Air Quality Dunrite

I asked Air Quality to give us an estimate for the replacement of a noisy boiler pump in March 2010. They said because we have their Silver club plan the cost would be $548 + tax. As we just moved in the house we didn't get a chance to replace the pump then and then the boiler was off during summer. This week they are quoting us $780 + tax for the replacement of the same pump. When I asked why the price is higher by 40% they said because of HST, when I indicated in March the price was $548 + tax, they said the price of the pump has gone up since then. They could not explain why it went up by 40% in just a few months.