Ductless? HVAC plans take up a lot of closets in my old house
rjlyders
10 years ago
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roadking
10 years agoRelated Discussions
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Comments (3)I find it hard to believe you need a 2 ton condenser to cool two bedrooms and a bathroom. You need to find a contractor who will do a proper load calculation. I would think 1 ton would be sufficient. You could take the money saved on the proper sized unit and put it towards fixing the duct work and moving the condenser. The Mitsubishi mini splits could also work well since you only have two rooms. My preference would be to fix the ducts and get the proper sized condenser and air handler. I am not sure I would like the look of ceiling mounted cassettes....See MoreNew house - extreme air suction in HVAC Closet
Comments (21)Wow! I never would have guessed this. One can only imagine why the HVAC contractor did it this way. Typically this is how fur down unit would be installed. They install the fur down unit inside the plenum or return if you will. However, this unit is not a fur down unit. It could work, but noise will probably be a factor to some degree because it appears to me the return is not large enough. So why did they do this? Maybe there were no better options? I noticed from the original post there is an optional tray ceilings. Do you have the tray ceilings? If you do have the tray ceilings an attic install would be more difficult to put hvac in attic. The closet where this sits is off to the far side of the home maybe for whatever reason there is not enough room to run a return back up thru the ceiling in this closet due to roof joists. Looking at the picture they put a small return grill in that closet off center. The contractor may have been forced to do it that way... no room equals no room. Architects really mess things up by not thinking. It can work this way, but it's not ideal... because air is stupid. When that unit kicks on it will draw air from where ever it can. Thru cracks and crevices in that door leading out. It's common knowledge that doors leak. If you put a louver on that door, then there is no filtered protection to that coil (unless they put a filter at the coil it's a poor way to do it. Plus then you create a wind tunnel, every time the unit kicks on there's this rush of air going to the laundry closet and on into the HVAC closet. What makes it even worse is the garage directly behind the unit. If there are cracks at the base of the wall / thru electrical plugs you have the potential of sucking carbon monoxide into the home if a vehicle is running. It would be prudent to check this. The filter you show out in the hall is big, the one in the closet is small it is likely these two are connected... that is your return. Problem is the return in the room of the unit is in the shape of a funnel (goose neck) the system will never have enough air because of that. The contractor either messed up or the architect or a combination of the two. Certainly they will tell you any alterations will void the warranty, because many in this business do not understand simple things let alone the more complex things like the design of your system. A year goes by pretty fast though, if you still have too much noise I would keep complaining. The noise tells you a problem exists, don't let them tell you otherwise....See MoreIs my HVAC high limit switch working or not? Two HVAC pros said it is.
Comments (25)WHAT IS A HIGH LIMIT SWITCH? https://www.newcentralairconditioner.com/ The high limit switch in your gas furnace is a small part with two very important jobs. This switch plays a role in the normal operation of your furnace. Turning the fan motor on and off is the high limit switch’s main job. This is the role it plays in every cycle of your furnace’s normal operation. But that’s not the only thing that the high limit switch does. It’s also safety device that helps prevent your furnace from overheating. The high limit switch consists of a long temperature-sensing probe attached to a metal mounting plate. From the mounting plate, the switch is wired to the blower fan motor and to the gas valve. The switch is generally located just past the heat exchanger. This is so that it can detect the temperature of the supply air. In other words, the air that’s about to be blown into your home....See MoreHVAC Dilemma! i want some help in regards to my HVAC system . thank y
Comments (11)Sizing can be less of an issue when you have multiple units. Because each unit is controlled independently, provided of course the unit itself is not over sized for the area in which it serves resulting in excessive short cycling. In your case 3 ton plus 2 ton isn't necessarily equal to 5 tons of cooling... unless you drive those thermostats really low. By having two systems with total capacity of 5 tons (which, most of the time this would be oversized for a 1700 - 1800 sq ft structure) has a few advantages. 1. You have the ability to use one system only during low heat days or set the opposing unit higher. The unit set higher only runs if load conditions warrant.... meaning if it's not hot, the thermostat controlling the unit does not call... the unit can not run without a call... 2. Utility bills can be much less... because you rarely use both systems at the same time. You run the bedroom system when you sleep, the other when you're awake. If you have a home office in one the bedrooms you may need to rethink things a bit. 3. Extra capacity for when it's hot out. When it's hot you have the capacity to cool the home. (even while entertaining guests --- additional people add heat) Remember heat waves come, heat waves go... a so call 'properly sized' AC system is essentially properly sized roughly 10% of the time... especially if that system is a single speed AC system. Alot of people I come across like to sleep cool. So for that reason I doubt I would change the configuration of the space. Once you realize what you have, the choices you make are mostly budget type concerns. Essentially a set up like this runs like a 2 stage system. This kind of subject is above the pay grade of many... choose your contractor wisely. I service the Katy, Texas area....See Moreionized_gw
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