HVAC Discussions (36)

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Floor level return added to attic ductwork.

Hello everyone and Happy Holidays! Attic ductwork is ubiquitous in extant, single floor, single family housing and we are all too aware of…

Started by Steve WacloLatest Reply

Now for Something Different

Now that my wife and I are involved in BPI training and plan to conduct field test at our residence, the work scope for integrated HVAC has…

Started by John PorterfieldLatest Reply

Are Zoned Heating/Cooling Systems a Good or Bad Idea?

For starters, I live in Atlanta, Ga and I am not an HVAC pro so this is a serious question that I would like answered for one of my clients…

Started by Jon LaMonteLatest Reply

Discussions Replies Latest Activity

REMRATE Modeling of 2 stage Heat Pumps - Including GSHP

I have a REMRATE /Modeling Question. How are people determining percentage of load when modeling two stage heat-pumps (especially GSHP) whe…

Started by Jeremy Begley

1 May 16, 2018
Reply by David Butler

Manual S for Water Furnace Equipment

Does anyone have experience doing ACCA Manual S for Water Furnace equipment? As far as I can tell they do not provide enough data to proper…

Started by Jeremy Begley

6 Mar 23, 2018
Reply by Danny Gough

joining ducts

A question came up on exhaust duct connections. I have always considered screws necessary for mechanical fastening of one duct to another.…

Started by Don Fugler

21 Nov 28, 2017
Reply by Dara Bowser

HVAC integration – the past, the present, and the future

HVAC integration – The past When the first air conditioning systems came in, they were simple mechanical “machines”, with very few electric…

Started by Igor Mitbarg

1 Apr 11, 2017
Reply by Lucifer Prescott

Efficient furnace with maximum temperature

Furnace with maximum temperature used for melting and semi heating purpose. By this we can achieve the strengthened steel.

Started by Thaara

0 Mar 30, 2016

Zehnder North America seeks qualified QA agents

       Hello Energy Pro’s. On behalf of Zehnder North America, I would like to put out a request for 3rd party QA/commissioning agents acro…

Started by Gary Baggett

0 Mar 4, 2016

Target superheat formula

You said take wet bulb at unit not in the house am i right or did i miss understand the formula

Started by Miguel Orduno

6 Feb 18, 2015
Reply by John Proctor

Now for Something Different

Now that my wife and I are involved in BPI training and plan to conduct field test at our residence, the work scope for integrated HVAC has…

Started by John Porterfield

2 Jan 12, 2015
Reply by John Porterfield

Floor level return added to attic ductwork.

Hello everyone and Happy Holidays! Attic ductwork is ubiquitous in extant, single floor, single family housing and we are all too aware of…

Started by Steve Waclo

1 Dec 14, 2014
Reply by Bob Blanchette

Furnace with ECM: How to Model

Suppose you have a forced-air natural gas furnace.  At the end of its life, you are considering replacing it with an ENERGY STAR model.  In…

Started by Barbara Smith

5 Nov 13, 2014
Reply by Ryan Schmidt

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Discussion Forum

REMRATE Modeling of 2 stage Heat Pumps - Including GSHP

Started by Jeremy Begley. Last reply by David Butler May 16, 2018. 1 Reply

Manual S for Water Furnace Equipment

Started by Jeremy Begley. Last reply by Danny Gough Mar 23, 2018. 6 Replies

joining ducts

Started by Don Fugler. Last reply by Dara Bowser Nov 28, 2017. 21 Replies

HVAC integration – the past, the present, and the future

Started by Igor Mitbarg. Last reply by Lucifer Prescott Apr 11, 2017. 1 Reply

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