T7Design 3.5kw Lightweight Heater with Side Vents and 2 x 32mm Outlets 12v for Classic Minis

T7Design 3.5kw Lightweight Heater with Side Vents and 2 x 32mm Outlets 12v for Classic Minis

Air Conditioning Split System Y Splitter Splicer -6 #6 5/8-16 Thread T7Design Front View

#6 Y Splitter / Splicer (High Side) 5/8-18 MIO

T7Design 3.5kw Lightweight Heater with Side Vents and 2 x 51mm Outlets 12v

£168.00 £140.00
Availability: In stock

T7Design 3.5kw Lightweight Heater with Side Vents and 2 x 51mm Outlets 12v

The 3.5kw Lightweight Heater with Side Vents is our second smallest and lightest hot water-based heater after the 2.2kw Micro Heater, sacrificing a little weight for more performance this unit can be used as a more powerful defrost heater and can also provide more cabin heat. The side vents version incorporates two adjustable lower vents to blow air direct into the footwells of the cabin and 2 x 51mm (2") outlets in the top half of the enclosure for air ducting.

The heater uses a specially designed copper & brass heater core offering excellent heat transfer capabilities for its size, this is accomplished using a high flow core design, high fin density and ultra-thin wall tube.

A lightweight axial fan is used to draw air through the heater core and expel it through the outlet nozzles. The Axial fans are at a minimum 50% lighter and use 25% of the power over traditional centrifugal blowers.

The 3.5kw Lightweight Heater is ideal for use in vehicles for defrosting windscreens, or as a backup heating device for vehicles if you already have a heated windscreen. If you have a large windscreen you can connect up all outlets to feed the windscreen.

Specification Metric Imperial & Other
Heat Output 3.5 kw 11,900 BTU
Airflow 322 m3/hr 190 cfm
Weight 1.15 kg 2.53 lbs
Hose Size ∅ 13mm ∅ 1/2"
Air Nozzle Size 51mm 2"
Noise Level 60 dB (Max Fan Speed) -
Voltage 12v
Current Continuous / Startup 2a / 3a
Fan Speeds Single Speed
Enclosure Construction Aluminium Enclosure with Black Powdercoat Finish
Heater Core Design Copper & Brass Core with Copper Fins
Manufacturer T7Design Ltd
Part Number 28D-B3E-FC4
Wiring Information

The fan has no onboard speed control, the simplest way to operate this fan is to use an ON/OFF toggle or rocker switch. If you would like to adjust the fan speed please see our PWM fan controller.

Wire Colour Use
Red Wire +12v
Black Wire Earth

Please ensure your supply is fused appropriately, it is recommended to use a 3a fuse and that your cable is rated higher than the fuse.


The dimensioned drawing shown below is for our standard 3.5kw Lightweight Heater but shares the same overall dimensions as the side vents version.

3.5kw Lightweight Heater Dimensions
  • Please note that a corrosion inhibitor such as glycol or anti-freeze should be used to prevent corrosion and prolong the useful life of all components used in the vehicles cooling system.
  • Not suitable for use in cooling systems that run at pressure higher than 2 bar (28 psi).
More Information
Air Hose Size 50 - 51mm (2")
Fan Speeds 1 Speed
Motor Type Brushed
Hose Size 13mm
Voltage 12v DC
Manufacturer T7Design

Shipping Information & Charges

VAT is included on the UK prices below, no VAT is applicable on ROW prices.

European Customers: We offer a next working day delivery service to most European countries, please get in touch for pricing.

ROW Customers: If you would like a more accurate shipping quote or a faster service via DHL please get in touch with your requirements.

United Kingdom & Northern Ireland

Service GBP 0 - 50 (inc VAT) GBP 50+ (inc VAT)
RM Second Class 3.60 N/A
RM First Class 4.20 N/A
DPD Next Working Day 9.00 9.00
DHL UK Next Working Day 8.75 8.75
DPD Next Working Day by 12am 16.50 16.50
DPD Saturday All Day 15.00 15.00
DPD Saturday by 12am 39.50 39.50
DPD Sunday All Day 19.50 19.50

Scottish Highlands & Islands, Channel Isles, Scilly Isles, Isle Of Man, Isle of Wight
Service GBP 0 - 50 (inc VAT) GBP 50+ (inc VAT)
RM First Class 4.20 N/A
DPD / DHL Two Day 17.30 17.30


DHL Tracked Delivery. Approx 2 - 7 days depending on distance from the UK.

Country Cost in GBP
AUT - Austria 30.00
BEL - Belgium 25.00
BIH - Bosnia and Herzegovina 50.00
BGR - Bulgaria 45.00
HRV - Croatia 35.00
CZE - Czech Republic 35.00
CHE - Switzerland 42.00
CYP - Cyprus 75.00
DNK - Denmark 30.00
EST - Estonia 35.00
FIN - Finland 35.00
FRA - France 35.00
DEU - Germany 28.00
GIB - Gibraltar 46.00
GRC - Greece 40.00
HUN - Hungary 35.00
IRL - Ireland 25.00
ISL - Iceland 50.00
ITA - Italy 32.00
LVA - Latvia 46.00
LTU - Lithuania 45.00
LUX - Luxembourg 26.00
NLD - Netherlands 26.00
NOR - Norway 45.00
POL - Poland 35.00
PRT - Portugal 35.00
ROU - Romania 45.00
SRB - Serbia 45.00
SVN - Slovenia 35.00
SVK - Slovakia 35.00
ESP - Spain 30.00
SWE - Sweden 35.00

Rest Of World

Below are the most popular countries we ship to world-wide. If your country is not listed please get in touch for a quote.

DHL Express: We offer shipping via DHL, please get in touch for pricing and more information on their Worldwide 1-2 day services.

Country Cost in GBP
CAN - Canada 60.00
JAM - Jamaica 50.00
JPN - Japan 70.00
MLT - Malta 58.00
MYS - Malaysia 50.00
NZL - New Zealand 52.00
RUS - Russia 50.00
ZAF - South Africa 49.00
THA - Thailand 55.00
USA - United States of America 70.00
SGP - Singapore 90.00


By Order Value: GBP 0 - 50 GBP 50 - 120 GBP 120+
AUS - Australia 40.00 60.00 80.00