Mine is heating/AC in one unit, installed on the roof. Is this s

Almost all of my rental houses have this kind. One contractor gives me a quote of $3600, but he has hard time providing receipt and wanrranty information. He said that he'll take care of it if there is any problem. Should I be concerned? Another quote is $4500. The price difference is significant, hard for me to turn down $3600 and go for $4500, especially when it's x4 (nay need to replace 4 of them!)

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• Is this so-called HVAC? -colorpurple- ♀ (0 bytes) () 07/11/2011 postreply 08:47:35

• Heating Ventilation and Air Conditioning,你的LOCATION? -出租房很烦- ♂ (0 bytes) () 07/11/2011 postreply 08:52:30

• 你的LOCATION? -出租房很烦- ♂ (0 bytes) () 07/11/2011 postreply 08:52:52

• Heat pump. No, don't trust any individuals. -any_more_left- ♂ (0 bytes) () 07/11/2011 postreply 09:43:02