Where do you buy the Lennox Trimaster? Sharon I use Ironwood also and blades get dull fast.
Two places...Iturra Design, and Bandsawbladesdirect.com. Iturra does not have a website...you have to order by phone...904-642-2802. Their price is a little cheaper but you have to pay shipping. Bandsawbladesdirect is a little more, but free shipping. It was $169 at bandsawbladesdirect. With shipping it was about $156 from Iturra. I ordered it on a weekend when Iturra was closed so I used the website to order it.
This was for a half inch 3TPI 105" blade for a 14" bandsaw with 12" riser. My last one lasted almost two years. It was getting dull towards the end of that time, but was still giving me really smooth cuts. Then I let a log slip and fell into the moving blade and ruined it! I use the saw almost daily to cut up logs to make blanks for the blind center, so it got a lot of use.
By all means get the Iturra catalog. When I inherited my grandfather's 70 year old bandsaw, I was able to get all the pieces to refurb it from Iturra's catalog.