FAQ’s

Frequently Asked Questions

You can do this by using wallpaper, backing paper or by sellotaping a few large sheets of paper together. Lay the paper flat into the bay area as if fitting a carpet. Accurately cut to fit against the skirting board or plaster finish. If the bay is angled then ensure the angle corner points on the template are accurate and sharp.

Visit our template page for step by step instructions on how to make a bay window paper template.
  • Your Full Name
  • Your Full Address
  • Your Contact Number
  • Your Order Number (if you have one)
  • The brand of the radiator you have ordered (Eco Rad or Ultraheat)
  • The length and height of the radiator ordered
  • State whether the template was taken from the plaster finish or skirting board. If it was taken from the skirting board then please write the thickness of the skirting board on the paper template.
Fold the paper and place into a large enough envelope or a plastic postal bag to prevent it from getting wet during transit. Clearly write or print a label with the below postal address and affix onto the package.

Please post the template to:
Shiv Radiators Ltd, 232 Headstone Lane, Harrow, HA2 6LY
The top grill is fitted on the top of the radiator.
It has two purposes;
  1. It makes the radiator look more attractive
  2. It helps to act as a guard to reduce the chances of items falling behind the radiator.
Please note we can provide top grills for both curved and angled radiators.
We sell Eco Rad and Ultraheat single convector radiators.

Ordering a custom made bay window radiator couldn’t be easier.

STEP 1 - Decide which type and size of radiator you require
  • First you need to check your bay window area to see if it has a curved or angled wall below the window. If you know which size radiator you require for your room, then simply browse our range of sizes. Use the filters to narrow your search down.
  • When selecting the radiator length, ensure you allow enough space for pipe work so that the radiator fits within the bay.
  • Use the BTU calculator to help work out how much heat output is required for the room size and refine your search.
STEP 2 - Decide whethe you require a top grill
  • For an even more impressive finish you can add a radiator top grill onto your curved or angled radiator. This is custom made to fit on either curved or angled radiators allowing you to retain the original look of the radiator.
STEP 3 - Make a template of the bay window
  • If you wish to proceed with the order then we require you to make a template of the bay area. If you selected an ANGLED radiator then you will need to make a paper template. You can do this by using wallpaper backing paper or something similar. You must then post this to our office address.
  • If you selected a CURVED radiator then you can either make a paper template or submit your measurements using our online template. If you are unsure on how to make a paper template please watch our video for step by step instructions to assist you. Then simply fold the template up (no need to put into a tube), and place into a large envelope.
STEP 4 - Proceed with your order
  • Once you have selected your radiator, add this to your order and continue to checkout. Check your order is correct and that you have either entered the bay window measurements or opted for a paper template.
  • Enter your delivery details and place your order. No payment details will be require at this stage.
  • You will receive an email with your order confirmation after you have placed your order.
STEP 5 - Post your template to Shiv Radiators (if you selected Post a Paper Template)
  • Please write the following details on the paper template;
    • Your Full Name
    • Your Full Address
    • Your Contact Number
    • Your Order Number (if you have one)
    • The brand of the radiator you have ordered (Eco Rad or Ultraheat)
    • The length and height of the radiator ordered
    • State whether the template was taken from the plaster finish or skirting board. If it was taken from the skirting board then please write the thickness of the skirting board on the paper template.
  • Then simply post the template to:
    • Shiv Radiators Ltd, 232 Headstone Lane, Harrow, HA2 6LY
STEP 6 - Wait for a confirmation call and make payment
  • Once we receive your order and the paper template has been sent to us, a sales representative will be in contact with you within 24 hours to discuss your order.
  • Preferred payment options will be discussed over the phone. All major credit/debit cards are accepted.
STEP 7 - Work completed. Await delivery date confirmation
  • When the radiator fabrication is complete we will contact you to organise a suitable day for delivery of your new radiator.
If you are outside M25 then we can only deliver radiators up to certain lengths and heights.
  • On 300mm height radiators the maximum length is 2700mm (2.7 metres)
  • On 400mm height radiators the maximum length is 2400mm (2.4 metres)
  • On 500mm height radiators the maximum length is 2200mm (2.2 metres)
  • On 600mm height radiators the maximum length is 2200mm (2.2 metres)
If you require a radiator longer than this and are located outside the M25, then we are happy for you to collect the radiator from our workshop premises. Please mention this when our sales representative contacts you to confirm your order.
BTU is short for British Thermal Unit. It is a unit of measurement that shows just how much energy your radiator uses to remove heat from a room based on its size. The higher the BTU, the higher the energy output will be. This also depends on the size of the room and how insulated are the walls and roof.

Please be sure when you are comparing BTU outputs you are comparing like for like. We display BTU at Delta 50 (ΔT50)

All reputable supplies adhere to BS EN 442 which specifies:
Flow = 75°C, return = 65°C, room = 20°C; i.e a delta of 50°C.

Still unsure? Try using our BTU calculator to help you work out the correct BTU required for a particular room size.
To help make sure you do not buy a radiator that is the wrong size. The heating calculator will work out the output watts and BTU required to heat the room where the radiator will be placed.

We display BTU (ΔT50) at Delta 50.
Delta 50 (75°/65°/20°) - with Delta T of 50°C, means 75°C inlet water temperature, 65°C outlet water temperature and 20°C of room temperature.

All reputable supplies adhere to BS EN 442 which specifies:
Flow = 75°C, return = 65°C, room = 20°C; i.e a delta of 50°C.

The mean average water temperature is 70°C (i.e. 75 plus 65 divide by 2). If we then take the 20°C room temperature we are left with a temperature differential of 50°C or Delta T of 50.
To convert ΔT50 to ΔT60 simply multiply x 1.264.
Delta 60 (90°/70°/20°) - with Delta T of 60°C, means 90°C inlet water temperature, 70°C outlet water temperature and 20°C of room temperature.

Flow = 90°C, return = 70°C, room = 20°C; i.e a delta of 60°C.

The mean average water temperature is 80°C (i.e. 90 plus 70 divide by 2). If we then take the 20°C room temperature we are left with a temperature differential of 60°C or Delta T of 60.
To convert ΔT50 to ΔT60 simply multiply x 1.264.
1 BTU is equal to 0.293W. That means that 24,000 BTU is equal to 24,000 BTU x 0.293 watts/BTU = 7,032 watts

For Watts to BTU conversions, 1W is equal to 3.41 BTU/h. Therefore to convert BTU into Watts you need to divide by 3.41; to convert Watts into BTU you need to multiply by 3.41.
The TRV controls the radiators temperature by sensing the room air temperature and automatically opening and closing the flow to the radiator to maintain a preset temperature. A manual valve controls the temperature of the radiator regardless of how warm the room already is. TRVs are now a requirement as part of Building Regulations, check with your installer to make sure you have the correct valves.

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