Yuju EnvironTech Buyer Support & FAQ

Yuju EnvironTech Global HVAC Solutions

HVAC Products： Heat Pump Systems Air Handler Units ENERGY STAR Rooftop Heat Pumps PTAC Air Conditioners Custom HVAC Projects

YUJU EnvironTech

Contact YUJU

Company Name:
Yuju EnvironTech Co., Ltd.

TEL:+86 571 8690 5176

WhatsApp / Mobile:
+86 159 5816 7850

Business Email:
yuju201455@gmail.com

Web:www.yujuenv.com

Office Address:
Room 3402, Block C2,
Wangjing International,
Qianjiang Century City,
Hangzhou, Zhejiang, China

Home > Industry News > Buyer Support & FAQ

Buyer Support & FAQ

Can rooftop HVAC units use R454B refrigerant?[ 2026-08-29 ]

Yes. Rooftop HVAC units can be designed for R454B, but the complete equipment must be specifically engineered and approved for the refrigerant and applicable A2L safety requirements.
What is external static pressure for a rooftop packaged unit?[ 2026-08-29 ]

External static pressure is the resistance the rooftop unit supply fan must overcome from the connected ducts, filters, fittings, dampers, grilles and diffusers.
How do I select the correct rooftop unit capacity?[ 2026-08-29 ]

The correct rooftop unit capacity should be based on building cooling and heating load, climate, ventilation, occupancy, internal gains and duct-system conditions rather than floor area alone.
Can a rooftop unit include fresh air intake?[ 2026-08-29 ]

Yes. Rooftop packaged HVAC units can be configured with outdoor-air intake options such as a fresh-air hood or economizer, depending on the selected model and project requirements.
What does downflow mean on a rooftop HVAC unit?[ 2026-08-29 ]

Downflow means the rooftop unit supplies conditioned air downward through the bottom of the cabinet, usually directly into roof-mounted ductwork or a rooftop curb.
What is the difference between a rooftop unit and a split HVAC system?[ 2026-08-29 ]

A rooftop unit combines the main HVAC components in one outdoor cabinet, while a split system uses separate indoor and outdoor units connected by refrigerant piping.
What is a rooftop packaged HVAC unit?[ 2026-08-29 ]

A rooftop packaged HVAC unit is a self-contained heating and cooling system installed on a building roof, combining major HVAC components in one outdoor cabinet.
What information should I provide for an HVAC quotation?[ 2026-08-29 ]

For an accurate HVAC quotation, provide capacity or project drawings, location, electrical supply, installation type, duct information, zoning requirements and expected quantity.

<<<1 2 3 4 5 6 7 8 >>>

Scan Contact Us

WhatsApp Email Phone Top

HVAC Solutions

Products

Climate Solution

Projects

Industry News

OEM Solutions

Contact