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

Product ID: 51533280

Details

Brand
Platinum
Colour
Blue
Form factor
Tower
Indoor/Outdoor usage
Indoor
Power source
Hardwiring

💡Energy-saving auto standby

🔥400W integral heater

🌬️6-speed airflow control

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Description

🌿 Breathe smarter, live fresher — your home’s invisible comfort upgrade!

DIY FRIENDLY SETUP - Simple installation with included template—perfect for motivated homeowners
WHOLE HOME FRESHNESS - Continuous filtered air circulation for a healthier, mold-free environment
SMART ENERGY EFFICIENCY - Auto standby mode during warm months slashes your energy bills
COMFORT TEMPERED AIRFLOW - 400W heater element tempers incoming air for cozy, draft-free warmth
LOFT MOUNTED CONVENIENCE - Discreet installation in loft space keeps your living areas clutter-free

The Nuaire Drimaster DRI-ECO-HEAT-HCS is a loft-mounted Positive Input Ventilation unit featuring a 400W integral heater and 6-speed fan control. Designed to continuously introduce fresh, filtered air into your home, it reduces condensation and mold risk while maintaining energy efficiency with an auto standby mode during warmer months. Ideal for modern homes, it offers a simple DIY installation and ensures a healthier, more comfortable living environment year-round.

Specifications

ASIN	B00NIV51RU
Best Sellers Rank	162,697 in DIY & Tools ( See Top 100 in DIY & Tools ) 768 in Registers, Grilles & Vents
Brand Name	Platinum Building Chemicals
Colour	Blue
Customer Reviews	4.7 4.7 out of 5 stars (182)
Form Factor	Tower
Fuel Type	Electric
Heat Output	400 Watts
Heating Element	Radiant
Heating Method	Convection
Indoor Outdoor Usage	Indoor
Item Weight	5.7 Kilograms
Manufacturer	Platinum Building Chemicals
Mounting Type	Ceiling Mount
Number of Speeds	6
Power Source	Hardwiring required
Unit Count	1.0 count
Voltage	240 Volts

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$1982.93

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In stock

Sold byAmazon British Virgin IslandsDelivered 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 British Virgin Islands.

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