If it's a new and separate mini-split with it's own compressor, they both will modulate down to 1700 BTU/hr @ 47F, and it's less than a $200 upcharge for the FH09 over the FH06, which should have plenty of margin even for Polar Vortex events. Mini splits are ductless heating-and-cooling systems. Pacific N.W. If that is the case, it is recommended to just leave it at 70F, or if we aren't going to be in the space, would you suggest turning the temp down to 60-64F? With a mini split, this isn’t necessary, as they are designed with a dehumidification function that helps reduce the humidity levels in your basement. The usual advice applies: When designing a heating system, the first step is to perform a heat load calculation. The mini split systems are designed to cool and heat a room, meaning you don’t need to install two separate orders. Maryland HVAC company proudly serving Anne Arundel, Prince George’s and other surrounding counties. Again, because basements are underground, some may lack windows entirely, or some may have small windows that are located at ground level (up high). R5 would even be enough in your climate. Does the EER matter on a ductless mini-split? © 2020 The Taunton Press, Inc. All rights reserved. On the other hand, mini splits use no ductwork and only require an electrical connection. © Copyright 2019 Grove Heating & Cooling. Become a GBA Prime member and get full access to GBA articles, enyclopedia, videos, CAD library, and more. To size your mini split air conditioner, the most important thing you need to know is the square footage of the room you’re looking to cool and/or heat. Here is an overview of my DIY project of installing a 3/4 ton Pioneer AC heat pump. Based upon this link, it looks like basement walls need an R13 value in my climate zone. You’ve finally got round to converting your basement. Our current basement has 10′ ceilings, poured concrete walls with 2″ foam attached to them and then studs. We had a mini split (Mits Hyper Heat) installed this Fall, primarily for heating, but will also use for cooling. So, if you want to retrofit your basement with traditional A/C, you’ll be looking at a major renovation project. Their indoor air handling units can be strategically placed where space allows, and multiple indoor units can be connected to a single exterior condenser. The only thing is, you’re unsure of what heating and cooling system to use. Refrigerant lines that connect the outdoor and indoor units. The ductless mini systems boast an advanced air filtration system that guarantees excellent quality air. I can further insulate the area between the studs and foam board if that is recommended, I don't have a problem with that. Solution: With some solid pre-construction planning, we were able to design and install a ductless mini split system for the basement controlled completely independent of the rest of the home. I won't use the previous contractor again due to some issues that I'd rather not get into on here. Discussion on the installation Mitsubishi Electric ductless system in a basement bonus room in a Massachusetts home. With a ductless mini split installed in your basement, you can breathe easily, find that perfect temperature and enjoy your new comfy surroundings in what once was a little old basement. If the floor above is heated with resistance electricity, and not with a heat pump, keeping the basement at 70F with the mini-split will lower total amount of power used for heating the whole house. My feeling is that for a "well-insulated" 1000 sq ft basement in NJ, assuming its open floor layout with no air distribution issue, even a 9000 BTU/h mini-split may be oversized. There has to be enough load at average winter conditions to keep it in the modulation range to have any kind of efficiency, and you mostly likely don't have enough load to make the FH12 or FH15 modulate very much even in mid-winter. Ductless HVAC systems provide room-by-room, year-round comfort at a more reasonable price—without tearing … Here are links to relevant articles: How to Perform a Heat-Loss Calculation — Part 1, How to Perform a Heat-Loss Calculation — Part 2. Mini splits are heat pumps and as with any other heat pump you end up with the same cooling and heating capacity by the nature of the beast, regardless of the load your home represents. These heat pump systems do not require ducts to be ran, cutting costs and conserving space. I have a partially finished basement that I am preparing to install. This pipe connects the inside to an outdoor unit that is mounted straight onto the wall. Basement Mini-split Sizing. IRC code min for zone 5 foundations is R15 continuous insulation, so with only 2" of foam you're a bit shy of the mark. It’s a must for home improvement and a must for the wallet. Adding R13-R15 (unfaced or kraft faced) to the studwall will knock off 1000 BTU/hr or more from the total load, and even if the 2" foam is EPS (R8-ish) it will have more than adequate dew point control on the above grade section for mitigating against wintertime condensation without using interior vapor retarders (other than standard interior latex paint.) Also, it’s so much cheaper than adding more ductwork when adding the finishing additions to your home! In some climates it's going to be worth putting some fiberglass or rock wool in the 2x4 wall, tight to the foam-board. Can You Put a Ductless Mini Split in a Basement? Life is good. With many different systems to choose from, the first thing you’re probably going to think about is not breaking the bank. We would need to know lots more information to help you. Looking for reccomendations on a mini split for my basement. If the floor above is heated with resistance electricity, and not with a heat pump, keeping the basement at 70F with the mini-split will lower total amount of power used for heating the whole house. Hi - I am deciding between the LG Art Cool Gallery 9000K BTU LA090HVP or their 12000 BTU LA120HVP for our basement, mostly because we like the picture option, trust the brand, and have been told by various HVAC folks that 9 or 12K will suffice, but honestly have discounted all those that have said my basement requires 18-24K min. Because of the humidity and sometimes mold levels, the air purity in basements isn’t always the healthiest. - GroveHVAC We plan to either drywall or put some sort of high-end paneling up on the walls to “semi-finish” the space, even though I’m going to leave the ceiling open. The mini-split works to reduce the temperatures evenly in most areas much like a heat pump would. Although mini-split systems can be expensive, their ease of installation and versatility may make the cost worth it. This means a second air conditioning system is required. The elimination of air ducts gives the mini splits a massive advantage over traditional cooling systems. Heating and cooling loads are very rarely the same number of BTUs. We only have electric heat in our neighborhood, so I’m wondering since the basement is below grade, can we get away with a single head from Mitsubishi to heat the space? The U-factor of the 2" foam + foundation + drywall is going to be about U0.1 BTU/hr per square foot per degree-F. Insulating the studwall will cut that in half. As previously mentioned, windows are often scarce in basements. However, as the air cools, the moisture that is present condenses into a liquid. If you want a four zone mini split AC system and need to mix and match the BTUs on the evaporators, this is the system you’ll want. The minisplit then works to dehumidify by capturing that moisture and separating it from the air that is moving out of the system. One indoor unit upstairs, in the primary living area, has handled all the heat so far. In order to size your mini split correctly, you will need to know the square footage of the room, and check it against our table. Cue the reliable ductless mini split system. The one that can modulate LOWEST with the best modulation range is the FH09 at ~1700 BTU/hr @ +47F, when married to a compressor that can also modulate that low. One of the easiest ways to heat your basement is to build on your existing system. This won't delete the articles you've saved, just the list. Although most basements are simply used for storage, there are countless other possibilities of what you could be doing with this extra space if you were able to make it more comfortable. Keeping excess humidity at bay is essential and often ongoing. Mini splits are designed to cool the room they are located in. With ducted mini-split systems, evaporators are generally located close to the distribution point, which leads to a reduced amount of air leakage and dirt build-up in ductwork related to mini-split systems. It sounds like from what you are saying, a 9k head would be sufficient and doesn't make sense to spend the additional funds on a 12k or 15k head. If you have time to research and want to get the sizing right, I also recommend going through the greenbuildingadvisor website for info/personal education on mini-splits and insulation. Mini split … this would be a new install, as the branch box is currently installed in our attic, and I don't want an additional line set running on the exterior of the house. It will raise the dew point and humidity in the basement which will try to equalize in the rest of the house. More than just the additional funds, bumping up to an FH12 or FH15 would result in LOWER efficiency & comfort due to much higher minimum-modulation levels, of 3700 BTU/hr and 5150 BTU/hr respectively, (@ 47F), compared to 1600 BTU/hr for the FH06 & FH09: https://nonul.mylinkdrive.com/files/MSZ-FH06NA_MUZ-FH06NA_ProductDataSheet.pdf, https://nonul.mylinkdrive.com/files/MSZ-FH09NA_MUZ-FH09NA_Submittal.pdf, http://meus1.mylinkdrive.com/files/MSZ-FH12NA_MUZ-FH12NA-1_ProductDataSheet.pdf, http://meus1.mylinkdrive.com/files/MSZ-FH15NA_MUZ-FH15NA_Submittal.pdf. Rooms that get pretty warm can have the temperature adjusted to be more comfortable. Energy-efficient; Save energy and lower your energy bills. I can turn it on in my basement for like a half hour and practically freeze out the place once the humidity is below 40%. This system can truly meet the needs for any size room: small to large. ROLLICOOL Mini-Split AC: Personal Climate Control with Powerful Cooling. Each mini split air conditioner unit is made of: A condenser – placed outside the building. With their low energy costs and energy efficiency, a ductless mini split air conditioning system is perfect for any basement. Rooms that aren’t being used regularly can be turned off to save energy. Advantages of mini-split air conditioners. The only downside to a mini-split is cost. Unlike traditional systems, ductless mini splits are less prone to energy losses owing to their lack of ductwork requirement. The rim joists have spray foam sprayed around the perimeter, and on the east wall, above grade, is where our attached garage is located. That makes me think that it might just be cheaper and more efficient to install the mini split in the basement running on its own thermostat versus just branching ductwork from the ceiling of the first floor all the way back into the basement (especially since I don't know anything about HVAC). FAQ: Why Do Some Builders Avoid Foam Insulation. The single-zone mini split system from Mitsubishi is ideal if you want to heat or cool a single room. Perhaps a 9k, 12k or 15k head would do the trick to keep it comfortable around 67-70 degrees? As a general rule, a mini-split will deliver higher efficiency if it's allowed to run all the time during the heating season, not just when you plan to use the space. You can do 4 x 9K, 4 x 24k, or any other variation in between. Use our mini-split heat pump sizing calculator to build your ductless system, whether it's a single room or multiple rooms. Cooling and heating power control the individual temperature in each room. filtration that! 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