There's no judgment on the brand or model. , Most heat pumps range between 1 ton and 5 tons (in half-ton increments). Energy efficiency (SEER rating); primary factor. You should also get professional heat pump maintenance every year. We also have a small glass front woodburner where we occasionally burn wood scraps and junk mail ;O) It not only can add warmth to the house if needed, but also serves as a pre-heater for the air that is feeding our heat pump water heater. "ItemImage467" : "/assets/images/ExtendedSitesCatalogAssetStore/products/medium/HeatPro-2012.jpg", "BTU Input_50,000 - 100,000":"4" We will have walls. https://www.trane.com/residential/en/products/ductless-systems/mini-split-indoor-unit/ph-series-outdoor-heat-pumps/. . ", Useful overview of boiler and furnace efficiency, To access this benefit, you must be logged-in and a member in good standing, Log in or join to access all savings, benefits and resources. Hope this helps. For those who don't know what that is, you have the heat pump working but instead of running refrigerant lines all around the house, you run them into where your boiler currently is and instead of changing anything in the unit, no splits or anything inside you just heat up the forced hot water pipes. You can get it from solar panels. Perfect for heat pump installation. Natural gas is mostly methane, and methane is a more potent greenhouse gas than carbon dioxide. If you run it for 2300 hours per year, that would be 6.3 hours per average day, yielding 12.7 kWh per day. ,"ItemAngleThumbnail" : { shoppingListJSItemList = new ShoppingListJS({storeId: '10201',catalogId: '10057',langId: '-1'}, {id: '', name: 'HeatPro Heat Pump', image: '/assets/images/pools/products/small/HeatPro-Right.jpg', type: 'callback', components: {}, skus: []}, {}, "shoppingListJSItemList"); The modeled annual heating costs for this system are over $2,404 per year. Some are designed to be weak because they only have a small load to deliver. Carrier is a top brand in the HVAC industry and provides versatile heating and cooling solutions that improve energy consumption and save you money in the long run. Hope this helps a bit. The EIA generally has a lot of useful data. "image_4" : "/assets/images//assets/images/poolscanada/products/medium/5_HeatPro-100K-BTU-Heat-Pump.jpg" I am having a tough time considering a heat pump more efficient and less costly to use. It presumes that the unit will run 1% of the time at 100% output, 42% of the time at 75% output, 45% at 50% output, and 12% at 25% output. The brand provides quiet heating coupled with robust performance. Yes, that that might be a fair point, but I really think it's going to come down to the layout like there are some so the way these especially if you have a ductless option and it's blowing air, you can only blow in one direction. For 1 sq ft, you would need 30 BTU of heating/cooling output. SEER is a measure of cooling performance. square footage): You can see for the heat pump size table that, for example, a 2,000 sq ft house requires around 60,000 BTU or a 5-ton heat pump. "ItemThumbnailImage" : "/assets/images/ExtendedSitesCatalogAssetStore/products/thumb/heatpro-ahri-hp21124t.jpg" New construction might install a 90% or better system. As I mentioned it's not particularly powerful. on Hardie Plank siding, and $10 - $13 per sq.ft. Ottawa area. We have a similar spreadsheet for cooling degree days, although there's almost no cooling to be done in New England, in Massachusetts. Whether you use heat pumps or natural gas, the best first investment you can make is insulation and air sealing. When the ambient temperature is 17 Fahrenheit, this system moves a minimum 11,628 BTU/hr at a cost of 0.92 kW. "BTU Input_50,000 - 100,000":"4" "Heating Type_Heat Pump":"5" That will likely save you about 40% of AC and heating costs. In-Ground Heat Pumps; Model BTU C.O.P. In the summer, it pulls heat from the inside of your home and transfers it outside. We're using 2019 as a starting point just because when we first developed the spreadsheet, we hadn't completed 2020 yet, but you could pick any time period. That means that you get 3.8 kWh worth of heating for every 1 kWh of electric input. We've also given sources for things like cost of gas, so for instance if you click this link here, it will pull up a history. My home has alot of windows and a slideing glass door. Ill skip that because that's what this webinar is about. }, Where was the AOU, this Fujitsu one here. All right so, John asks, Your default example shows only about $120 annual cost savings between gas and heat pump looking operating costs. High performance, energy-efficient HeatPro heat pumps quietly and economically maintain the ideal water temperature at all times. CFM Calculator + CFM Chart, article about what size whole house generator you need here, MMBTU Per Day To MMSCFD Calculator For Natural Gas + Chart, 8 Best Infrared Heaters For Indoors, Patios, Garages (With ECO Thermostats), AGM Battery Voltage Charts: 12V, 24V Deep Cycle Battery Voltage, Lead-Acid Battery Voltage Chart For 6V, 12V, 24V, 48V Batteries, Natural Gas MMSCFD To MMBTU/Day Calculator + Chart, Natural Gas CCF To Therms Calculator + Chart (1 CCF = 1.037 Therms), Lithium LiFePO4 Battery Voltage Charts For 12V, 24V, 48V, 3.2V, Natural Gas MMBTU To m3 And m3 To MMBTU Calculator + Chart, Convert FPM To CFM: Air Velocity To Air Flow Calculator + Chart, How Long Will A 200Ah Battery Last? "ItemAngleFullImage" : { , Ceilings are 8 ft. not conditioning closets, bathrooms, hallways, vestibules, etc. Geothermal potentially offers a different way to approach that because you've got a constant 50 Fahrenheit ground temperature, so that same delta, that same max performance might be able to get you up to the temperature needed for hydronic heating system and that's I think that would be very cutting edge if there's one out there. This diagram is not brilliant because three of these steps likely happen in this one thing here and you've got this line kind of making it unclear where the compressor is or where the expansion device is. The solid model would be a better all around choice for New England, while the dashed model may be a better all around choice for the lower Mid-Atlantic and DC. We also include a variety of Heat Pump Sizing Tables and home-size examples you can use for quick reference or to double-check the results you get from the calculator. Note: These are low-temperature heat pumps. Its just what we're familiar what we can find in the market. If youre more familiar with heat pump sizing by the ton, this Heat Pump Sizing Chart will help. }, I set my heat pump to operate down to 40 F and then switch to the high efficiency gas furnace at colder temp, under the impression that the furnace is cheaper to run (cost of natural gas plus electricity for the furnace fan(2-3 amps)) than the heat pump (cost of electricity for heat pump and furnace fan) once temperatures get near or below freezing. If you have any trouble logging in or if you know someone's having trouble getting into the webinar, you can email hello@MassLandlords.net and Naomi will respond there, so let's get started. In most cases (depends on gas vs electricity prices), it makes sense to heat with a heat pump at 47K. During the colder months, it does the opposite by collecting heat from the outdoor air and bringing it indoors. Yes, Eric, I would love to retrofit for instance my own home with a hydronic heat pump. You can see electricity has tended to get more expensive over time. , Aren't New Gas Furnaces and Boilers Very Efficient? https://www.hvac.com/troubleshooting/what-temperature-thermostat-in-winter/. "ItemImage" : "/assets/images/ExtendedSitesCatalogAssetStore/products/large/1_HeatPro-100K-BTU-Heat-Pump.jpg", My contractor is a certified Daikin installer with an exceptional reputation. "catentry_id" : "4670625", Make sure you have correctly entered data relating to the boiler or heat pump you are considering. Thanks. "Related Products_Heater Accessories":"3" A sunny home in summer and a fully shaded home in winter will need more heat pump power. This is our heat pump versus furnace calculator, and Im going to start Im going to change the screen share a couple times. Customer reviews: Overall, customers seem very satisfied with this Carrier heat pump, giving it 73 five-star reviews. So, you are looking to have a combined heating output (heat pump + furnace) of at least about 30 BTU per sq ft or 39,000 BTU total for a 1,300 sq ft space (8 ft ceiling height). You should also seal any leaks in the ducts, lubricate the motors, inspect the belts for tightness and wear, check the refrigerant, and make sure the thermostat is operating properly. All heat pumps have above 100% efficiency because they do not generate heat from electricity. Hardie Plank Calculator estimates the cost of installing James Hardie siding on your house. And there is an addition or extension that is 25 x 20, or 500 square feet. Its wide it's deep. How do I calculate what size heat pump do I need? You would need about 75,000 BTUs. Gas leaks out of pipes at the rate of tens of thousands of metric tons per year in Massachusetts alone, from approximately ten thousand new leaks annually. "Features_Titanium Heat Exchanger":"2" Again we're not accurately predicting the total cost of air conditioning because depending on your set-point and how often you run it, if you run it all night long, if your house got very hot because you had a lot of solar penetration in the windows and so on, your air conditioning costs will be higher. Although it is sometimes common to see those systems coupled with an air conditioner, often the air conditioner is an electric system that's built into the ductwork and that feeds outside so it seems like you have air conditioning but you're not using the natural gas to get the air conditioning if that makes sense. You want to remember, if you're doing your own analysis we've got the link to the NEEP site right here. There's a whole lot of building structure and infrastructure that we really want to help members with so that's what we're going to focus on today. Never mind my reminder for good posture there. That's that gas tab, pretty simple. While our 12000BTU mini-split alone cannot be expected to meet the full heating demand during our rare sub-zero hours of the year, those times are tiny (literally just a few hours) compared to the months when having the highest efficiency mini-split reduces our energy usage and cost. [ If the average ceiling height would be 12 ft due to the cathedral ceiling going as high as 14 ft or even 16 ft, you should add about 50% to the calculation for the 8 ft ceiling. We're a 501(c)6 non-profit trade association. We take the cost of gas in terms of dollars per 1,000 cubic feet. "catentry_id" : "1027238", "Features_Titanium Heat Exchanger":"7" "ItemImage" : "/assets/images/ExtendedSitesCatalogAssetStore/products/large/heatpro-2012.jpg", You do have to add quite a lot on top on 2,907 watts for start up wattage. Use this information as a guide as you shop for the brand and model that best suits your needs. Maintenance, HeatPro Low Ambient Sell Sheet (LITHTPROLA19), HeatPro Owners Operation & Parts Manual (Round), Heat Pump Installations and Owners Manual (Square), In Ground Pool/Spa Heat Pump Heaters Installation & Operations Manual (Square), Titanium Heat Exchanger - excellent salt water and chemical corrosion resistance, Exclusive 'Ultra Gold' evaporator coil corrosion resistant especially in coastal areas, Quiet operation - quiet backyard environment, AHRI certified performance - independent lab certified performance ensures value of purchase, 2in x 2 1/2in CPVC union plumbing connections - common union for installation or service, adapts to larger plumbing recommended for greater efficiencies. I am quite sure Ill learn lots of new stuff right here! You've got a choice of single zone or multizone where you've got multiple rooms heated by a single outside unit that would be multizone. All Where did you purchase your duct and fan? That's because you can't produce heat from natural gas without producing CO2. "Voltage_240/60/1":"6" Another factor in Illinois and some other areas, is that our gas utility has a huge basic rate, before supplying us with any gas. We do model something about the cost of gas and electricity. Each page in the dataset indicates how much heat a given heat pump can produce at a given ambient temperature, and how much energy this costs. Under the Mass Sanitary Code, you know that landlords are responsible for maintaining the heating system, which means landlords have to clean those filters. (Propane BTU Calculator), 4 Highest Efficiency Heat Pumps In 2022 (Highest SEER + HSPF), 500-Gallon Propane Tank Dimensions (Length, Width, Weight, etc. Web12,000 BTU 19 SEER Multi-Positional Mitsubishi Mini-Split Single Zone H2i Hyper Heat Heat Pump - SVZ-KA12NAHZ A heat pump split system is an energy-efficient way to heat and cool your home year-round. Type Split Heat Pump; Cooling Capacity BTU 18000 Btu/H ; Heating Capacity Ton 18000 Btu/H ; Efficiency 16 WebConvection of Known Surface Area Calculator. In general, new construction projects or total gut renovations will find heat pump installation costs to be less. Let's look at the other Fujitsu. Im going to give you just an overview of the spreadsheet, how it works first. This tool compares heating only, not cooling. What Size Heat Pump Do I Need for 2000 Square Foot Home? WebSimply the Most Economical Way to Heat Pools and Spas. With a mini split heat, you will likely lower the cooling and heating costs quite a bit. Amana offers reliable and efficient heat pump systems with quiet operation and advanced features. That is 370% efficiency. These are complicated that's where we spend most of our effort. } The spreadsheet proves this comment was broadly correct, if one throws a dart at any number of heat pump models. How much does heat pump efficiency drops in cold climates is described by the heat pump efficiency vs temperature graph (for temperatures between 0F To 60F). We've picked an average point recently. We carry an extensive selection of these energy-efficient products. But the point is yes, John you're right, you've got to be careful with how you approach this decision. Lets boil these 8 factors down into 1 simple rule of thumb: Some of the factors in Manual J cancel each other out. , Got it. In order to figure out your much electricity does your heat pump use, you have to consider 3 main factors that the heat pump wattage depends on: Now, determining exactly how many watts does a heat pump require to run isnt all that easy. Massachusetts has several different climate regions. This work is very expensive, ranging from $2 -3.25 per sq.ft. I have come to understand that a lot of these systems are oversized because they were designed to keep the place warm with the windows open especially following the Spanish Flu Pandemic of the 1910s, they wanted to have air ventilation and so especially these steam heat systems like what you see in high rises especially in New York, they were designed to be way overpowered so they could keep this place reasonably comfortable even with a lot of fresh air circulation because people were worried about contagion in ventilation, so funny how things history repeats. First of all, we will look at how to get to the wattage of any heat pump via SEER rating. Rheem heat pumps can deliver quiet, efficient heating and cooling. Im looking to get a mini spilt ductless heat pump for a 450 sq ft foot print cabin with a 300 sq ft loft and the cabin is open beam construction ceiling at about 16 feet. This is much lower than the 30-50k BTU range from the rule of thumb. "ItemThumbnailImage" : "/assets/images/ExtendedSitesCatalogAssetStore/products/thumb/HeatPro-2012.jpg" Lets say that we have a 24,000 BTU heat pump. We've got an efficiency metric. Second of all, it's important to see how they actually fare. , As you aptly point out: Yes, the 80,000 BTU is WAY too big for a 1000 sq ft unit. NEEP, Northeast Energy Efficiency Partnership, has this tremendous list which Ill show later where they have all kinds of great searching and you can see individual heat pump models and they tell you all the things you need to calculate or predict performance. Ruud is a respected brand that can provide you with efficient and reliable heating all winter long. WebUses a smaller Btu input per burner for quieter start-up and operation while providing more even heat distribution. Its broken because Ive failed to update something. I like the helpful information you provide in your articles. When the garage and kitchen are done, you are looking at 1,900 sq ft of 57,000 BTU or about 5 tons. The advantage the loft and cabin are open to each other offers you is this: You can use a 1-zone mini split for the whole place. } Good:Your home is fairly new, or it has been updated with house wrap, increased insulation in the attic and/or new energy efficient doors and windows. Compared to an air source heat pump, it depends on where you get your electricity from. , Hope this clears things a bit. Ill explain this. Instead of removing our meter, they immediately sent out a crew to install a new one to (we think) make sure we werent cheating. Because natural gas is regrettably a dead-end technology, like so many other technologies before it. Leo asks, Do you have a recommendation for a heat pump that can be used as a sole source of heat for Boston winters?. So let's investigate that claim. We're linearly interpolating between design points so if I look at the comparison tab for this heat pump here, you can see that this GE Endure which is expensive compared to natural gas is not so brilliant. But the comment is specifically wrong when the apartment is insulated, the heat pump is optimized for cold weather, and the system is sized and selected for the space. Your weather's going to be pretty different from what Worcester experiences, so you can go and get your own heating degrees data and load that in if you're looking at a particular property. We can help with instructions on how to reset and fix it. This tool is unbiased. please update your current version of Internet Explorer or try using a different browser. "Heating Type_Heat Pump":"5" 30 BTU of heating output per 1 sq ft of living space. Ruud heat pumps are made with high-quality materials and parts. "ItemAngleFullImage" : { In general, heat pumps that fared impressively badly were underpowered for a cold climate. These metrics are useful to identify makes and models of interest. Doing its job: The heat pump will keep your home cool and dehumidified in summer and plenty warm in winter without overdoing it. "ItemAngleFullImage" : { Due to 90% efficiency (90 AFUE), the input will be 85,106 BTU. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Copyright 2014-2023, PICKHVAC All Rights Reserved. Sizing a heat pump seems like a daunting task. "image_3" : "/assets/images//assets/images/poolscanada/products/medium/4_HeatPro-100K-BTU-Heat-Pump.jpg" Is a large heat pump an option in this sized building? I know that the Worcester one is KORH, so I can get my own weather. "Features_Titanium Heat Exchanger":"3" Namely, you can see that: What does this lower COP at low temperature actually mean in terms of heating output? It looks like SJ points out that data for the Fujitsu is incorrect at 5 Fahrenheit on the spreadsheet. It doesn't ask your email or anything like that. There are four main reasons: First, natural gas is explosive, as we saw tragically in the Merrimack valley gas explosions of 2018. "Related Products_Heater Accessories":"3" Ill come to that in a second, but we're just putting in a fixed price, so if the price changes a lot we'll have to update the tool. _ecr.ecorebates1017216 = ["HP31005T","HP21404T","HP21254T","HP21004T","HP21004TC ","HP21124T","HP31204T","HP21404TC","W3HP21404T","W3HP21104T","W3HP21004T"]; if(typeof(shoppingListJSItemList) == "undefined" || shoppingListJSItemList == null || !shoppingListJSItemList) { So we know what our input requirement is for the furnace because we know how much heat loss for the apartment is and we know the efficiency, so we have to input more than we actually need because we're going to send a lot of the heat up the, chimney 20 percent of it. This model considers only the operating cost of air source heat pumps vs natural gas. ft. requiring a 12,000 BTU mini ducted heat pump. How To Check How Many Watts Does A Heat Pumps Use? Thank-you. Stephen, allow me The sheet is just a numbers cruncher, not meant to take the place of a skilled hvac installer. Bryant combines system control intelligence with variable-speed operation to provide amazing reliability, as well as energy savings and ultimate comfort. Now, the HVAC professional will take into account the installation R-values. These you type in based on what you look at down here, so these might not be totally accurate and you might want to update them but I think they're roughly right. , "Related Products_Heater Accessories":"3" Typically when we're looking at heat pumps, we're trying to heat the house when it's cold so it's important to know that when the outdoor temperature is around 20 Fahrenheit, a heat pump can produce a lot of output heat. There's a nice Penn State website about it. "Voltage_240/60/1":"8" Whenever you have a power outage, every heat pump owner wants to know one thing: How much electricity does a heat pump use?. How many BTU heat pump do I need? Then, let electric resistance heat make up the balance, during those rare extreme times when the heat pump efficiency is lowest and is not going to save significant energy/cost anyway. For homes with forced air heat, most often a 5 ton unit will be sufficient. Better Lives. So, total sq ft including the loft is about 750 sq ft, but the loft and the bottom level (450 Sq ft) are open to each other. Local solar generation gives you the option of taking supply costs into your own hands and monetizing solar with renters. What should I set my thermostat to in the winter? In short, a heat pump will have 400% efficiency. Pros, cons & considerations, https://www.hvac.com/troubleshooting/should-you-cover-roof-vents-in-the-winter/, Furnace limit switch repair and replacement cost, https://www.hvac.com/furnaces/furnace-limit-switches/. Its a good estimation tool but the best information about adequate size of a heat pump you get is if you already have a unit installed (as you do). New AC and furnace doesnt have that advantage; the cooling costs will be the same as with the dual system but the heating costs with separate AC and furnace will be much higher. It shows that certain air source heat pumps included in the model are three times as expensive to operate, on a per-BTU basis, than a natural gas furnace or boiler. There's a federal minimum of 80 percent. You will get up to 4 free quotes on heat pumps and they will help you out with proper heat pump sizing as well. You might be surprised! We read everything we can make an updated version to fix any typos and data or we've had that ref error appear when I tried to rename the thing so we'll get that updated. The more efficient mini-splits are smaller. "BTU Input_101,000 - 140,000":"2" Even if you would be living in Canada, that would be too much. So this is all orange. "Related Products_Heater Accessories":"3" Properly sized mini-splits (meaning not too big) do an excellent job of warming not blasting, and moving air almost continually, but they still are not capable of bringing heat down from upstairs, and cool air up from downstairs. "ItemImage" : "/assets/images/ExtendedSitesCatalogAssetStore/products/large/heatpro-2012.jpg", Here are heat pump sizes in tons and BTUs, so youll know what size to select. It needs two condensers you get twice the capital outlet cost. air), Sensible Heat (BTU/hr) = 1.1 x CFM x t (std. What is important is the overall height of the line (how much heat output, meaning how many condensers) and where the line peaks. The air source heat pump vs natural gas calculator spreadsheet evaluates the relative operating costs of air source heat pumps vs a natural gas boiler or furnace. This tool focuses on operating cost of heat pumps vs natural gas. Let's look at this spreadsheet in detail. , If you're installing new furnace, it has to be at least 80 percent efficient, so that's what we've got here in this example. 12,000 BTUs is one ton. These 8 rules include all the main and secondary factors when it comes to sizing any heat pump. (500W 40kW), Natural Gas BCF To MMBTU Calculator + MMBTU To BCF Calculator, MMBTU To MCF Conversion: Calculator + Chart (Natural Gas), MCF To MMBTU Calculator + Chart For Natural Gas, MCF To Therms Conversion Calculator + Chart (Natural Gas), Therms To MCF Conversion: Calculator + Chart For Natural Gas, How Much Electricity Does A Mini Split Use? "Attributes" : { Email us hello@masslandlords.net. , Note in the above analysis, which positions a heating-optimized Trane Mitsubishi against a cooling-optimized Fujitsu, that we are not expressly or by implication endorsing or denigrating any brand. We can use SEER rating to determine how many watts and amps do you need to run such a heat pump. Comment * document.getElementById("comment").setAttribute( "id", "a9ddf3fb2b536e4744e24216c1efb6d1" );document.getElementById("gb405c62cf").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. The contractor after a second house visit has suggested a larger size heat pump at 15,000 BTU. This will NEVER affect our opinion of a product or service! WebCOP heat pump = 308K/(308K-287K) = 14,67. Lastly, when designing a simple economical mini-split system, especially for an existing older home, it is critical to remember that warm air rises and cool air sinks, and that outdoor air that leaks in during winter can be very heavy, and very warm air near the ceiling can just get sucked outside through light fixtures, leaky windows, etc. They run the refrigerant line directly into the unit, but you could have a heat pump with ducting, a proper HVAC system. However, HSPF is measured at specific test conditions; thats why COP is pretty much the only relevant metric that can be used here. Remember I did type over some of these things earlier for the sake of showing a change there. WebDesigned with enhanced efficiency and supreme comfort, the Mitsubishi MSZ-FS06NA / MUZ-FS06NA single-zone mini-split is an ideal wall mounted unit to heat and cool a single room of your home or office. Many heat pumps on the NEEP list are variable speed. The best cold rated heat pumps are optimized for heat output at cold temperatures. Amana provides premium heating and cooling products that provide increased energy efficiency at a fraction of the traditional cost. It is assumed there are no leaks. As I mentioned, we can register a new model so the easy way to hack it and Ive saved a separate file here so Im not changing the official version but the easy way to hack it is just type in different numbers here from whatever other heat pump you want. We need to make money each year to provide housing long term. Heaters, Learn About There is generally a lot more heat required than air conditioning. "Features_Titanium Heat Exchanger":"3" "image_1" : "/assets/images//assets/images/pools/products/medium/HeatPro-Left.jpg" That will enable everybody to roughly estimate the size of the heat pump (be it a mini-split heat pump or ground-source heat pump). Condensers might need to be replaced. In terms of our apartment tab, this is the first real work for this spreadsheet here. We expect you to type it in. The spreadsheets default natural gas heat is an 80% efficient boiler capable of 80,000 BTU/hr input (64,000 BTU/hr output). Ill explain how all this works. If you can disconnect from their gas grid, you immediately have nearly a $300 head start over when you were using gas. , A lot of folks work at MassLandlords on a full and part-time basis. Profile, Create a Pool Owner "Application_In Ground Pools":"6" It could be because Ive opened it recently Ive broken it. Poor:Your home is old and hasnt been updated. They're probably all in that unit, and then you've got if it's a ductless mini split, you've got a head in a unit this is the hot side. This is this is optimized for 47 Fahrenheit, so that's not really a very cold climate optimized heat pump. Single Story "image_3" : "/assets/images//assets/images/poolscanada/products/thumb/4_HeatPro-100K-BTU-Heat-Pump.jpg" Im not sure, Steven. This heat capacity is usually measured at 47F; that means that at 45F such a heat pump will actually produce about 24,000 BTU of heating output (or a little below that). , What Size Heat Pump Do I Need for 1500 Square Foot House? (Watts, kWh, $), 120-Gallon Propane Tank Dimensions (Horizontal + Vertical V-120), 1000-Gallon Propane Tank Dimensions (Length, Weight, Etc. , How does the apartment calculation relate to the spreadsheet heat loss of 15,612? Do I have an off-the-cuff explanation for that? I hope that will make sense to people just because you do run the risk when you switch to heat pumps that your gas equipment is going to be something that you desperately miss. This tool does not account for the probability that gas or electricity prices may change in the future. You might be in the Cape and Islands. "Features_Titanium Heat Exchanger":"3" "Voltage_240/60/1":"8" click here to find heat pump specs, so that loads up and it takes us right to this very powerful free resource from the Northeast Energy Efficiency Partnership. How many heads do I need inside the units? "Features_Titanium Heat Exchanger":"2" , Hello Learnmatics, You will see a lot of temperatures being thrown around (from 32 degrees F, to 35F, even 40F, and so on). Then through the magic of thermodynamics, you run that refrigerant through a cycle and when it's running through your apartment, its very hot, and that's how you get heat transfer from the hot refrigerant out to the apartment air. Would be interested in the science behind that.. Im looking into a 4 ton 17 seer heat pump around 10 hspf as a way of switching from my current oil heat system. 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