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Question DetailsAsked on 12/22/2016

WHAT SHOULD i EXPECT TO PAY FOR BRAND NEW HVAC FOR ONE STORY 300 SQ FT HOUSE. NEW EVERYTHING.

tHIS IS BEING INSTALLED IN A HOUSE THAT HAS BE STRIPPED TO THE STUDS, SO EASY TO INSTALL VENTING, ETC.

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You can find a lot of previous questions with answers on HVAC units and ballpark costs in the Home > HVAC link in Browse Projects, at lower left. Nothing there anywhere near as small as 300SF as I recall - but if you meant 3000SF as I suspect, lots of questions on that size unit there. Most of the questions deal with the unit cost only - minisplit costs as described in the responses, but if talking ducted can be another $1000-2000 commonly for flexible ducting (yuck), or $1500-3000 more likely for conventional metal ducting (for 2000-3000 SF range house - probablymore like $500-1000 max for ducting for 300SF house. Depending a lot on the house configuration of course, because a compact 2-story house is going to be a lot cheaper to duct than a slab-on-grade single story rambler or hacienda or such that is all spread out. Also, whether or not you have open crawlspace or basement to run the ducting in or if it all has to be concealed in floors makes a significant difference in ducting cost too.


My recommendation - avoid putting the unit or ducting in the attic if possible.


For 300SF house - if that is really what you mean, and assuming you are not in a terribly hot/humid locale like the deep southern Florida or swampy deep south states, I would normally recommend a through-wall unit similar to (but a bit more robust than) a window air conditioner - probably about $1000-1500 installed cost. For extreme A/C area, or if you want multiple points of distribution in the house, then a ductless mini-split would normally be recommended, though since your house will be stripped to the studs a ducted unit could also be used - probably about $2000-4000 range installed for normal efficiency unit.


For that small a house, unless in a pretty cold environment in the winter, you might also want to look at a heat pump instead - more like $2500-4000 installed probably, but provides heating and cooling in one unit and with far greater efficiency than a normal furnace on the heating side when the heat pump only is providing the heat. However, for outdoor temps below about 30-40 degrees you generally have to have a supplemental gas or electric heating unit in the air handler because they cannot extract heat efficiently from air colder than that.


I would get bids from several vendors, and leave the option open for whatever types of units you find acceptable (through-wall, ducted, mini-split, etc) and allow them to bid more than one option, then select from the choices. Of course, if you are able to decide up-front what type of unit you want (in an initial pre-bidding discussion with the potential bidders), then having them all bid the same capacity unit ofthe same operating type will result in more consistent bids and makie it a lot easier for you to compare the different bids against each other - apples to apples, so to speak.

Answered 1 year ago by LCD




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