My Landlord kindly installed a new , but used , gas furnace in our old farm house. The old one was working but getting old. The new one is actually a used one but supposedly more efficient. It has been installed two days now and we notice that most rooms are colder than they were with the old furnace. The amount of forced air seems MUCH higher but the air coming out it cooler. For some odd reason the rooms that were always warm before are now cooler (like the kitchen) and the rooms that were colder are warmer (living room). The bedrooms are cooler too, I also notice that the amount of air coming in to the bedrooms is VERY low, hardly noticible, downstairs its like a wind storm!