Ductless Heat Pumps for Passive Houses

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Ductless Heat Pumps for

Passive Houses

7777

thththth

_{Annual North American Passive House Conference}

September 27

September 27----30, 2012 Denver CO

30, 2012 Denver CO

Passive Houses

Mark T. Kuntz, PE, LEED-AP Mitsubishi Heating and Cooling

mkuntz@hvac.mea.com 630-562-9272

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Session Learning Objectives:

• Gain an understanding of the unique features and benefits of ductless heat pump technology

• Select the proper ductless heat pump based on load calculations and climate conditions

7777

thththth

_{Annual North American Passive House Conference}

September 27

September 27----30, 2012 Denver CO

30, 2012 Denver CO

climate conditions

• Determine the optimal indoor unit type and locate it for proper airflow distribution

• Interpolate energy usage data from the product specification tables for use in the PHPP software

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Mitsubishi Electric HVAC Division

• 30 years serving the US HVAC industry

• Split-ductless market leader

• 6 state-of-the-art training centers • 1,100+ stocking distributor branch locations 3 3 Atlanta, GA Atlanta, GA 1,100+ stocking distributor branch locations

• Exclusive Home Depot ductless provider

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Ductless Heat Pumps

•Highly Efficient

Up to 26 SEER Up to 10.6 HSPF

No ductwork = No duct losses

•Individual Room Control

•Variable Speed Operation Constant airflow 4 Constant airflow Excellent dehumidification Continuous filtration •Extremely Quiet 19 – 38 dB

•Cold Climate Capable

100% capacity at 5 F. 82% capacity at -13 F.

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INVERTER Compressor

• Over-sizing not an issue

• Output matches load requirements

• Comfort levels are reached quickly

• Extremely low sound levels from both fan and

compressor

• Constant circulation of conditioned air

DC Compressor

5

• Constant circulation of conditioned air

–

Improves humidity control

–

Reduces hot/cold pockets

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Montana Cold Climate Heat Pump Test – NEEA

•12,000 BTUH system

•23 SEER, 10.6 HSPF

•Continuous operation well below -10 degrees F

•Supply air discharge temperature in the 105+ temperature in the 105+ degrees F range

•COP’s between 1.5 and 2.0 during sub-zero operation

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Multi-Zone Ductless Heat Pumps

• 2 to 8 indoor units per outdoor

• 20,000 – 48,000 BTUH

• Various indoor styles Wall

Ceiling Floor

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Indoor Unit Flexibility

4-way cassette

Floor-standing Low-profile ducted

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Wallace Farmstead – In Progress

• 3500 square feet • Three comfort zones

• 6000 BTUH wall mount • 9000 BTUH ceiling

mount

• 9000 BTUH ceiling mount

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Comments from Jesse Thompson, AIA, LEED AP:

Wallace Farmstead – Finished Product

It's happily sitting at 74 degrees in 95 degree heat, silently and calmly.

The heat pumps are outstanding, they just work, quietly and effectively. just work, quietly and effectively.

So far it seems to be a great combination of aesthetics and function.

1.5 tons for a 3,500 SF house feels pretty good...

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MSZ-FE H2i Heating Performance

80% 100% 120% % H e a ti n g C a p a c it y 100% 82% 62% 100% 92%

Cold Climate Performance

14 0% 20% 40% 60% 80% -13 -4 5 14 23 32 41 45 Outdoor Temperature (F) % H e a ti n g C a p a c it y MSZ-FE09 MSZ-FE12 62% 75% 58% 14

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iSee Comfort Sensor

improves comfort & efficiency

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• Senses and controls for temperature felt by people in room

• Helps prevent over cooling or under heating

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ECONO COOL

• Adjusts air directed towards the body based on leaving

air temperature.

• Set temperature automatically adjusts (up to 4°F)

without loss in comfort

• Up to 20% increase in efficiency

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• Up to 20% increase in efficiency

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Indoor Air Quality Benefits

HYBRID

CATECHIN

PRE-FILTER

Antioxidants absorb odor-causing gases

Wash by rinsing or clean by light vacuuming

Effective for 10+ years

1

ANTI-ALLERGEN

FILTER

Blue enzymes help trap dust, pollen, mites, and other particles that can cause allergic reactions, Breaks down Sulfur atom

2

PLATINUM

CATALYST

FILTER

High power odor absorption through

nanotechnology ceramic surface

Microscopic pores (less than 10 nanometers in size)

3

18 Effective for 10+ years

with proper care

Breaks down Sulfur atom (S-S) bonds in allergens and transforms them into non-allergens

Clean with light vacuuming Replace every year for

best performance

than 10 nanometers in size) absorb microscopic odors Clean with light vacuuming Replace when no longer

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Room-to-room Air Transfer

•Quiet •Efficient •No ductwork •Room-to-room or floor-to-floor •Room-to-room or floor-to-floor

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Ductless Heat Pump Conclusions

• DHPs are sized to match Passive House loads

• DHPs operate at part loads with excellent efficiency and functionality

• Multi-zone systems add interior flexibility and zonal control

• Cold climate versions provide excellent performance to -13F

• An installation and service infrastructure is in place to facilitate projects nationwide

projects nationwide

• Extensive literature, case studies and supporting material can be accessed at www.MitsubishiPro.com