Will the unit be beneficial if the loft itself has high relative humidity? (measured 85% RH at 8 degrees C )

I am not really qualified to answer your question. But as I understand the benefits of this unit, is that it`s all about ventilation, movement of air, creating a positive pressure forcing air out of the natural gaps around doors,windows and vents, replacing with fresh air from the roof space. Although you have a higher humidity in the loft you should still benefit from the circulation of air around the property

Does this have a remote control, not mobile enough to climb a ladder?

No remote control but just get a switch fitted by an electrician somewhere convenient that you can switch off/on when you choose too, but Nuaire recommend leaving on all year, I don't leave on in the summer months but retrieves cool air during the night when really hot.

What position should the heater adjustment pot on the control panel normally be set to for most economical running? Many thanks.

I think the default was 12 deg but changed mine to 8 deg but if the weather is really cold you do notice the air blowing into the house. Mostly it depends on where the unit is placed in the loft (mine above hot water tank so any heat rising into the loft is recycled) plus your lagging but I would try at default and see how often the heater kicks in and change later. Hope this helps!

When bolted to the rafters, it there much vibration or fan noise?

Mine is right outside and above 2 off my bedrooms and we hear no noise at all from it. And it doesn’t get bolted to rafters. It is suspended by string from them so technically it won’t vibrate against them at all. Hope that helps.

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DRI-ECO-HEAT-HCS Nuaire Drimaster Heated PIV with Hall Controls

DRI-ECO-HEAT-HCS Nuaire Drimaster Heated PIV with Hall Controls

Product ID: 51533280

Details

Brand
Platinum
Colour
Blue
Form factor
Tower
Indoor/Outdoor usage
Indoor
Special feature
Unique Heater

⚡Energy-efficient standby mode

🏠Whole home loft ventilation

🔥400W radiant heater

¥226202

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Description

🔥 Elevate your home's air game with smart warmth and fresh vibes!

SIMPLE HARDWIRED SETUP - One power supply connection for hassle-free installation and reliable operation.
CONTINUOUS FRESH AIRFLOW - Positive Input Ventilation ensures a steady stream of filtered, fresh air throughout your home.
ENERGY SMART STANDBY MODE - Automatically powers down during warm months to save energy without compromising comfort.
OPTIMIZED LOFT INSTALLATION - Seamlessly mounts in loft spaces for discreet, space-saving ventilation.
INTEGRATED 400 W RADIANT HEATER - Heats incoming air behind the diffuser for cozy, tempered airflow all year round.

The Nuaire Drimaster DRI-ECO-HEAT-HCS is a loft-mounted Positive Input Ventilation unit featuring a unique 400W radiant heater positioned behind the diffuser. Designed for whole-home ventilation, it continuously introduces fresh, filtered air while tempering airflow for comfort. Its energy-efficient standby mode activates during warmer months, optimizing power use. Ideal for UK homes, it offers a sleek, hardwired installation with six-speed settings to maintain a healthy indoor environment.

Specifications

ASIN	B00NIV51RU
Best Sellers Rank	168,467 in DIY & Tools ( See Top 100 in DIY & Tools ) 809 in Registers, Grilles & Vents
Brand Name	Platinum Building Chemicals
Colour	Blue
Country of Origin	United Kingdom
Customer Reviews	4.7 4.7 out of 5 stars (185)
Form Factor	Tower
Fuel Type	Electric
Heat Output	400 Watts
Heating Element	Radiant
Heating Method	Convection
Indoor Outdoor Usage	Indoor
Item Highlight	Designed for loft installation, Integral air heater, Hall controls
Item Weight	5.7 Kilograms
Manufacturer	Platinum Building Chemicals
Mounting Type	Ceiling Mount
Number of Items	1
Number of Packs	1
Number of Speeds	6
Power Source	Hardwiring required
Room Type	Loft
Special Features	Unique Heater Position, Energy Efficient Standby Mode
Unit Count	1.0 count
Voltage	240 Volts

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TrustScore 4.5 | 7,300+ reviews

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¥226202

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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TrustScore 4.5 | 7,300+ reviews

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