Compare Heat Pumps - Broan FT4BI iQ Drive vs.Trane XL20i
Any comments? Which is more efficient, reliable, comfortable, less prone to malfunction or mfg. defects?
Reference my other threads regarding Manual J and sizing a replacement heat pump for my 1827sf Florida home with too many windows. LOL
jtrammel sent me to the Comfort Institute website and the Maytag/Broan dealer actually came out and did a whole house evaluation, including blower door test, flow hood evaluation, house and window measurements, insulation R-value, and load calc. He didn't ask or care about the size of my old system, and said it didn't matter because the load calc (which he did on his computer after he got the test results and took measurements) would determine the correct size for the replacement. He's working up a quote on two equipment options that he'll email me in a few days. He did leave the infiltration and duct leakage reports with me, but of course, he didn't leave me with a copy of the Manual J results (I guess so it can't be used by someone else). However, he discussed his Manual J results with me and compared them with the Manual J printout I received from the Lennox dealer. Both load calc's were very close and both recommended a single stage system capable of 42000 BTU.
When we got into the discussion of dual stage and/or multi-stage options, he explained very clearly the differences in cooling performance between dual stage and/or dual compressor units and the IQ Drive multi-stage compressor. At design conditions, both dual stage and dual compressor units max out at the rated tonnage, i.e., the most cooling you'll get from a 3 ton is 36000 BTU. With the multi-stage operation of the IQ Drive compressor, it maxes out at 118% of rated tonnage. That is, a 3 ton IQ Drive will provide up to 42480 BTU (3.5 ton)
Based on Manual J load calculation he recommends either the 3 ton 21 SEER Broan FT4BI iQ Drive, or the 4 ton 16 SEER Broan FT4BF.
The best part is that Broan is an RE Michel brand and this dealer can get the equipment through RE Michel for me practically wholesale using my son's employee discount (he manages the Orlando RE Michel). I'm hoping this brings the overall cost into my price range, but we'll see.
What do you all think?
Duct Leakage & Infiltrometer Reports
I'm attaching the Duct Leakage Flow Hood Report and the Infiltrometer Report.
Originally Posted by jtrammel
Static pressure wasn't a number that was shared with me, unless it's in one of these reports.