Questions tagged [heat-pump]
The heat-pump is a type of central heating system that extracts heat from the outside, reversing the process used by a central air system.
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Finding Bryant Heatpump model
I am trying to find details about a heat pump model that a contractor provided me a quote for.
The specific model is
Bryant Inverter heat pump 38MURAQAQ36B3 [High Heat]
I tried to google, bryant ...
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GoodMan heat pump only heating a few minutes at 88 deg before I the air goes back to room temp and the elements turn on
I have a Goodman heat pump with a A30-10 air handler.
When the thermostat turns on the heat, it starts to warm the duct air to about 87-88 deg and then I hear a humming sound start and get louder, ...
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System has Orange, Blue and White wires.. but thermostat does not have a place for each!
Trying to update thermostat so we can set BOTH heat and cool temps. Right now, we get to play the 'go change to heat/cool' game based on what the weather is doing..
OLD thermostat has (terminal / wire)...
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Energy efficient home improvement tax credit
I have been doing some reading for the tax credits available for furnace and heat pump installations.
https://www.irs.gov/credits-deductions/home-energy-tax-credits
and
https://www.energystar.gov/...
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Can heat pump completely replace natural gas furnace
My current home heating is through a natural gas forced air furnace.
I have tried to get quotes from multiple contractors.. all of them basically keep saying that I need a backup natural gas furnace ...
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I have an Rinnai boiler/water heater, one zone. It worked well for 2 years and then began errors
Got E: 140 heat exchanger overheating. The propane company came out and replaced the internal circulator 2 weeks ago. Last night same error. they replaced it again but it still didn't work and they ...
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Oil Hydro Air & Heat Pump Efficiency
We recently moved into a 5 bedroom home in central Massachusetts with the following system that was installed in 2006:
3 zone hydro-air heat with Veissman Vitorond 100 boiler and Riello 40-F5 burner. ...
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Can a heat pump designed for mini-split system be used for central AC ductwork?
I am looking at replacing my old central AC unit with a heat pump one using existing ductwork. A contractor quoted me Fujitsu Airstage indoor unit AMUG48LMAS with outdoor unit AOUG48LMAS1. I checked ...
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How do I handle two wires on W2 terminal block of old thermostat when moving to new thermostat?
I have an old thermostat that I'm ready to replace.
The old thermostat has A/C, Heat pump with 1 stage auxiliary (electric forced air) heat.
I am replacing the old one with a Honeywell RTH6360D. I'm ...
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Heat pump, when it's not very cold, don't want to use auxiliary heat, is this controlled by thermostat?
We have a heat pump with electric furnace as the auxiliary heat source.
It's not extremely cold yet and the heat pump can get us to the correct temperature (without implementing auxiliary heat source) ...
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Place heat pump unit on concrete walkway or dirt/gravel?
The picture shows the location for a new heat pump. And as part of an upcoming hardscaping project, we will pour concrete in all this area to build a walkway:
We would like the HP to be installed ...
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Heat Pump - Air Handler circulates when using emergency heat
I have a Bosch Heat Pump that was installed this past summer with a Resideo thermostat. When I try to run my fossil fuel heat source (baseboard forced hot water), it turns the fan on to circulate air....
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Heat Pump Air Exchanger efficiency gains in Snow/Cold
I have a 5 ton Bosch air to air heat pump, just installed last fall. I built a small timber framed cover to protect it from snow. One thing I was hoping to also do was to cover the sides of the small ...
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Can I use an air source heat pump water heater for dehumidification of indoor line drying?
After living in the German-speaking world and becoming accustom to having a Trockenraum, which can be thought as a dedicated room of a building for line-drying laundry indoors backed by a blowing ...
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Is it ok to have condensate drain pipe onto concrete next to foundation?
Here is another madness my heat pump & heat pump water heater installer did: The condensate drain (operated by a pump) runs directly on the concrete, next to the exterior wall (and hence ...
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AOSmith Voltex Heat Pump Water Pump Stuck on Vacation Mode
AOSmith Voltex model# PHPT 60 100, about 10 years old. Was working perfectly fine in "Efficiency mode" (ie, heat pump only). Turned it on to vacation mode today as I'm about to leave on a ...
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Minisplit Head units produce heat far beyond set temp
My setup:
I have three C&H brand 9k head units upstairs in 3 different rooms. One 18k slim duct unit downstairs. And a 48k compressor outside.
The scenario:
It's 50° outside.
The three 9k units ...
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two stage heat pump and condensing boiler run off one 3rd gen thermostat
I have a 2 stage 20 seer bosch heat pump utilizing aux heat strip. I also have a navien condensing combi unit for domestic and hot water baseboard heating. no hydronic coil to air handler. Boiler only ...
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HVAC Heat Pump Outage
Upstairs zone heat pump with air handler in attic. Installed April 2022. Thermostat is an Ecobee3 Lite. Noticed this afternoon that Alexa wasn't getting a signal from the Ecobee. I went over to it ...
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2 stage heat pump and condensing boiler run off one 3rd gen thermostat
I have a 2 stage 20 seer bosch heat pump utilizing aux heat strip for second stage. I also have a navien condensing combi unit for domestic and hot water baseboard heating. Currently both systems are ...
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Help understanding half-built ductwork
I'm trying to understand a new ductwork system that was half-built and then abandoned. It was built with a cold-weather heatpump and possibly an ERV in mind. It has four supply lines fully ducted ...
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Sizing charts for air conditioner or heat pump for humidity rather than cooling? 1-stage vs. 2-stage? 3-stage? [closed]
Inevitably I'll have to replace my heat pump, and when that time comes I'd like to have the calculations on the size of the replacement to account for dehumidifying in addition to heating and cooling. ...
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Restoring automatic selection of natural gas heat vs. heat pump based on outdoor temperature [closed]
I had a Goodman SSZ14 series heat pump installed in 2008, with the installation came a then top-o-the-line Honeywell thermostat which provided the feature to select heating source (heat pump or ...
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heat pump defrost mode
North Florida usually stays above 45 Farenheit: the heat pump defrost mode is rarely needed. My neighbor's controller board has been replaced two times and we would like drill down to root cause.
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How cold can it get outdoors before air source heat pump sees damage from running? [closed]
I'll start with some background to set the scene for my question. About 15 years ago I got a heat pump and natural gas furnace to replace the air conditioner and natural gas furnace that had broken ...
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Can I use a UPS in front of my A/C heat pump, to reduce surges in the house?
Hopefully this is on-topic here. I'm open if I should as on another SE site.
We have an air conditioner heat pump outside, typical to most homes with one. When it kicks on, many of the lights dim for ...
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Why does Trane heat pump stop cooling?
I live in Phoenix, AZ and have an old Trane heat pump circa 1993. Over the past two weeks, several times the unit has stopped cooling yet the inside and outside units kept running. When this happens, ...
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Couple of questions on the outside unit of a split heat and A/C installation
I have a Viessmann heat and A/C installation where a single large common outside unit located on the roof connects to split units on three separate floors.
First question:
There is a pair of copper ...
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How can I attach the heatpump air handler unit to these walls without studs?
This is a camp and it's post and beam so there are no studs in the walls. From the drawings, it appears it goes from 1" monasote panels to 2" foam to 1" siding which doesn't leave me ...
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Condenser for my heatpump is wired with 3 capacitors, two of which go to the fan motor
I have a heatpump that has been extremely noisy and isn't spinning, so I'm going to replace that, but looking at the wiring did I discover an odd one. The condenser fan is a 1075RPM 1/5HP 1.3A 5MFD 4 ...
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Estimating heat pump energy usage
My house is heated by an old oil furnace, and the oil tank could spring a leak and flood our basement at any moment, so I'm hoping to replace it with a ground source heat pump this year. I'm trying to ...
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How good are heat pump water heaters compared to propane or electric?
I want to replace my 1996 Bradford White propane water heater with a heat pump water heater. Will it be saving costs for me? Located in NY.
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good heating/cooling for sunroom in Toronto
I have a east facing sunroom with 2 side glass. its 10x16 feet (length/breath). The highest point of the roof is 9 feet sloping to 7 feet.
Our winter goes to -20 degrees C and hottest goes to 35 ...
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Configuring FHW heating system as a backup to minisplit
I installed a minisplit HVAC (well, HAC) system a few years ago. Very happy with it as housewide AC, mostly happy with it as heating (more efficient than the high-efficiency gas forced-hot-water ...
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Changing TCONT802AS32DAA Thermostats to Honeywell T9 on Trane System with Honeywell HZ432
I'm hoping someone can confirm the wiring I came up with for changing out the Trane thermostats with Honeywell.
System is 2-Stage Scroll HP with Honeywell TRUEZone HZ432. The diagram shows the ...
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AC Heatpump fails after cooling for few hours
I live in the lower Ohio area. I have a heatpump, Airtemp brand air conditioning system that's only 6 years old, on days that are in the mid to high 80s (or hotter) the system will run until about 2:...
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Best way to re-route the water from AC drip line
After the contractors installed the heat pump near my house, they pulled the drip line (that is connected to the condensate pump near the furnace) right next to the outdoor unit, which results in:
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Why do variable speed heat pumps need a proprietary (communicating) thermostat and why does mine not need one?
For DIY context: I recently got a heat pump installed; I know many things are not optimal (e.g. ductwork) and I am scoping what I want to fix/improve myself.
All offers I got for variable speed heat ...
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From heat load to CFM and where does 400/ton come from?
Based on this answer I have finally calculated my heating load of the total house as well as the distribution for individual ducts (rooms). Note that the formula for the heat loads was:
BTH/h = ∆T * ...
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Is heating load related to volume of area/surface?
I am working to improve distribution of my heating (ductwork). I found multiple sources to calculate the heating load (either per room or whole house):
Most of them use the volume (room area times ...
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How to do heat load calculations for distribution with common return and/or open floor concept
Many calculators (example) can obtain heating load or the whole house or of a single room with room based on area, room height and other factors (windows, insulation etc).
My 1927 home has existing ...
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Heat Pump on continuous duty or put in a rest period
I have some hybrid hot water tanks - heat pumps - that are running continuously as the demand is higher than the units can supply.
Would it be better to have a rest period baked into the schedule or ...
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What data is available to support decisions about thermostat set point with mini split heat exchangers?
I have seen tons of references that say that the best way to run a mini split heat pump is to set it to target temperature and to let it maintain that temperature all day long, not differentiating ...
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Rheem heat pump burping every minute
I have a Rheem heat pump that is making a grunt sound every minute, even after the thermostat is set to off. At the same time it makes a 5k watt spike. Here is a video of it making the sound: https://...
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Is high standby power consumption of heat pump water heater normal and how to reduce?
I recently got my very well working tankless gas water heater replaced by a Rheem ProTerra 50gal HPWH.
I feel the water heater consistently draws way too much power (I measure with CT clamps). ...
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Criteria for Energy Star energy estimates of heat pump water heater
Every heating appliance in the US features an "Energy Guide" label stating "typical" usage. In my case, the Heat Pump Water Heater states an estimated yearly energy use of 837kWh.
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Can I turn an old fridge into a water chiller?
I want to cool down water to near freezing (<40F or <5C). I have an old fridge that I don’t mind ripping apart. I was wondering about the feasibility of getting the cooling unit in the ...
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Will a frozen up Evaporator Coil in a heat pump cause the Air Handler Fan Motor to die? [closed]
My previous question was closed, saying it was opinion based, but it was not, so I'll ask again.
The fan motor in our air handler died and was replaced by an HVAC tech. That lasted 1 day, then the ...
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Heat Pumps that can add moisture to dry indoor air in winter
I heard that there are heat pumps in Germany that have the ability to add moisture to dry indoor air in winter. In Northern climates interior air tends to be far too dry, uncomfortable for skin etc.
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Is a 9000 BTU split heat pump oversized for cooling a 156 square feet room (Quebec climate)?
I want to cool a single bedroom during the sumer with a split heatpump.
I will only run it during the night, with door closed because I don't mind heat during the day, I just have a hard time sleeping ...
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