HVAC (76)

Oily Stuff in ERVs

I visited a house a couple of days ago that was full of HVAC issues.  About 4000 square foot house with multiple systems including two poorly installed ERVs.  Summer house, so it is infrequently used.  When I opened the covers on each ERV an oily sub

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5 Replies

Hydronic System Critique

Good day folks

First many thanks, especially to David, for your help in determining the needed BTU's to heat air.  It was a very good discussion for me which forced me to defend (I believe successfully) to heat my domestic water with a Hybrid Heat Pum

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8 Replies

Heat and A/C on a boat

My 40 foot sailboat is only about 100 ft2 of floor space, the surface area is more that of a mobile home - long and narrow, the hull and deck are about an R-5, the glass is all single pane, and there are skylights and hatches that let in ALL of the s

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3 Replies

REALLY????

I am working my way through ACCA's latest manual LLH (Low Load Homes). The postulate of continuous fan increases indoor humidity in the cooling season arises in Section 8. This principle has been shouted from the roof tops of many building science ve

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12 Replies

high rise humidity

I have a friend/client with dry conditions in his condo. He's on the top floor of a 17-story building.  He's always had dry conditions, but after a major renovation made necessary by water damage (ironic, I know) from a busted fire sprinkler pipe, he

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7 Replies

Bath fan weirdness

I recently measured disappointing bath fan flows at a project - both being below our program minimum of 50cfm. The builder had the installer come back to have a look and found nothing obvious but he did get a couple of new fan motors and swapped them

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13 Replies
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