I am very new to this world. After the furnace was installed, I felt very dry and very hot air. That is why I have started researching the problem and figured out that the dealer made a huge mistake. They lowered the speed of the blower to medium high; based on the product spec, it is still around 1200 cfm. YOu are right; the air is noisy, but only rooms that are close to the furnace noisy. So, is it okay? Or, will it damage the duct system eventually? Believe me, Georgia does not have a good building code, which encourages builders build houses so quickly. Most likely, the duct system is not that good. Our house is abou 2300 sq. It has an adequate insulation. When I ran a sizing estimator on the Internet, it showed between 70KBTU and 80KBTU. But the output of the furnaces I have are 80 percent of two 66KBTU, which is 105K. So, when the owner of the dealer comes out do the heat load calc, can it be like 105k at the highest? What variation can I expect? 800cfm blower is okay with 2ton heat pump? Any problem? They fooled me once. I don't want them to fool me again.

After wandering onto this site by accident, I have become more than a little amused. In particular, concerning the supposed low cost of operating a professional heating and air-conditioning company. I have firsthand knowledge of those costs. My small business has 5 employees. In FY06, our cost of doing business was over $340,000.00. That includes wages, office and shop costs, insurance (liability, theft, workmans comp, health and auto), automotive maintenance and repair, employee retirement, tools, licensing and permits, etc. That does not include the actual cost of goods sold. Any profit that is earned beyond that amount is at least deserved. Most companies extend a one year labor warranty on the equipment they install. If there is a warranty repair, they are not compensated by the manufacturer for their time. This is a cost of doing business that most people do not consider. If a thunderstorm comes by tonight, and knocks out a compressor, we will replace it tomorrow if the year warranty is still in effect. No, that shouldnÂt be covered but we are noted for going above and beyond. It has built an incredibly loyal customer base. Three of our six vehicles are specialty utility vehicles. These are not inexpensive to purchase, operate, maintain or repair. Operation of these vehicles with gas prices at $2.50 a gallon average $.79 per mile. I am certainly not complaining about my job or my business. I make a good living and very much enjoy what I do. However, since shots have been fired, I feel compelled to fire back. Though we purposefully avoid dealing in equipment as low in quality as the unit described, I have read through a GMC 90+ Installation manual before. Reading the manufacturerÂs written instructions are not an option for this engineer. Whoever heard of an engineer that did not read the instructions? All furnace manufacturers are very specific about the installation of the exhaust vent. Regarding length, size, termination and even number of 90 and 45 degree turns allowed. Additionally on the vent, I have only seen long sweep elbows specified. The point of the exhaust vent termination is critical as are the instructions for preparing the termination area. If the directions are not followed regarding termination, you have a high probability of damaging your home. As mentioned before, we do not install GMC equipment. However, I cannot remember reading any furnace installation instructions that did not specify using a manometer for checking and setting proper gas pressure/flow. The equipment we install is very specific about transitioning mismatched sizes of furnace and indoor coil. It is obvious sir; you either did not understand or did not thoroughly read the instructions. My impression of an engineer that is earning in the mid 80Âs is they must be an underachieving, 9-5 cubicle dweller. I have been a registered PE since 1989. I think you must drive the choo choo. We are definitely not the same kind of engineer. To my knowledge, all HVAC equipment manufacturers warranties are void if the equipment is not installed by a qualified, trained HVAC professional. Your plumber looking at it after the fact does not qualify. However, manufacturers are too lenient about warranties. They will probably give you the parts that might be destroyed due to improper gas flow or improper exhaust venting. However, if something serious happens, like burning down your home or soot damage, your insurance company will want a licensed insured company to sue. Since there is not one, they just will deny the claim. My free advice here is to find an exceptionally qualified company to double check your installation. I am sure they will charge beyond what you think is "reasonable". However, you have stepped into an abyss that is beyond your comprehension.

Often "Factory Authorized or Factory Certified" means nothing more than someone from the company sat through a 2 hour training course or watched a training video that told them what they already knew. In some cases, it means nothing more than the factory authorized/certified the dealer to sell their products based on the fact he was able to pay for them. The only certification that means anything IMO is the AAMA Installation Masters Certification. But, even that doesn't guarantee a good install nor does it mean that someone who isn't certified won't do an excellent job. It always comes down to the same thing, get recent references and call them. If you can, go by the job and see for yourself if it looks like quality work. Don't rely on certificates or time in business to be too much of an influence. I don't mean ignore them, but don't assign them too much weight. I'd rather have an enthusiastic installer with a great work ethic and a ton of experience who just started his own business working on my house than an old established company who views me as just another customer.

So far HVAC dual fuel system has been installed 32 hrs. And it has not run yet. Weather in Atlanta warm for Feb and at 70 degrees there is no need for heating or cooling. Right now I am just waiting to test it out ....one way or another. Installer called and said they would be happy to switch it out...or I can keep the heat pump that was erroneously installed. Klem1: the filters were 5 inch pleated ones almost identical to my Aprilaire ones but they said theirs were better. BTW....had just signed up for a 2 year contract for gas at 36 cents a therm. And now I have a heat pump....lol! I will most likely keep the pump....had always been interested in dual fuel......but past experiences with heat pumps kept popping up in my mind. Thanks Weedy, Tigerdunes, and Klem1 for your positive input re. the incorrect equipment that was installed. Pretty sure it will be a "keeper".