Ian Goldman solved my HVAC problem rapidly and effectively. After multiple service calls from another firm, which sent technicians who changed the filter and left, Ian Goldman methodically isolated the problem and solved it. An apartment that was boiling at over 80 degrees was soon cool and livable and 70 degrees. Ian Goldman is also polite, knowledgeable, and reasonably priced. He even called back to double check that everything was ok. I would not use anybody else from now on for HVAC systems.