Mechanicals
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How long of a length of flex does it actually take to minimize noise?
I frequently hear that rigid duct offers the best efficiency, but utilizing a section of flex duct off the register can help minimize noise transmission.That got me thinking though...how long…
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Best Configuration for Mitsubishi Multisplit
Looking to replace an existing HVAC system with a Mitsubishi multi split and just so happened to run across a previous post talking about issues with multi split systems efficiency…
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Limescale in Heat-Pump Water Heater
I had assumed that a heat-pump water heater would produce much less limescale than a conventional electric water heater, because one of the partial remedies for elements that get coated…
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Shoe taps instead round take-off on residential system?
There seems to be a number of different style take-offs (bellmouth, conical, HETO...) in varying efficiency used with rectangular duct but when it comes to round duct there are far…
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Erv or hrv with no central air recommendations
So for my new house I’m planning on Mitsubishi for heating and cooling posssibly supplement with radiant depending on what we come up with when we do our mechanical layout…
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High-Efficiency Round-Duct Fittings
There are a variety of different take-off designs for rectangular ductwork (Standard, HETO, Bellmouth), but I have had a hard time finding similar products for round ducts. Any suggestions on…
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Remote Thermostat for Ductless Minisplit in Cold Climate
Hi all, Any experience with alternative remote thermostats for Mitsubishi mini-splits that sense temperature at that location and feed it back to the mini-split? We're in VT and from researching…
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Suggested replacement ERV for UltimateAir DX200?
I've been having loads of problems with my 200cfm UltimateAir DX200 in my new construction. I think most problems stem from the fact that my builder was running the ERV…
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Do Higher BTUs per CFM for Cooling Equal Better Dehumidification
Is it correct to believe that, all else being equal, a system producing more cooling btus per cfm will probably be dehumidifying better than a system with fewer btus per…
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Mini Split Equipment Selection Zone 3A
I've been going in circles trying to choose a mini split system to replace my 36(!) year old heat pump. Would love a little sanity check or guidance from some…
