Ensuring proper duct design in HVAC systems saves money.

It costs money to run a fan.  The harder it has to work, the more money it costs.  If air fans are controlled from a VFD, then slower speeds also mean less noise.  There are lots of advantages to paying attention to ductwork.  In most projects is it not even considered.

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 The benefits of Ground Source Heat Pump (GSHP) systems far outweigh the costs associated with them.

September 22, 2017 by Pete Prydybasz

Although rebates provide big incentives, they also can cause a false market. That’s not to say there isn’t still a market for GHPs but because the rebate incentive has expired, the systems are considered too expensive by the average consumer. Unfortunately, factored in with the total investment of a GSHP system is the fuel source installation cost. So, a conventional system that costs $15,000 installed, is more inviting to a consumer than a geothermal system for the same property at $25,000 to $30,000. Since the oil or gas for a conventional system is not purchased at one time, it is not considered in the cost of the installation. On the other hand, a GSHP system requires the energy be installed at the same time the unit is installed in the building, which requires more of an upfront cost.


To understand this joke, see the original joke, Santa Claus: An Engineering Analysis

If people are going to attempt to apply science to the question of Santa, the least they can do is to get it right. The so-called "Engineer" that wrote the paper suggesting that Santa Claus is dead had it all wrong.

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