020 3951 5133
London's HIU specialist — plans from £9.99/mo

Never Worry About Your
Hot Water Again

HIU cover from £9.99/mo — no surprises, no call-out stress. One fixed monthly fee covers all labour and unlimited callouts, so a breakdown never lands you with a surprise bill.

View Plans 020 3951 5133
Cover your HIU from just £9.99 a month — no surprise repair bills

Why Choose a Service Plan?

An emergency HIU repair can cost £300–£600 in parts and labour — sometimes more. A service plan turns that unpredictable expense into a small, fixed monthly cost. From just 66p a day, you get priority access to our engineers and full labour cover, whenever you need it.

Save Money Long-Term

One emergency repair often costs more than a full year on plan. Spread the cost and eliminate surprise bills.

Priority Response

Plan customers go to the front of the queue. We aim to respond to callouts within 24 hours, 7 days a week.

Peace of Mind

Know exactly what you're covered for. No haggling over repair quotes — just call us and we come out.

Extend Your HIU's Life

Regular attention and fast fault resolution keeps your HIU running efficiently for longer, delaying costly replacement.

HIU Service Plans

Peace of Mind, Engineered

Both plans run on a 12-month minimum term, paid monthly by direct debit via GoCardless. A £60 excess applies per callout claim on both plans.*

Basic Plan

£9.99/month

That's just 33p a day

Free repairs. You cover the parts.

  • £0 labour costs on all repairs
  • 25% off all HIU services
  • Unlimited callouts*
  • 12-month parts & labour warranty
  • All parts included
  • 24/7 priority support
Choose Plan
Most Popular

Premium Plan

£19.99/month

That's just 66p a day

Total HIU cover, zero hassle.

  • £0 labour costs on all repairs
  • 25% off all HIU services
  • Unlimited callouts*
  • 12-month parts & labour warranty
  • All parts included
  • 24/7 priority support
Choose Plan

* £60 excess per callout claim · 12-month minimum term · Subject to initial inspection · Paid by direct debit via GoCardless · T&Cs apply

How Much Could You Save?

One unexpected fault can cost as much as a full year on plan. Here's what typical repairs cost without cover.

Leak Repair

Internal valve, joint or heat exchanger leak — parts + labour

Typical cost without cover

Up to £600

Hot Water Fault

DHW valve, sensor, actuator or plate exchanger fault — parts + labour

Typical cost without cover

Up to £600

Basic Plan — £9.99/mo

£120/year

All labour and unlimited callouts.
Parts charged at cost price — no markup.

Best Value

Premium Plan — £19.99/mo

£240/year

Everything in Basic + all parts included.
Plus 24/7 priority support.

Cost comparisons based on typical repair scenarios. Individual costs may vary. Plans subject to 12-month minimum term and £60 callout excess.

Callout Excess Policy

All service plans include a fixed callout excess. Here's exactly how it works, what it covers, and when it applies — no small print surprises.

Fixed Excess Amount

£60

per callout claim

Charged once per fault claim — not per engineer visit. Payable at the time of booking. Non-refundable regardless of outcome.

What the Excess Covers

  • Engineer attendance at your property
  • Full fault diagnosis and investigation
  • All labour for covered repairs
  • Use of specialist tools and test equipment
  • Any follow-on visits for the same fault at no extra charge

When the Excess Applies

  • Each reactive callout for a new reported fault
  • Fault attendances where the repair cannot be completed on that visit
  • Diagnosis visits where parts need to be ordered
  • Emergency callouts outside standard response windows

When the Excess Does NOT Apply

  • Your annual HIU service visit (Premium plan)
  • Planned maintenance or inspections
  • Return visits to fit a part ordered during the same claim
  • Follow-on visits to complete the same repair already claimed
  • Discounted HIU service visits booked under the plan

Parts & Materials

  • Basic plan: parts quoted at cost price, approved by you before ordering
  • Premium plan: all HIU internal parts fully included
  • Non-covered repairs (e.g. tertiary systems) quoted separately — no work proceeds without your approval
  • All parts we fit carry a 12-month warranty

Why do we charge an excess? Your plan includes priority access to our engineers and full labour cover for every fault. The £60 excess per callout helps us maintain fast response times and keep your monthly plan cost as low as possible — while ensuring that the service is used for genuine faults. Think of it the same way as a car insurance excess: the cover is there when you need it, the excess keeps the premium affordable.

What Every Plan Includes

Priority Response

25% Off HIU Services

All Labour Covered

Unlimited Callouts*

Fixed Monthly Cost

12-Month Parts Warranty

What's Included at a Glance

FeatureBasic
£9.99/mo		Most PopularPremium
£19.99/mo
£0 labour costs on all repairs
Unlimited callouts*
25% off all HIU services
Fault diagnosis & pressure checks
All replacement parts included
Valve, sensor & actuator cover
24/7 priority support
12-month parts & labour warranty
Minimum term12 months12 months
Monthly cost£9.99£19.99

* Unlimited callout claims subject to a £60 excess per claim, payable at time of booking.

Getting Started Is Simple

1

Book Your Service

Call 020 3951 5133 or email contact@collidegroup.co.uk. We book you in for an HIU service just like any other booking — there is nothing to pay upfront.

2

We Attend & Inspect

Our engineer services your HIU and checks whether it qualifies for a plan. Payment is only taken once the visit is complete.

3

Cover Begins

If your unit qualifies, the service is charged at £105 (25% off) and your first monthly payment is taken — then you are covered. Call us whenever you have a fault.

Frequently Asked Questions

How do I sign up for a service plan?
Call us on 020 3951 5133 or email contact@collidegroup.co.uk. We book you in for an HIU service with nothing to pay upfront. Our engineer services the unit and checks it qualifies. If it does, the service is charged at your 25% member rate of £105 and your first monthly payment is taken. Cover begins once the inspection is complete and your first direct debit has been collected.
Is there a callout charge on service plans?
Yes — a fixed excess of £60 applies to every callout claim, regardless of the outcome. This is charged once per claim, even if multiple engineer visits are needed to resolve the same fault.
What does the £60 excess actually cover?
The excess covers the engineer's attendance, full fault diagnosis, all labour for covered repairs, and use of specialist tools. It is charged once per fault — not per visit. If we need to return to fit a part we've ordered, that return is part of the same claim at no extra charge.
Are replacement parts included?
Parts are not included on the Basic plan and will be quoted at cost price before any work begins. On the Premium plan, all HIU internal parts are fully covered.
What is the minimum contract term?
All plans have a 12-month minimum term. After that, either party can cancel with 30 days' written notice.
What if my HIU does not qualify for a plan?
You only pay for the visit that has taken place. If your unit needs repairs you choose not to have carried out, or is not eligible for any other reason, the service is charged at our standard rate of £140 on completion. The discounted £105 rate applies only where the plan goes ahead.
Do I still need an annual service on a plan?
Yes. Your HIU must be serviced by Collide Group once every 12 months to keep the plan valid and to renew it at the end of the term. The annual service is not included in the plan — it is booked and paid for separately, at your 25% plan-member rate of £105 instead of the standard £140.
What's the difference between Basic and Premium?
Both plans include all labour and unlimited callouts. On Basic you pay for parts at cost price. Premium adds all parts included at no extra cost, plus 24/7 priority support.
Can I upgrade my plan?
Yes. You can upgrade from Basic to Premium at any time by contacting us in writing. The new rate applies from your next billing date.
What HIU brands are covered?
All major brands — Danfoss, SAV, Switch2, Caleffi, Alfa Laval, Heatweb, Thermal Integration, Redan and others. Eligibility is confirmed at the initial inspection.
What happens if my HIU is end of life?
If an inspection or callout reveals the unit has reached end of life, we'll provide a written report and may offer a separate quotation for a new HIU installation.

Other HIU services: Annual HIU Service · HIU Repair · HIU Installation · Bulk Servicing · All Services

Don't Wait for a Breakdown

Get on plan today and protect your HIU before the next fault strikes. 25% off every HIU service, plans from £9.99/month, paid by easy direct debit.

Call 020 3951 5133 Email Us

Plans subject to initial inspection · 12-month minimum term · Direct debit via GoCardless · T&Cs apply