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Originally Posted by Rickdeol

Hi guys I am in toronto building Passivehouse . Looking to install mistbushi Zuba system but couldn’t find any contractor yet . Tried few contractors so far nobody is interested . Please if anybody know good company in toronto to install Zuba system please let me know
Thanks

I am an HVAC contractor based out of Mississauga. I specialize in Mitsubishi and Ductless systems.

Please contact me by email at woodwardmechanical@gmail.com , and I would be glad to take a look at your project.

Mistbushi Zuba system

Hi guys I am in toronto building Passivehouse . Looking to install mistbushi Zuba system but couldn’t find any contractor yet . Tried few contractors so far nobody is interested . Please if anybody know good company in toronto to install Zuba system please let me know
Thanks

Originally Posted by vintage3

Thanks for the reply...We own a duplex which we converted to a single home so two oil furnaces were removed and replaced with the Zuba along with reworked ducting.How often are your fan cycle times?...or when the fan "ramps" up.Thanks

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 coldest day of the year. If your heat loss is more than 40,000 BTU, than it will be running all day with Electric resistance backup when it's still a shoulder season.

Thanks for the reply...We own a duplex which we converted to a single home so two oil furnaces were removed and replaced with the Zuba along with reworked ducting.How often are your fan cycle times?...or when the fan "ramps" up.Thanks

Originally Posted by vintage3

Just installed the same package,how is yours performing?The only question I have is the blower cycling time..how long should it be or is it normal for this system to have long cycle times?Thanks

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 it.

Right-sizing your heat plant to your application also results in the heating plant having longer run cycles. What was the old system you replaced with the Zuba?

Originally Posted by dc-v tech

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 Handler.

http://www.mitsubishielectric.ca/en/...fications.html

Just installed the same package,how is yours performing?The only question I have is the blower cycling time..how long should it be or is it normal for this system to have long cycle times?Thanks

I am having a Mitsubishi Zuba installed this week. The installer insists I need a 15KW heater. Yesterday I found out that the heater coil was damaged and they can't finish it till they get the replacement. I am going to tell them to finish it without the heater coil if we need the coil it can be installed later

Originally Posted by LibertyTree

Did you use the PVFY air handler with this?

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 Handler.

http://www.mitsubishielectric.ca/en/...fications.html

[QUOTE=acsolutionsllc;12435611]

Originally Posted by dc-v tech

The heat pump should be able to carry 100% load without the electric backup heater ever firing.



Did you calculate the balance point to make that determination?

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 design day, the heat pump should run all day, and that is ideal. The electric heater is just a 100% capacity redundant heat source. I actually have the Em. Heat locked out through the Honeywell VisionPro thermostat to not fire unless the temperature drops below -15C (5F).

Originally Posted by luv2cruiserccl

So how cold will this unit actually run down to and still produce heat?

This is technically a 'P' Series commercial Mitsubishi condensing unit. It is rated to operate down to -40C (-40F).

Yes they are available in the USA.

Originally Posted by luv2cruiserccl

i wish there was some more info i looked on line but it was based in Canada. Might contact local hvac wholesale shop get some info i like the looks of these units.

Check out my other thread, I'm pretty sure this is the same thing or close enough.

http://hvac-talk.com/vbb/showthread.php?t=1026511

Originally Posted by luv2cruiserccl

i wish there was some more info i looked on line but it was based in Canada. Might contact local hvac wholesale shop get some info i like the looks of these units.

I believe they are only available in Canada.

i wish there was some more info i looked on line but it was based in Canada. Might contact local hvac wholesale shop get some info i like the looks of these units.

Did you use the PVFY air handler with this?

anyone know if this is available in the USA or just Canada?

Originally Posted by dc-v tech

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 for the area of the install is -18C (0F), and the unit is supposed to have a COP over 1.8 at that temp.

This install is a small cottage, the existing heating source was electric baseboard heaters and this was a full retro with full new metal. HL calc came out at 36,000 BTU, and the 3 ton Mitsubishi unit puts out 40,000 BTU in heating. The heat pump should be able to carry 100% load without the electric backup heater ever firing.

All the bends were done with a tubing bender, there are 3 welds on the whole system.

So how cold will this unit actually run down to and still produce heat?

looks ok.. would of put strut on the wall an cush clamps on lineset an would of ran emt for electrical.. maybe even clad lineset .. just my two cents..

[QUOTE=dc-v tech;8126321] The heat pump should be able to carry 100% load without the electric backup heater ever firing.



Did you calculate the balance point to make that determination?

I am looking at installing a Mitsubishi Zuba Central, living in Southwest New Brunswick. What type of heating system do you have central air or hydronic?