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  1. Replies
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    How many BTUs of output were your two old oil...

    How many BTUs of output were your two old oil furnaces?

    Your Zuba represents roughly 40,000 BTU of output. That should mean that if you have a 40,000 BTU heat loss, it should run all day on the...
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    Our Zuba has been working like a dream, no...

    Our Zuba has been working like a dream, no problems yet.

    I'm not sure precisely how the heat anticipation works on the new digital Honeywell thermostats, but that could have something to do with...
  3. Replies
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    12,915

    Here in Canada, this comes as a package product...

    Here in Canada, this comes as a package product directly from MITS. I went with the 'Package 3', Honeywell VisionPro Thermostat with a 7.5 kW Electric resistance heater kit built into the Air...
  4. Replies
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    12,915

    [QUOTE=acsolutionsllc;12435611] How do you...

    How do you mean? There is no need for a balance point calculation with a 1.8 heat pump COP vs. the 1.0 COP of electricity. 1.8>1.0.

    The heat loss matches the heat output of the unit. On a...
  5. Replies
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    12,915

    This is technically a 'P' Series commercial...

    This is technically a 'P' Series commercial Mitsubishi condensing unit. It is rated to operate down to -40C (-40F).
  6. Replies
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    28A needing a 30A breaker for Condensing unit,...

    28A needing a 30A breaker for Condensing unit, and 2.7A needing a 15A breaker for Air Handler.
  7. Replies
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    12,915

    They married the Mitsubishi Mr Slim Condenser to...

    They married the Mitsubishi Mr Slim Condenser to a North American ECM air handler with an Evap coil. The system is designed so it can be retro'd into existing sheet metal systems.
  8. Replies
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    12,915

    I know I'm going to get it now. :) ...

    I know I'm going to get it now. :)

    http://i1126.photobucket.com/albums/l616/brennus1/Zuba/IMG_0265.jpg

    http://i1126.photobucket.com/albums/l616/brennus1/Zuba/IMG_0266.jpg
    ...
  9. Replies
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    Working great actually, with a HUGE impact on the...

    Working great actually, with a HUGE impact on the power bill so far.

    I actually did spray foam the inside and siliconed the outside, no rats getting in there. I'm going back soon, I'll try to...
  10. Replies
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    12,915

    New Zuba Central Install

    This is the Canadian Zuba Central Air-to-Air heat pump made by Mitsubishi Electric. Its based off the same technology as City Multi, and can heat with COPs over 1.0 at -30C (-22F). The design day...
  11. Replies
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    3,083

    Sure any horizontal install is cheaper than...

    Sure any horizontal install is cheaper than vertical.

    We have a lot of rocky soil here in Ontario and soil conditions are often difficult for geo installs. This could have been why we were...
  12. Replies
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    The arguement behind avoiding slinkies was that...

    The arguement behind avoiding slinkies was that pipe spacing is very critical on that kind of loop, and you have to be much more careful how you install them when compared to a standard horizontal...
  13. Replies
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    I just went to a dealer training on loop sizing...

    I just went to a dealer training on loop sizing and installation, and they said that slinky loops are mostly pointless, and you'd be saving a lot of time, money, and effort by just installing either...
  14. I haven't seen any literature or dealer...

    I haven't seen any literature or dealer representation supporting Whalen for residential, but I have dealt with them extensively in condo suite applications, and they seem to never break down. Kind...
  15. This thread has sold me on WF customer service.

    This thread has sold me on WF customer service.
  16. Replies
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    I'd say add full dampers to the ductwork let it...

    I'd say add full dampers to the ductwork let it double as a balancing lab
  17. Replies
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    41,386

    I'd say hire a proficient, knowlegeable installer...

    I'd say hire a proficient, knowlegeable installer regardless.
  18. Replies
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    Not the techniques manual, but useful...

    Not the techniques manual, but useful
  19. Replies
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    Would be awesome if there was an online...

    Would be awesome if there was an online calculator for comparing the Zuba to anything. In my opinion, it is the single best resi air-air heat pump on the market at the moment, and the comparitive...
  20. Replies
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    41,386

    We do have cold incoming water here, 70 degree...

    We do have cold incoming water here, 70 degree delta usually. I usually recommend people install the largest size unit as possible to offset the GPM decrease with the big delta. I haven't tried to...
  21. Replies
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    41,386

    Navien is a big player up here in Ontario in...

    Navien is a big player up here in Ontario in terms of tankless water heaters, but I don't hear anyone on here even talking about Naviens. They make the most efficient unit on the market as of right...
  22. In Canada, in Ontario, most furnaces and air...

    In Canada, in Ontario, most furnaces and air handlers are located in heated basements, making drain water freezing a non-issue. I'd say filling your trap with antifreeze after the cooling season is...
  23. Replies
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    Heat pumps deliver lower supply air temperatures...

    Heat pumps deliver lower supply air temperatures than gas furnaces. Your temperature readings show that your air is inceasing in temperature, you just have to get used to the air coming out of the...
  24. Replies
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    I have installed many of the Trane flow-through...

    I have installed many of the Trane flow-through bypass humidifiers. They drain away water instead of letting it stand like the old rotary-drum style. This is a very good thing because I've seen some...
  25. Replies
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    3,419

    Normally you size the Heat Pump for cooling, so...

    Normally you size the Heat Pump for cooling, so yes if the contractors are recommending a 2 ton A/C, you'd install a 2 ton Heat Pump.
  26. Replies
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    You can have your A/C replaced with a heat pump...

    You can have your A/C replaced with a heat pump while keeping your gas furnace. You will probably need a new thermostat to go with it. A Heat Pump thermostat will run the Heat Pump until it gets too...
  27. A small amount of knowledge is dangerous. Better...

    A small amount of knowledge is dangerous. Better to keep the DIYers in the dark than show the best of us what to do better.
  28. Replies
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    Low in water solubility; from what I've been told...

    Low in water solubility; from what I've been told at least geothermal isn't ideal here. I'm not an expert in geothermal though.

    Servicibility for geothermal also seems like a nightmare, but...
  29. Replies
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    Very high clay content in soil. Geothermal is...

    Very high clay content in soil. Geothermal is possible, but not nearly as effective here as other places.

    We're on city water, and incoming cold water can get as low as 50 F in winter.
  30. Replies
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    I'm trying to select a system design to be the...

    I'm trying to select a system design to be the basis for an ideal design formula.

    The equipment matters just like the operating cost that results from that that equipment matters. Future...
  31. Replies
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    3,342

    I was talking to the sales guy for Mitsubishi of...

    I was talking to the sales guy for Mitsubishi of Canada today and I asked him about this system. This is a variation of the same technology of the City Multi, but works with a central forced-air...
  32. Replies
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    Which is better? Yes, and yes.

    Which is better?




    Yes, and yes.
  33. Replies
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    What is the most energy-efficient system ?

    I have heard many manufacturers claim that their systems are "more energy efficient" than the competition. My question is, if you were building a house from the ground up to be high efficiency, what...
  34. The biggest problem I see with your systems...

    The biggest problem I see with your systems design is that you're saving gas at the cost of burning more electricity though, not to mention the additional cost of installing a second water heater. ...
  35. What temperature would you keep the pre-heated...

    What temperature would you keep the pre-heated storage tank at? If you store the water at too cool a temp, you could have bacteria start making their home in your water tank.
  36. I would not recommend buying less than a...

    I would not recommend buying less than a high-efficiency, condensing tankless unit, although it's always cheaper to buy a less efficient unit. High efficiency, condensing (90%+) tankless units just...
  37. Unless you're in an area with high water...

    Unless you're in an area with high water hardness, or its way out of your price range then do yourself a favor and buy a tankless instead. Aside from less wasted square-footage in the house, you're...
  38. Replies
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    While not being the cheapest option, if you...

    While not being the cheapest option, if you really don't want to tap into the main supply air for the rest of the house, you could always install a ductless-split type system. Especially if you...
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