答复

1. GBA编辑
   马丁·霍拉迪（Martin Holladay）|2013年2月6日，上午08:05|＃1

   克里斯，
   我现在没有时间详细审查您的计划。我稍后会尝试回复。

   In the meantime, I'd like to provide advice to GBA readers who are thinking of designing a new home. Here's the advice: you shouldn't reach this stage in the design and framing of a new home without knowing where you are going to put your ducts. That decision needs to be made very early on.

2. GBA编辑
   马丁·霍拉迪（Martin Holladay）|Feb 08, 2013 07:38am|＃2

   克里斯，
   我更仔细地研究了计划，但是您提出的问题比在线回答更多的问题，尤其是您提供的有限信息。

   Some more comments:

   1.这是一栋昂贵的大房子。这样的项目需要一个良好的手动J计算（一个计算BTU/H中设计加热负荷的计算，并且比“ 3到4吨的任何地方”更精确。

   2. If you are distributing the heat and cooling with a forced-air system, your duct system needs to be designed using Manual D.

   3. The Manual J and Manual D work should have been completed before framing began.

   4.您是房主还是建筑商？谁负责供暖系统设计？

3. 
   克里斯·范·威尔根（Chris Van Wilgen）|May 01, 2013 02:10pm|＃3

   UPDATE 5/1/2013

   After too long of delay since the original post ( wedding/health/honeymoon) I have been attempting to get this project back on track. Fuel Source is propane, site positioning is south facing approx 195d for the rear walls with the large windows.

   Martin, yes I am the homeowner/GC for this project

   We have since had 4 HVAC contractors visit the project, each one has suggested varying proposals for a Hydro Air system, 3 of the 4 submitted bids. Each one said they would only relase their Manual J info after contract signing and not do Manual D unit after that with an install tech visit.

   4 proposals as follows:

   1 -A HI速度系统，带有2个冷凝器和一个位于车库中的一个锅炉 - 未提交出价，未回电话

   2- 2 Bids reccomend the WeilMclain Ultra 155 94% eff with 2 Trane condesing units sized @ 2ton and 3 ton, options for 16 or 13 SEER units. Boiler would be garage installed with one A/H in the mechnaical room and one above the second bedroom in the attic
   Zone 1
   机械室锅炉服务较低层(不是garage) and the upper level DR,K, pantry and smaller bath
   Zone 2
   - Attiic A/H提供MBDRM，MBATH，第二间卧室和LR

   同一WeilMclain 3 - 155锅炉,但只有一个4 t欺诈densor (Trane XB14e or Trane XL15i) with 3 zones (Master, Mbath and Bed2) (LR,DR, K, P, Bath2) & (Lower level). Both the boiler and A/H would be installed in the mechanical room. He said his Manual J calcs was just under 3 1/2 T unit and HL of 53,000. He also reccomended the Trane zoning system (touchsreen, wireless)) to optimize eff vs. 'a traditional wired zoning system' thermostat

   4-区域1-（进入上层）位于阁楼中的第一个Compoany 4T A/ H
   Zone 2 Lower level FR, Bed3, Bath3 ) Carrier 1.5 T 13 SEER units located in the mechanical room
   这些单元不是可变速度单元

   5-在3吨AH上安装阁楼，2个区域的2 t AH（2吨 - Mbedmbath，bed2）（房屋其余部分3T）。

   他还推荐了在地板下为LR Bumpout区域添加一个额外的循环，而不是踢脚板

   尽管这里有很多信息（我希望），但目前我的担忧是：

   - With such good insulation, windows and air sealing done for approx 2800sqft home, why am I getting a range of combined tonnage from 3.5T and 5T units reccomended

   -Should I be concerned with having 2 A/H and 2 Condensors vs. 1A/H and 1 Condensor (obvious per unit cost savings)

   3- By not installing the A/H in the attic, I would thing that my efficientcy and unit sizing? would be lower, certainly a benefit to overall performance/longevity

   4- 16 SEER vs. 13 SEER condensors, both offer rebates (of no real concern here), but my thought was that with the lower level having an exposed /insulated slab, it will already be cool and its effectiveness is really more for condensation purposes. Maybe use the 16 upstairs and the 13 downstairs.

   I m sure Im missing something here, but it is diffficult to compare w/o the Manual J & Ds in hand but there seems to be such a wide difference between these options.

   在我看来，使用较小的更高效的锅炉和A/H具有更好的设计和分区控件，同时将单位远离阁楼是最有意义的。

   BTW, these bids run from $27 - $49K !

   非常感谢

   5-

4. GBA编辑
   马丁·霍拉迪（Martin Holladay）|May 01, 2013 02:33pm|＃4

   克里斯，
   I'm guessing that you won't be too happy with my answers. But my opinions and advice haven't changed.

   The time to do a heat load calculation, a cooling load calculation, and a duct design are before the foundation is poured.

   您不能相信HVAC承包商执行负载计算（即手动J计算）。正如我在最近的博客中所建议的那样初学者的绿色建筑, anyone contemplating a building project should hire an engineer or a home energy rater --不是HVAC承包商 - 执行手动J计算。

   You're spending a lot of money on your house, but it looks like you've skimped on engineering and design.

   Finally, it looks like your house has about 10 rooms. For the price of your low bid ($27,000), you could easily afford to install a separate ductless minisplit unit in each room. (Not that I'm recommending that approach, of course.)

5. 
   克里斯·范·威尔根（Chris Van Wilgen）|May 01, 2013 02:44pm|＃5

   Thank you again for setting me straight, that article is very to the point. I'm on the hunt for an energy rater right now. I will update

6. 
   克里斯·范·威尔根（Chris Van Wilgen）|May 01, 2013 03:02pm|＃6

   Beleive me, I have tried to pursuad my other half in that direction, even if just for the lower level, to no avail

7. 
   理查德·帕特曼（Richard Patterman）|May 02, 2013 10:18am|＃7

   If you have radiant in the basement floor, I assume you have a boiler.
   为什么不辐射上两个级别？

8. 
   克里斯·范·威尔根（Chris Van Wilgen）|2013年5月2日上午10:51|＃8

   最初的计划是在倾倒的地板上放辐射。两位原始建筑商都表示，这对我们的项目来说太贵了。我们有一个相当固定的预算来努力，因为银行评估师认为我们的项目对我们的邻居（斗篷，饲养的牧场和中心殖民地！（这是一个整体问题），并将我们完成的价值低12％）。我们同意这将是第一件事，因为我们仍然需要添加管道系统。

   Since yesterday, I have placed 6 calls into Energy Raters by Martins reccomendation in hopes of having an independent create a viable system for our project. I have talked with our utility provider (UI) in the past and they told me it would cost about $1000 for them to review and suggest. ( not really sure they could be considered an independent ) or that they would be able to help up with our system design as we are using propane as a heat source, so I passed.

   By reviewing many of the HERS sites out there, I really get the really that many our just caulk and go type operations. So I still remain a little skeptical