nga <bruni...@usna.edu>
Sent: Wednesday, November 29, 2017 1:17 PM
To: ROBERT
Subject: RE: [EVDL] Heat pump vs resistive Heater (OT, but somewhat EV related)
Your email was hard to read since there 2were no paragraphs, but I get the gyst.
I agree, Thermal solar hot wter heating is dead
.
Bob
*From:* ROBERT [mailto:bhensle...@msn.com]
*Sent:* Wednesday, November 29, 2017 5:01 PM
*To:* Robert Bruninga; ev@lists.evdl.org
*Subject:* Re: [EVDL] Heat pump vs resistive Heater (OT, but somewhat EV
related)
My point was solar hot water collectors do work if the system is designed
bject: Re: [EVDL] Heat pump vs resistive Heater (OT, but somewhat EV
related)
You guys are correct about a heat pump being more energy efficiency than a
resistance heating element. I recently installed a hybrid hot water
heater. I have an external energy monitor on this circuit. The hybrid
hot
: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Peri Hartman via
EV
Sent: Wednesday, November 29, 2017 10:07 AM
To: Electric Vehicle Discussion List
Cc: Peri Hartman
Subject: Re: [EVDL] Heat pump vs resistive Heater (OT, but somewhat EV
related)
The issue with a heat pump is sizing, at least
On 29 Nov 2017 at 15:07, Peri Hartman via EV wrote:
> if you choose a heat pump, make sure it will generate the BTUs you
> need at your coldest temperature or supplement it with some resistance
> heating.
Every home-HVAC heat pump I've ever seen has had supplemental and/or
"emergency" heat.
Message --
From: "Cor van de Water via EV" <ev@lists.evdl.org>
To: "Electric Vehicle Discussion List" <ev@lists.evdl.org>
Cc: "Cor van de Water" <cwa...@proxim.com>
Sent: 29-Nov-17 1:31:40 AM
Subject: Re: [EVDL] Heat pump vs resistive Heater (O
The efficiency never drops below that of a resistive heater.
They don't do their magic much below ~10 Fahrenheit, but they will work
to below zero. They actually have a resistive heater built into the
outside unit to defrost the coils if they build up ice. I have two heat
pumps on my house in
You can look up "How to install a mini split" on YouTube. The units
typically come with poorly translated, but still very useful, DIY
installation instructions.
It is best if you have a gauge set and a vacuum pump, but if you are
careful and detail oriented, you can use the "purge and bleed
t: Re: [EVDL] Heat pump vs resistive Heater (OT, but somewhat EV related)
On Tue Nov 28 20:11:48 PST 2017 ev@lists.evdl.org said:
>Heat can't magically be obtained from cold air.
>
>As the temperature drops, the pump must do a lot more work for an ever
>smaller amount of heat.
The one I j
On Tue Nov 28 20:11:48 PST 2017 ev@lists.evdl.org said:
>Heat can't magically be obtained from cold air.
>
>As the temperature drops, the pump must do a lot more work for an ever
>smaller amount of heat.
The one I just had put in the cabin is better than an electric heater down to
around 0 deg
Heat can't magically be obtained from cold air.
As the temperature drops, the pump must do a lot more work for an ever
smaller amount of heat.
Al
On 11/28/2017 11:03 PM, Bill Dube via EV wrote:
Thanks for the Wikipedia reference. Here is the link:
https://en.wikipedia.org/wiki/Heat_pump
On Tue Nov 28 20:03:14 PST 2017 ev@lists.evdl.org said:
>I replaced a resistive space heater (about $120) in my two car
>garage/shop with a heat pump ($1300, Ebay) and it uses *one fifth* the
>energy. (SEER 21, 18000 BTU, heating and A/C) Paid for itself in a less
>than two years of operation.
Thanks for the Wikipedia reference. Here is the link:
https://en.wikipedia.org/wiki/Heat_pump
Folks are often puzzled by the "up to 4x efficiency" of heat pumps. "How
is that even possible?" is the most common question. (And the common
sense question as well...)
Well, heat pumps do indeed
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