Daikin AC (Americas), Inc.

1645 Wallace Drive, Su ite 110

Carrollton, TX 75006 USA TEL: 866

- 4DAIKIN

FAX: 972

- 245

- 1038

www.daikinac.com

March 26 , 2013

Rebecca von dem Hagen Dave Godwin

Alternatives & Emissions Reduction Branch Alternatives & Emissions Reduction Branch

Stratospheric Protection Division Stratospheric Protection Division

Environmental Protection Agency Environmental Protection Agency

1310 L Street, NW 1310 L Street, NW

10 th Floor (MC 6205J) 10 th Floor (MC 6205J)

Washington, DC 20005 Washington, DC 20005

RE: Supplemental Information in Response to EPA Questions Regarding

Daikin U.S. Corporation’s Pending SN AP Petition for

HFC

- 32 in Residential and Light Commercial Air Conditioners and Heat Pumps

VIA EMAI L

Dear Ms. von dem Hagen and Mr. Godwin:

Daikin U.S. Corporation (Daikin) is providing the following supplemental information in

response to the Envir onmental Protection Agency’s (EPA) email inquiry dated March 25 , 2013,

regarding Daikin’s pending Significant New Alternatives Program (SNAP) petition for HFC

- 32

(R32) in (1) household and light commercial air conditioning (new uses only), and (2) resident ial

air conditioning and heat pumps (new uses only).

EPA requested that Daikin provide more detailed information regarding applications within the

scope of UL 484 for which Daikin is requesting approval. In response to EPA’s request, Daikin

provides the following information:

Daikin’s application covers p ackaged terminal air conditioners and heat pumps as defined in 10

C.F.R. § 431.92, and summarized as follows:

“Packaged terminal air

- conditioner” means a wall sleeve and a separate un

- encased combination

of heating and cooling assemblies specified by the manufacturer and intended for mounting

through the wall. It includes refrigeration components, separable outdoor louvers, forced

ventilation, and heating availability by the purchaser’s choice of, at lea st, hot water, steam, or

electrical resistance heat. [Note: models designated as “cooling only” units need not include

heating elements if the physical characteristics and arrangement of the refrigeration system are

identical to those of models with heati ng capability.]

“Packaged terminal heat pump” means a separate un

- encased refrigeration system installed in a

cabinet having a function and configuration similar to that of a packaged terminal air

- conditioner.

It uses reverse cycle refrigeration as its p rime heat source and should have other supplemental

heat source(s) available to purchasers with the choice of, at least, hot water, steam, or electric

resistance heat.

Daikin’s request refers to packaged terminal air

- conditioners and packaged terminal hea t pumps

in the following applications, as well as in similar applications:Daikin U.S. Corporation Supplemental Comments in Support of R

- 32 SNAP Petition

Page 2 of 2

• Hotel and motel guest rooms

• Hospitals and assisted living facilities

• Apartments, college dormitories and military barracks

• Offices and similar spaces in a variety of types of build ings

Please let me know if you have any more questions or if you require any more information.

Sincerely,

Mark V. Stanga

for Daikin U.S. Corporation

cc: SNAP Document Control Officer

U.S. EPA, Office of Air and Radiation, 6205J

1200 Pennsylvania Ave., N.W.

Washington, DC 20460