Bob Blanchette's Discussions (447)

Discussions Replied To (25) Replies Latest Activity

"+1 on the typical GROSS oversizing of furnaces. A "2 burner" (typically 50k or small…"

Bob Blanchette replied Nov 6 to Furnace with ECM: How to Model

5 Nov 13
Reply by Ryan Schmidt

"There's more to it than that. The blower efficiency gain comes using an ECM for low…"

Bob Blanchette replied Nov 4 to Furnace with ECM: How to Model

5 Nov 13
Reply by Ryan Schmidt

"Amen. Limiting size per sqft would be more effective IMHO. It would have to be insta…"

Bob Blanchette replied Aug 15 to ENERGY STAR Furnaces & Failure of DOE Standard

7 Aug 15
Reply by Bob Blanchette

"Motor efficiency could be improved 25% by using a single speed PSC motor instead of…"

Bob Blanchette replied Aug 12 to ENERGY STAR Furnaces & Failure of DOE Standard

7 Aug 15
Reply by Bob Blanchette

"But it's so much easier to size by the 500sqft per ton rule that's been used for dec…"

Bob Blanchette replied Jul 4 to Are Zoned Heating/Cooling Systems a Good or Bad Idea?

24 Jul 5
Reply by John Proctor

"This is exactly why oversizing continues, nobody is willing to stick their neck out.…"

Bob Blanchette replied May 5 to How to Read Load Calculation Reports

37 May 5
Reply by Bob Blanchette

"90% of residential installs are done by the WAG or rule of thumb methods. 500sqft pe…"

Bob Blanchette replied May 3 to How to Read Load Calculation Reports

37 May 5
Reply by Bob Blanchette

"60k is INPUT of your furnace right? If it's a typical 80% that would give you a 48k…"

Bob Blanchette replied May 3 to How to Read Load Calculation Reports

37 May 5
Reply by Bob Blanchette

"He's not going to want to "break the norm" of the 50btu per sqft he's been installin…"

Bob Blanchette replied Apr 27 to How to Read Load Calculation Reports

37 May 5
Reply by Bob Blanchette

"80k x 96.2% = 77k output. No need for a 100k furnace. Oversizing will render the pur…"

Bob Blanchette replied Apr 27 to How to Read Load Calculation Reports

37 May 5
Reply by Bob Blanchette

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