Community: Mechanicals

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5 Answers

Hydronic Heating System Hydraulic Buffer Tank vs Hydraulic Seperator

This question might be more appropriate in a plumbing forum but I have had such great and thoughtful responses in the GBA forums I look to here first. This is also a hydronic heating mainstream topic which should be appropriate for GBA.

Asked By Roger Smith | Feb 26 17
13 Answers

Air conditioning for a radiant heated home?

We're planning a new two-story house build in Ottawa, Ontario, probably equivalent to zone 6/7 on the US chart. We are planning to use hydronic heated floors on all three levels.

What are the most common approaches for adding air conditioning to a house with radiant floors? We will have a fairly comprehensively ducted HRV/ERV system.

The house will be superinsulated (~R40 walls, R60 attic, R20-30 below grade) with southern exposure and proper window shading to limit solar radiation. Finished plans should be around 2500 sqft.

Asked By Lance Peters | Feb 5 17
4 Answers

Integrating Ducted Mini-Split with HRV

Hello,

Asked By John Brown | Feb 25 17
8 Answers

Heat-pump water heater for an all-electric garage apartment?

We our building a detached garage w/ 2nd story apartment (1 bedroom, ~900 sq ft conditioned space) & debating the system to heat water:
- Primary purpose for the garage apartment is for our mothers to live in as they age. Mainly for safety reasons, we're not having gas service to the apartment (could do relatively easily - main house has gas service)
- Cooling-dominated climate (Houston TX)

Asked By Robert Hallenbeck | Feb 8 17
6 Answers

Basic HRV concepts/design

We are building a SIP panel [house], open concept, vaulted living room, with a second floor. Radiant in floor heat. 1500 sq ft main, 500 sq ft upstairs.

Our local HVAC contractor (small community, not many contractors to draw from) is telling us we must have an HRV supply and a return for each room. Ie: each bedroom is to have a supply and return, each bathroom is to have a supply and return. We thought the basic concept was more like each bath would have a return and each bedroom was to have a supply.

Asked By Rebecca Borton | Feb 25 17
7 Answers

Sizing mini-split for cooling & humidty control.

We are building a small cabin in CZ 6. It is a seasonal cabin that will see limited winter use so while we do want a mini split that will heat the space we are not concerned if it ends up being undersized. There is so much free firewood in the area that the Forest Service and private land owners often burn huge slash piles in the winter just to get rid of it. I also have access to hundreds of board feet of free hickory cut-offs from a local cabinet shop. So we'll have a wood burning stove regardless.

Asked By Chris Harper | Feb 23 17
19 Answers

HTP Phoenix Light Duty paired with Lifebreath Clean Air Furnace (downdraft)

I want to replace the atmospheric water heater (interior to my house) with sealed combustion. I also wanted to replace the 80% furnace that sits right beside the WH interior to the house. I learned early from GBA that inside combustion is to be avoided.

Fast forward...I am looking at the HTP Phoenix Light Duty + Lifebreath CAF (downdraft). I am in the Seattle, WA area in a 1950's rambler.

Asked By S K | Jan 11 17
6 Answers

Heat-pump water heater availability and reliability

I was set to buy a geospring until I found out that they discontinued them. Does anybody have an opinion on the other brands out there?

Asked By user-6765908 | Feb 15 17
17 Answers

Electric tankless hot water

My name is John, and I'm an instructor at Madison Area Tech College in Madison Wi, in the Construction and Remodeling Program. We train or students in a 1 year diploma program how to be wood frame carpenters. We build super high efficient tiny homes with the students, that we sell. We incorporate lots of things talked about on this site. One thing we are trying to figure out: How to efficiently heat water without taking up too much space.

Asked By John Stephany | Feb 7 17
1 Answer

I have two specific questions regarding efficient home-run plumbing design

My wife and I are currently working with a local design/builder on a set of plans for a small home in Silver City, NM (4B). The main bathroom, mechanical room and kitchen are all grouped together on the 850 square ft main floor. A second bathroom, located directly above the main bathroom, is planned for the 550 square ft loft. The wall assembly will be 2*6, dense pack cellulose, 1 inch of EPS exterior the sheathing, and fiber-cement siding.

Asked By Aaron Beckworth | Feb 17 17
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