Is my a/c unit too small for my house?
stella_2006
17 years ago
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bob_brown
17 years agoRelated Discussions
Updating the heating and A/C in my home
Comments (3)I upgraded from a builders grade system that was on the bottom tier of builders grade to a 15 seer 10hspf Ruud system that is really great in comparison. I did take advantage of the tax incentive and also a utility rebate in the process. The real motivator for me was the company I work for had a program that was zero interest for up to five years and was going to be dropped. I am saving money on electricity and the comfort level is a lot better. I would have saved more money on bills if I would have went further with sealing and insulating and plan to later. I just could not pass up the zero interest to get rid of the no name unmatched system. I did put a honeywell visionpro stat on the old system with outdoor temp sensing and figured out how to stage the strips and lockout the heat pump and or strips which saved a huge amount of electricity and made the comfort level 100% better. I also went from R13 to probably R30-38 in the attic and did a ton of sealing in the basement before upgrading the hvac. I have to admit that a mediocre system with a GOOD stat with outdoor sensing and staging along with some sealing and insulating will go a very long way. I got the stat on Ebay new for 50 bucks and outdoor sensor for 12 which is cheaper than most any stat at home depot or lowes. For those thinking of a stat upgrade... there are new 120.00+ stats that can be had for half price or less. I don't regret my new system... I guess I just didn't see the drop in usage that I figured I would. I spent 65 or so on the stat setup.... 400.00 or so in attic insulation and probably 300.00 in duct mastic, foam, caulk and recessed light sealed trim rings with the old system and notice a HUGE difference in savings. I spent less than 1k. The new system was approaching 7k and didn't see near the savings. The moral of this story is really think before you jump. A good majority of people out there could probably invest 1k into sealing and insulating and get it back in a few years. Skipping the initial sealing and insulating and dropping 5-7k on a new system might take a while....See MoreIs my A/C too big
Comments (25)so my installer came to do a duct test and claims "your system is powerful and it is cooling fine" so practically he is telling me that my system is powerful and cools quickly as if that is a good . I am pissed the most important part of his visit and he tells me my system cools fine with a short run. I am not that stupid. practically he is just saying that 10 min is how long a system should run to do both of its jobs(cool and dehumidify) is this for real. even not at design temps the system should run longer. He apparently claims he checked the duct work. so upset right now.I am basically crying. 10 min or less run= high humidity PERIOD ! This installer should just quit his job! so my day is wasted thanks to this installer. even my previous unit wasn't giving me this issue when it was installed. I was looking foward to comming to a cool house and now it still feels like a swamp in here...See MoreMini split a/c for my old house?
Comments (10)What kind of water heater do you have? If your boiler is more efficient than your water heater, you might consider moving your hot water source to an indirect tank fired by your boiler.. I think that you missed my point about heating performance of mini splits in cold climates. Some models retain their performance to a much lower outdoor temp than others. One example are the Mitsubishi Hyper Heat models. The ones you have your eyes on may not do as well, but I don't know for sure because I am not familiar with Pioneer. Yes, unless your gas-fired heat is horribly inefficient, there is no way you should be able to heat with resistance heat or heat pumps for less coin. I think that you need to check your calculations. I just looked up that 1 therm equals 29 kWh. I assume that is 100% of the energy in the therm. With your boiler, we have to guess at an efficiency. If we say 80% you get 23 kWh out of a therm. That says that for the same amount of heat, you pay 5.35 cents in gas vs 10.1 cents for electricity. (Frankly, I am surprised that the difference is not greater. Maybe I made a mistake.) As I wrote previously, there may be some savings in spot heating with electric spot heaters, but not heating most of the home that way. You'd have to cut your heat loss by partially heating the home to nearly half. For a heat pump at those fuel costs, it might be worthwhile. If your window units keep you comfortable enough, you will likely be happy with the cooling performance of mini splits. The good ones are good at humidity control, but you need to have variable speed compressors and blowers for that. They do entail considerably more maintenance than a central air system. For heating, you just have to crunch some numbers to see if they are better than your hydronic system. Keep in mind that raw fuel (electricity) efficiency is only one factor. Lifetime costs of the equipment should be factored in as well. A bunch of mini splits is a lot more complex a system than a simple boiler and a circulator pump....See MoreIs my kitchen too small?
Comments (18)Having just read this thread I see a little disconnect between what is being suggested and what the OP wants. She needs/wants max room for large get togethers for up to 20 odd people simultaneously so that means squeezing as much possible "people" /floor space out of the kitchen. They are not gourmet cooks and don't require many of the elements others do. She will get MORE storage out of this plan than her current layout and she's cool with some less than ideal results such as lack of landing space etc....which apparently she doesn't have now. (2) She loves the amount of space allotted to the other living spaces and doesn't care that the kitchen is small in relation to them. (3) From what I've read it seems they've really investigated quite a few approaches from pros and for one reason or another they didn't work....cost in many cases. It's not as if she's unaware of many of the possibilities. (4) It seems clear that although the new plan isn't that great in many peoples eyes, it's MUCH better than they currently have. :) They're accustomed to less-than-perfection and that's fine with them. People interaction is a priority over kitchen elements. Now OP/Leslie? With all of that said? This is my concern from your statement that storage space is less important than floor space: "not enough floorspace and room for people to operate without bumping." There's only 1 area like that now and I fear you might be creating multiples with this plan! The space allotted to the banquette and table? It needs to be drawn/scaled in. Even if the table is small (less than 24" wide) there will be seating for only 2-3 on the bench as there's no room for chairs there with the island so close to it. It needs to be drawn EXACTLY as it would be with people sitting on the bench. Space between bench and table/peoples legs taken into account is what I mean...don't cheat. :) Without chairs there's a max of 36" between table/island it seems and even less in reality probably....that's what you hate now and that doesn't even take into account when the DW is open or people are working at the island. You're "designing by the inch" here and don't think every one doesn't count. I've changed kitchen layouts, moved plumbing for just an additional inch or 2 to allow something to move location; it's critical you nail this. The 36" roll out pantry shelves on the blank wall. I don't know how deep this is supposed to be but again...it's really tight with the island and banquette. You want roll outs which indicates at least 18"-24" deep...and you are RIGHT at 36" away from the island if that's the case. Open the cabinet door and it's worse. I've done some 36" vs 42" distances because I know it's workable in some areas but I would never create so many of them as might happen here....particularly when it's the "bumping into people" thing you hate. Having designed my share of kitchens I'm aware of the NKBA recommendation. I'm also aware that we're fully capable of taking stuff in/out of the fridge and stretching our arm to place it on a nearby counter several feet away if they're isn't a landing space! Refrigerators not on a counter run? Many of us probably grew up in kitchens like that....and it was fine. Not as pretty or convenient but it works...and think of the additional steps per day! :) Many meals are cooked, gatherings celebrated in less than professionally designed kitchens. I was happiest cooking in my tiny, cobbled together antique kitchen with it's 6sf of counter space at our ranch getaway. I had a big, new kitchen at our fulltime home but but I actually enjoyed cooking more at the former. I DO think you can do this on $30-40K; I've done guts of much larger kitchens than yours on that. And that was for semi-custom cabs. IKEA will probably come in cheaper than your other quotes. Is the banquette/36"tall pantry figured into the cab quote? Anyways....I wanted to jump in with some info and just say that i think you REALLY need to figure this out this to the nth degree, BY THE INCH and not worry about island colors quite yet. :) Yes to micro over range when space is tight. Oh, Lisa's plan above is a good one albeit it loses some seating but is all the banquette /table space taken up worth it for just 2-3 people sitting there? (And again it's really far to close to the island) I know windows are very expensive to change out...that might be a budget breaker. But aside from a better designed kitchen overall it is also has more "floor space" which you said is a priority. You might check into window replacements before proceeding if you haven't already....See Moredadoes
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