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Created November 11, 2023 07:42
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subreddit_heatpumps
[
{
"question": "The discussion revolves around the benefits and practical considerations of using heat pump clothes dryers. Key aspects include their placement flexibility, energy efficiency, and impact on clothes and home environment.",
"solutions": [
"Heat pump dryers can be placed anywhere due to being unvented, offering more space and utility in homes.",
"These dryers are energy-efficient, reducing electricity bills and HVAC workload by not requiring external venting.",
"They are gentler on clothes, extending their lifespan.",
"Initial higher costs can be offset by deals, rebates, and long-term energy savings.",
"Users shared experiences with specific models, both positive and negative, and discussed maintenance and installation challenges.",
"The thread also touched on broader topics like energy costs, efficiency in different climates, and comparisons with traditional drying methods."
],
"url": "https://www.reddit.com/r/heatpumps/comments/11tt4ga/the_case_for_heat_pump_clothes_dryers/"
},
{
"question": "The main discussion in the Reddit thread is about how heat pumps can take advantage of off-peak pricing, specifically in the context of BC Hydro's peak/off-peak pricing. Users are exploring strategies to optimize heat pump usage during different pricing periods and discussing the impact on efficiency and wear and tear.",
"solutions": [
"Adjusting the heat pump's set temperature before off-peak periods end and reverting it afterwards to maximize efficiency during cheaper electricity rates.",
"Considering the natural heating and cooling patterns of heat pumps in relation to outside temperatures and time of day to align with off-peak pricing.",
"Integrating smart home systems like ecobee with Home Assistant to calculate the cost-effectiveness of using electric vs. gas based on time of day and outdoor temperature.",
"Monitoring real-time kWh usage of heat pumps to make informed decisions about their operation.",
"Exploring the use of current sensors and energy monitoring systems like Emporia Vue for detailed tracking of energy consumption."
],
"url": "https://www.reddit.com/r/heatpumps/comments/11l2oxi/bc_hydro_applied_for_peakoff_peak_pricing_how_can/"
},
{
"question": "The Reddit thread discusses experiments with a Rheem 50 gal heat pump water heater in Ontario, focusing on optimizing electricity usage under a new time-of-use plan with varying rates throughout the day. The user aims to understand the impact of different heating schedules on electricity usage and cost, considering the new rates.",
"solutions": [
"Adjusting the water heater's schedule to heat water during ultra-low peak hours (11 PM - 7 AM) significantly reduced electricity costs.",
"Heating the tank to a higher temperature (130 F) overnight increased average tank wattage slightly but was cost-effective due to lower overnight rates.",
"The user found that this scheduling did not impact the availability of hot water in the evenings.",
"Using an Emporia Vue 2 for accurate tracking of electrical usage was recommended over the Rheem app, which showed higher usage.",
"The discussion also included insights on the impact of incoming water temperature on efficiency, suggestions for using drain water heat recovery units, and a link to a water heater cost calculator."
],
"url": "https://www.reddit.com/r/heatpumps/comments/zk4dho/rheem_heat_pump_water_heater_time_of_use/"
},
{
"question": "The Reddit thread focuses on strategies for optimizing the use of heat pumps with off-peak power rates. The user, who has three pumps with four heads and pays $0.32/kWh, is exploring ways to benefit from an EV rate for night charging at $0.09/kWh. The discussion includes considerations of cost-effectiveness, comparing the expenses of using heat pumps versus gas heating, and the impact of high electricity rates in San Diego.",
"solutions": [
"One user suggests considering the Coefficient of Performance (COP) of heat pumps to evaluate their efficiency and cost-effectiveness.",
"The discussion highlights the challenges of high electricity rates during peak times (4-9 pm) under a Time of Use plan, especially in areas like San Diego with rates as high as $0.63 per kWh during summer peak times.",
"The thread also touches on the potential of using off-peak rates after 9 pm, which average $0.32, to reduce costs."
],
"url": "https://www.reddit.com/r/heatpumps/comments/yw6hw9/off_peak_power_with_heat_pumps/"
},
{
"question": "The Reddit thread discusses the practicality of using time-of-use (TOU) electricity rates to optimize heat pump running costs in Ontario. The user is considering the impact of a new TOU plan with an ultra-low overnight rate, particularly for heating homes and charging electric vehicles.",
"solutions": [
"Heating the water tank to a higher temperature overnight and adjusting it during the day to align with TOU rates.",
"Pre-cooling or pre-heating the home during cheaper electricity periods to reduce costs during peak times.",
"Using smart thermostats like ecobee with Eco+ service to automatically adjust for TOU rates.",
"Considering the efficiency of homes and solar gain during the day to minimize heat pump usage during peak hours.",
"Exploring options like ASHP water heaters and battery storage for better energy management.",
"Avoiding thermostat setbacks at night with heat pumps, as they may be less efficient during colder hours."
],
"url": "https://www.reddit.com/r/heatpumps/comments/y4r8wo/time_of_use_electricity_rates_and_heat_pumps/"
},
{
"question": "The user is choosing between Carrier and Mitsubishi ductless heat pumps for their home, currently heated with a wood stove and baseboard heaters. They are considering the Carrier 38MGHBQ30DA3 with 4 mini splits for $14,400 before a $5k grant, and the Mitsubishi MXZ-3C30NAHZ4 with 3 mini splits for $13,100 before the grant. The user is concerned about the performance in cold temperatures (-30 to -35 degrees) and has read mixed reviews about Carrier.",
"solutions": [
"The Mitsubishi model is suggested to have more capacity, but there are concerns about whether two units on the first floor are necessary for adequate heat distribution.",
"For the house size (1,700 sqft plus a basement), the capacities of both options might be stretched, especially in extreme cold. Baseboard or wood heat might be needed as a supplement.",
"The Carrier model is noted to have a slightly higher BTU output at 5 degrees compared to the Mitsubishi.",
"It's recommended to consider the 99% design temperature and compare systems on NEEP, focusing on capacity at low temperatures rather than just standard efficiency values.",
"The Carrier units, made by Midea, are noted for modulating lower than Mitsubishi, which could be more efficient at moderate temperatures.",
"Mitsubishi is generally praised for quality and reliability, and its hyper heats are noted to perform well in cold temperatures.",
"Some users shared personal experiences with Mitsubishi and Fujitsu, favoring Mitsubishi for its performance and noise level.",
"It's mentioned that neither brand will be highly efficient at -30 degrees, but Mitsubishi might perform better and quieter than Carrier."
],
"url": "https://www.reddit.com/r/heatpumps/comments/12wumv2/carrier_vs_mitsubishi_ductless/"
},
{
"question": "The main discussion revolves around choosing between Lennox or Gree for replacing a 26-year-old Trane AC and a 13-year-old Trane furnace in California. The focus is on whether to go for a central ducted system with Trane or Carrier, or consider alternatives like Gree R410a or a Costco program with Lennox.",
"solutions": [
{
"HybridSystem": "Consider keeping the existing furnace as a backup while replacing the AC with a heat pump like Gree Flex. This could be more cost-effective and compatible with existing systems."
},
{
"Compatibility": "Discussions about the compatibility of new heat pump systems with existing furnaces, coils, and thermostats. The efficiency and comfort levels of single-stage versus multi-stage systems are also considered."
},
{
"BrandConsiderations": "Gree is noted as a Chinese brand, with concerns about parts availability and technical support. Decisions should be based on specific specifications, price, and local climate needs."
},
{
"LocalClimate": "Tailored solutions are suggested based on the local climate in California and the specific needs of the user."
}
],
"url": "https://www.reddit.com/r/heatpumps/comments/127ry3o/lennox_or_gree/"
},
]
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