On Oct 14/15 we had our furnace cleaned by Acumen. When there was an issue wih the CO2 reading being too high, the owner Chris Wood did not hesitate to immediately address the issue and came that day to solve the problem (though we are not using our furnace much yet). I appreciated his integrity in not attempting to sell me a new furnace, since mine is older. It was refreshing to have an honest dialogue with a contractor where no wool was pulled over my eyes (just because I am a woman) nor was there a move to upsell parts. GREAT JOB!