
The DM-2A Manometer was updated in 2011 with the most recent software through Retrotec's exchange program where you send your manometer to them and in return you get a refurbished unit that has been recalibrated and had the latestsoftware installed. This was done in July, 2011. This Blower Door is 2 years old and is in very good condition. This is an extra set that has been used on about 20 home…
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