on it.
Anyhow, what I was wondering is, if I install the kit and plug the unit in, am I filtering for no reason? It was a bit over $200.00 for the replacement kit, and I only bought it because my wife wanted to try the unit out. Up till now we have had probably a mostly clogged filter in it, and it has been un-plugged.
The advise I got from a local HVAC guy over the phone was to install the kit and run our furnace fan in manual. He said it is a great unit, and we should change all the components yearly. I was thinking about running it off of a relay so it only turned on when the blower fan was on. I was also wondering if I installed a water tube gauge before and after the filter, if I could go by the differential in HG instead of just changing it by an arbitrary time frame, as the filter itself is rather spendy. any one have any idea what a good HG number would be to go by as a signifier that my filter has reached a point that it should be replaced? Or any opinions on the situation in general? Such as fan in manual vs. the relay idea to save energy? Or whether I should just use it as a normal filter after the bulbs, and metal/ titanium part go out of date?
Thank you in advance for any insights,
P.S., My guess as to why it is in the house to begin with, is that a previous owner had a dark room in the basement, and I figure it was to deal with the chemical odors from that.